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Alfa Romeo Sprint GT (Veloce)
Encyclopedia
The Alfa Romeo 105/115 series Coupé
s were a range of cars made by the Italian
manufacturer Alfa Romeo
from 1963 until 1977. They were the successors to the celebrated Giulietta Sprint
coupé and used a shortened floorpan
from the Giulia
Berlina car.
shared by all models was designed by Giorgetto Giugiaro
for Bertone. It was one of his first major projects for Bertone, and borrowed heavily from his earlier design for the Alfa Romeo 2000 Sprint/2600 Sprint
. The balance of glass and metal, the influence of the shape of the front and rear glass on the shape of the cabin, and the flat grille with incorporated headlamps were groundbreaking styling features for the era.
A limited production (1000 units) convertible
was a modification from the standard car by Touring
of Milan, offered as a catalogue model by Alfa Romeo called the Giulia Sprint GTC.
A small number of the GT Junior models were also built with a very different, aerodynamic two-seater coupe body designed by Ercole Spada
for Zagato
of Milan. These too were offered by Alfa Romeo as catalogue models, as the GT 1300 Junior Zagato and later GT 1600 Junior Zagato.
in various cubic capacities from 1290 cc to 1962 cc, all with two valves per cylinder. All versions of this engine fitted to the 105 series coupes featured twin carburettors, except for US market 1750 GTV and 2000 GTV cars which were fitted with fuel injection
. Competition models featured cylinder heads with twin spark plugs. Common to all models was also a 5-speed manual transmission
and disc brakes on all four wheels. The rear suspension uses a beam axle with coil springs. Air conditioning
and a limited slip rear differential
were optional on the later models.
The 105 series coupés featured the GT (Gran Turismo) model description, which was common to all models in one form or another.
The various models in this range can be considered in two broad categories.
On one hand were the various Gran Turismos (GT) and Gran Turismo Veloces (GTV), (veloce is Italian for "fast"). These were meant to be the most sporting cars in the Alfa Romeo range and sold very well to enthusiastic motorists around the world. The first model available was the Giulia Sprint GT (1963) which evolved into the Giulia Sprint GT Veloce (1965), the 1750 GTV (1968) and the 2000 GTV (1972–1976), with engines increasing in cubic capacity from 1570 cc (Giulia Sprint GT/GTV) through 1779 cc (1750 GTV) to 1962 cc (2000 GTV). A limited production (1000 units) convertible
, the Giulia Sprint GTC, was based on the Giulia Sprint GT, modified by Touring of Milan. It was only made over two years from 1964 to 1966.
On the other hand was the GT Junior range, which featured engines with smaller cubic capacities. GT Juniors sold in great numbers to people who wanted a sporting, stylish car that handled well, but either did not require the maximum in engine power, or could not afford the taxation on larger engine capacities in some markets - most notably, Alfa Romeo's home Italian market. Junior models began with the first GT 1300 Junior in 1966. The GT 1300 Junior continued until 1976 with the 1290 cc engine and various modifications incorporating features from the evolution of the GT's and GTV's. From 1972 a GT 1600 Junior model was also available, with the 1570 cc engine.
The 1300 Junior and 1600 Junior also became available with a very different, aerodynamic two-seater coupe body designed by Ercole Spada
for Zagato
of Milan. These models were the GT 1300 Junior Zagato and GT 1600 Junior Zagato.
Both categories were used to derive GTA
("Allegerita", or "lightened") models, which were specifically intended for competition homologation
in their respective engine size classes. The GTA's featured extensive modifications for racing, so they were priced much higher than the standard models and sold in much smaller numbers. Practically all GTA's made were used in competition, where they had a long and successful history in various classes and category. These models included the Giulia Sprint GTA
, GTA 1300 Junior
, and GTAm
(a much evolved version of the GTA built by Autodelta
).
Although not commonly thought of as a 105 Series coupe variant, the Alfa Romeo Montreal
used a strengthened and slightly modified 105 series floorpan and suspension.
The Giulia Sprint GT was the first model introduced, and was manufactured from 1963 to 1966. It featured the original form of the Bertone body with the scalina (stepped) or "step front" (the leading edge of the hood/bonnet sat 1/4 an inch above the nose of the car). It can be most easily distinguished from other models by the following features:
The car was fitted with the 1570 cc displacement
version of the engine (78 mm bore × 82 mm stroke, 6.38 L oil sump, 7.41 L radiator). Dunlop disc brakes were fitted all around. The rear brakes featured an unusual arrangement with the slave cylinders mounted on the axle tubes, operating the calipers by a system of levers and cranks. 31,955 Sprint GTs were produced.
The Giulia Sprint GTC was a Cabriolet version produced in very limited numbers making them rare today with a total production of 1000 in right and left hand drive versions. Only 99 were made for the British and South African market. The car was based on the Giulia Sprint GT, with the cabriolet modification carried out by Touring of Milan. Besides the cabriolet top, a distinguishing feature is the dashboard finished in black instead of grey crackle. The model was badged with a script reading "Giulia Sprint GTC" on the bootlid.
To restore some of the bodyshell rigidity lost by removing the fixed roof and pillars, Carrozzeria Touring added reinforcement to several areas of the bodyshell. Through the production life of the model, several modifications to the reinforcement applied were made by Touring, apparently in an effort to improve the stiffening achieved.
Carrozzeria Touring was in financial trouble when the Giulia Spring GTC went into production. The company went out of business shortly after production of this model ended.
The Giulia Sprint GT Veloce was very similar to the original Giulia Sprint GT. It featured minor modifications to the engine, providing just 3 bhp more power, but significantly improved torque. It can be most easily distinguished from other models by the following features:
Early Giulia Sprint GT Veloces featured the same Dunlop disc brake system as the Giulia Sprint GT. Later cars replaced this with the ATE disc brakes as pioneered on the GT 1300 Junior in 1966. The ATE brakes featured an interesting and more effective handbrake system on the rear brakes, which incorporated drum brakes inside the disc castings.
A total of 14,240 Giulia Sprint GT Veloces were made before production finished.
U.S. tipo: 105.51. Motore: 00571.
The 1750 GTV appeared in 1967 along with the 1750 Berlina
sedan and 1750 Spider
. The same type of engine was used to power all three versions; this rationalisation was a first for Alfa Romeo.
The 1750 GTV replaced the Giulia Sprint GT Veloce and introduced many updates and modifications. Most significantly, the engine capacity was increased to 1779 cc displacement (80 mm bore × 88.5 mm stroke, 6.61l oil capacity, 9.58l radiator capacity). Peak power from the engine was increased to 122 PS at 5500 rpm. The stroke was lengthened from 82 to 88.5 mm over the 1600 engine, and a reduced rev limit from 7000 rpm to 6000 rpm. Maximum torque was increased to 186 newton metre at 3000 rpm. A higher ratio final drive was fitted (10/41 instead of 9/41) but the same gearbox ratios were retained. The result was that, on paper, the car had only slightly improved performance compared to the Giulia Sprint GT Veloce, but on the road it was much more flexible to drive and it was easier to maintain higher average speeds for fast touring. For the United States market, the 1779 cc engine was fitted with a fuel injection
system made by Alfa Romeo subsidiary SPICA
, to meet emission control laws that were coming into effect at the time. Fuel injection was also featured on Canadian market cars after 1971. Carburettors were retained for other markets.
The chassis was also significantly modified. Tire size went to 165/14 from 155/15 and wheel size to 5 1/2J x 15 instead of 5J x 15, giving a wider section and slightly smaller rolling diameter. The suspension geometry was also revised, and an anti-roll bar was fitted to the rear suspension. ATE disc brakes were fitted from the outset, but with bigger front discs and calipers than the ones fitted to GT 1300 Juniors and late Giulia Sprint GT Veloces. The changes resulted in significant improvements to the handling and braking, which once again made it easier for the driver to maintain high average speeds for fast touring.
The 1750 GTV also departed significantly from the earlier cars externally. New nose styling eliminated the "stepped" hood of the Giulia Sprint GT, GTC, GTA and early GT 1300 Juniors and incorporated four headlamps. For the 1971 model year, United States market 1750 GTV's also featured larger rear light clusters (there were no 1970 model year Alfas on the US market). Besides the chrome "1750" badge on the bootlid, there was also a round Alfa Romeo badge. Similar Quadrofoglio badges to those on the Giulia Sprint GT Veloce were fitted on C pillars, but the Quadrofoglio was coloured gold instead of green. The car also adopted the higher rear wheelarches first seen on the GT 1300 Junior.
The interior was also much modified over that of earlier cars. There was a new dashboard with large speedometer and tachometer instruments in twin binnacles closer to the driver's line of sight. The instruments were mounted at a more conventional angle, avoiding the reflections caused by the upward angled flat dash of earlier cars. Conversely, auxiliary instruments were moved to angled bezels in the centre console, further from the driver's line of sight than before. The new seats introduced adjustable headrests which merged with the top of the seat when fully down. The window winder levers, the door release levers and the quarterlight vent knobs were also restyled. The remote release for the boot (trunk) lid, located on the inside of the door opening on the B-post just under the door lock striker, was moved from the right hand side of the car to the left hand side. The location of this item was always independent of whether the car was left hand drive or right hand drive.
Early (Series 1) 1750 GTV's featured the same bumpers as the Giulia Sprint GT Veloce, with the front bumper modified to mount the indicator / sidelight units on the top of its corners, or under the bumper on US market cars.
The Series 2 1750 GTV of 1970 introduced other mechanical changes, including a dual circuit braking system (split front and rear, with separate servos). The brake and clutch pedals on left hand drive cars were also of an improved pendant design, instead of the earlier floor-hinged type. On right hand drive cars the floor-hinged pedals were retained, as there was no space for the pedal box behind the carburettors. Externally, the series 2 1750 GTV is identified by new, slimmer bumpers with front and rear overriders. The combined front indicator and sidelight units were now mounted to the front panel instead of the front bumper, except again on the 1971-72 US/Canadian market cars. The interior was slightly modified, with the seats retaining the same basic outline but following a simpler design.
44,269 1750 GTVs were made before their replacement came along.
U.S. tipo: 11501. Motore: 01500.
The 2000 GTV was introduced in 1971 together with the 2000 Berlina
sedan and 2000 Spider
. The 2000 range was the replacement for the 1750 range. Once again the engine was rationalized throughout the range. The engine displacement was increased to 1962 cc with a change of the bore and stroke to 84 mm × 88.5 mm. Oil and radiator capacities remained unchanged. The engine produced 132 PS at 5500 rpm with the SPICA
fuel injection, which, once again, was only fitted to cars destined for the United States and Canadian markets, with carburetors retained for other markets producing 152 PS.
The interior trim was also changed, with the most notable differences being the introduction of a separate instrument cluster, instead of the gauges installed in the dash panel in earlier cars.
Externally the 2000 GTV is most easily distinguished by the following features:
From 1974 on, the 105 Series coupe models were rationalized and these external features became common to post-1974 GT 1300 Junior and GT 1600 Junior models, with only few distinguishing features marking the difference between models. See below.
37,459 2000 GTVs were made before production ended.
The GT 1300 Junior was the entry model to the Alfa Romeo coupe range. It was introduced in 1965 as the replacement for the 101 series Giulia Sprint 1300
, which was the final development of the Giulietta Sprint
series.
The GT 1300 Junior was fitted with the 1300 (1290 cc) twin cam
engine
(74 mm bore × 75 mm stroke), as fitted to the Giulietta series cars, but revised for the 105 series with reduced port sizes and other modifications. The smaller engine was introduced in order to allow buyers to choose an Alfa Romeo coupe while avoiding the higher taxes on the models with larger engine capacity, especially in Alfa Romeo's home Italian market.
The performance was low-end compared to others in its model
line, with a total of 89 bhp. However, the GT 1300 Junior's top speed of over 100 mph and 0-60 mph time of 12.6 seconds were very good for a fully appointed coupe with an engine of only 1300 cc displacement.
The GT 1300 Junior was in production for over a decade. Throughout this period it was updated by the factory, incorporating many of the same revisions applied to the larger-engined models.
The first GT 1300 Juniors produced were based on the Giulia Sprint GT, with a simpler interior. The major external identifying feature was the black grille with just one horizontal chrome bar. The same 9/41 final drive ratio was maintained, but with a shorter 5th gear ratio of 0.85, instead of 0.79 as on all the other 105 Series coupes.
Together with the Giulia 1300 Ti
, the GT 1300 Junior pioneered the use of ATE disc brakes as later fitted throughout the 105 series, replacing the Dunlop discs on earlier cars. The first few GT 1300 Juniors lacked a brake servo, and had the low rear wheelarches of the Giulia Sprint GT and Giulia Sprint GTV. From 1967, a servo was fitted as standard, together with higher rear wheelarches as adopted later on the 1750 GTV.
In 1968, concurrently with the replacement of the Giulia Sprint GT Veloce by the 1750 GTV, the GT 1300 Junior was revised with many of the new parts from the 1750 GTV. This included the dashboard, the suspension and the new wheel size of 5½ × 14J instead of 4½ × 15J. This revised GT 1300 Junior, however, retained the early "step-front" body style, which, interestingly, makes it the most mechanically refined production "step-front" model. Another intriguing detail is that, just as on the 1750 GTV, the remote release for the boot (trunk) lid, located on the inside of the door opening on the B-post just under the door lock striker, was moved from the right hand side of the car to the left hand side. The location of this item was always independent of whether the car was left hand drive or right hand drive. This series of GT 1300 Junior was the only model with the step-front bodyshell to have this item mounted on the left hand side. All other step-front models - Giulia Sprint GT, Giulia Sprint GT Veloce, and early GT 1300 Junior with flat dashboard - featured this item on the right hand side.
From 1968 on, Alfa Romeo models for the US market were fitted with fuel injection systems instead of carburettors to comply with emissions control legislation. The only 105 Series models in which the classic twin-cam engine was fitted with fuel injection were the US market 1750 range, and the US market 2000 range which replaced the 1750s in mid-1972. No Alfa Romeo 1300 or 1600cc models were ever made with fuel injection.
In 1970 the Junior was revised a second time, and received the same nose treatment as the 1750 GTV, without the step but with only two headlights.
For 1972, new wheels featuring smaller hubcaps with exposed wheel nuts like those on the 2000 GTV were fitted. At the same time, the GT 1600 Junior was introduced alongside the GT 1300 Junior. The GT 1300 Junior was discontinued for the right hand drive UK market but continued to be available in other right hand drive markets.
From 1974 the GT1300 Junior and GT1600 Junior were both rationalised into a common range with the 2000 GTV. See below.
Tipo, 1974 on: 115.34. Motore, 1974 on: 00526/A*S.
The GT 1600 Junior was introduced in 1972, to plug the gap between the GT 1300 Junior and the larger-engined 2000 GTV. In the UK right-hand-drive market the GT 1300 Junior was dropped, but in many other markers the two models were available as a range. The engine was substantially the same as that of the Giulia Sprint GTV discontinued four years previously, and had the same engine type number. The final drive ratio was again 9/41 as standard on all 105 Series coupes with the 1290 cc and 1570 cc engine.
From 1974 on, the GT 1300 Junior and GT 1600 Junior were rationalised into a common range of models with the 2000 GTV, sharing most of the interior and exterior features with the larger-engined car. The only exterior differences were no bumper over-riders, lack of C-pillar green serpent badges, and GT 1300 Junior or GT 1600 Junior badge on the boot. Apart from the engine size, the only mechanical differences were: smaller front brakes, as the Juniors had not adopted the larger units fitted to the 1750 GTV and 2000 GTV from 1968 on, differential ratios (Junior models 4.55:1, 2000 GTV 4.1:1) and 5th gear ratio (GT 1300 Junior 0.85:1, all other Alfa Romeo 105 models 0.79:1).
The GT Junior has a tight suspension and weighed in at just 2050 pounds (929.9 kg). Because of this, the car would often go onto three wheels, lifting the inside front wheel off the road when driven enthusiastically.
Production ended in 1976 and totalled 80623 units.
Tipo: 115.24. Motore: 00526*S (1600).
The GT 1300 Junior Zagato was a limited production two seater coupe with aerodynamic bodywork by Zagato of Milan. The model evoked the earlier, race-oriented Giulietta Sprint Zagatos
which featured aluminium bodywork and had a very active competition history. However, the Junior Zagato featured a steel bodyshell with an aluminium bonnet and aluminium doorskins (on the earlier 1300 JZ's). The 1300 JZ was not specifically intended for racing and did not see much use in competition. The 1300 JZ was first seen in public at the Turin Motor Show of 1969. In total 1117 units were constructed of which 2 were destroyed during production because the bodyshells were not within specification. The 1300 was based on the floorpan, driveline and suspension of the 1300 Spider. However, the floorpan was shortened behind the rear wheels to fit the bodyshell and an Alfa Montreal fueltank was fitted. The last 1300 Junior Zagato was produced in 1972 although in 1974 2 more cars were built according to the records.
In 1972 the 1600 Zagato came out of which 402 units were produced. In this case the floorpan was unaltered from the 1600 Spider, so that the normal fueltank could be left in place. As a consequence, the 1600 Zagato is approximately 100 mm (3.9 in) longer than the 1300 JZ. This can be seen at the back were the sloping roofline runs further back and the backpanel is different and lower. The lower part of the rear bumper features a bulge to make room for the spare tire. The 1600 Zagato has numerous differences when compared to the 1300 Junior Zagato. If you ever see two side by side, have a look at the details. The last 1600 Zagato was produced in 1973 and the cars were sold until 1975.
Right hand drive tipo: 105.34.
Motore: 00502/A or 00532/A (identical save for no. prefix.)
The GTA retained the external form of the Giulia Sprint GT, but was constructed with aluminum external panels replacing the standard steel
panels. The 'A' stood for "Alleggerita", Italian for "lightened". The engine was based on that of the standard 1600 cc car with a new, twin-plug head and Weber 45DCOE carburettors. The sump, camshaft cover, timing cover and clutch housing were in lightweight magnesium alloy instead of the standard aluminium alloy. Many other measures were also taken to lighten the car, and tune it for racing. All GTA's had the lower rear wheelarches as fitted to the Giulia Sprint GT's and GTV's, and very early GT 1300 Juniors. The GTA was available from the factory as a high-performance car for the road or racing. Unmodified cars in factory trim have come to be known as "GTA Stradale" but few were sold in this form. Most customers were racers and had them further modified and tuned before delivery by Autodelta
, which had become a wholly owned Alfa Romeo subsidiary running its competition department.
The GTA 1300 Junior (Tipo 105.59) was based on the early step-front GT 1300 Junior, incorporating the same modifications as the GTA. Its engine was not based on the standard 1300 cc motor but was instead a GTA engine with the same bore but a shorter stroke (67.5 instead of 82 mm). Unlike the GTA, the GTA 1300 Junior featured the higher rear wheelarches as first seen on the GT 1300 Junior and later adopted for the 1750 GTV. Once again the GTA 1300 Junior was available as a standard car from Alfa Romeo, but most were modified by Autodelta for racing before delivery.
and was based on the 1750 GTV US version. You had to buy a 1750 GTV at the factory or use an existing car. The car would be shipped to Autodelta and was converted to a GTAm (which was available in various phases of tune). Once again the engine had a special cylinder head with twin spark plugs, but this time the head was to a new design departing significantly from the standard engine in having a much smaller included angle between the valves. The GTAm (1969–1971) could produce up to 240 PS (180 kW; 240 hp) in the 2000 cc car—a car usually related to the GTA, but unlike the GTA derived from the GTV 1750 (US version). The 1750 GTAm (later called 2000 GTAm when the 2000 GTV was introduced) was created in 1969. There are two schools of thought about the "Am" moniker, neither one ever having been officially confirmed by Alfa Romeo: one expands Am to Alleggerita Maggiorata (Italian: lightened enlarged), the other America Maggiorata. Marco Fazio of the Documentazione Storico confirmed on the Spettacolo Sportivo in September 2011 that `America` is the real name. The car had a full steel body modified with aluminium and / or plastic parts. Because of an increased minimum weight in 1971 (up from 920 to 940 kg), the GTAm's had less need for aluminium and / or plastic parts. The base for the GTAm was the 1750 GTV with a SPICA mechanical fuel injection system. The majority of the genuine GTAm's built by Autodelta have a chassisnumber starting with 105.51.XXXXXX. The European market 1750 GTV with dual carburettors from Dell'Orto or Weber carburetor and chassisnumbers starting with 105.44.XXXXXX was also used as a base. The same goes for the 2000 GTV and the 1300 GT Junior bodyshell that was lighter. Note that some racing teams and private workshops ordered the parts from Autodelta and other tuners and assembled the cars themselves on a new or existing bodyshell. The original 1750 engineblock(actually 1779 cc) was used and by inserting a monosleeve instead of four individual cilinderliners, received 1985 cc and later to 1999 cc to participate in the 2000 cc class, explaining the "maggiorata" (enlarged). According to the sources, some 40 GTAm's were built by Autodelta and by private workshops. This number is difficult to verify as the GTAm's didn't have their own specific chassisnumber series. On the forum of the Alfa Romeo Bulletin board (www.alfabb.com) you will find a thread on GTAm chassisnumbers.
Coupé
A coupé or coupe is a closed car body style , the precise definition of which varies from manufacturer to manufacturer, and over time...
s were a range of cars made by the Italian
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...
manufacturer Alfa Romeo
Alfa Romeo
Alfa Romeo Automobiles S.p.A. is an Italian manufacturer of cars. Founded as A.L.F.A. on June 24, 1910, in Milan, the company has been involved in car racing since 1911, and has a reputation for building expensive sports cars...
from 1963 until 1977. They were the successors to the celebrated Giulietta Sprint
Alfa Romeo Giulietta
The Alfa Romeo Giulietta was a subcompact automobile manufactured by the Italian car maker Alfa Romeo from 1954 to 1965. The Giulietta was introduced at the Turin Motor Show in 1954 and almost 132,000 were built in the Portello factory in Milan.The first Giulietta model was a coupé, the Giulietta...
coupé and used a shortened floorpan
Floorpan
The floorpan is a large sheet metal stamping that often incorporates several smaller welded stampings to form the floor of a large vehicle and the position of its external and structural panels....
from the Giulia
Alfa Romeo Giulia
The Alfa Romeo Giulia is an Alfa Romeo automobile. Alfa was one of the first manufacturers to put a powerful engine in a light-weight car for mainstream production. The Giulia weighed about . The car was equipped with a light alloy twin overhead camshaft four-cylinder engine, similar to that of...
Berlina car.
Bodywork
The basic body shapeCar body style
Automobiles' body styles are highly variable. Some body styles remain in production, while others become less common or obsolete. They may or may not correlate to a car's price, size or intended market classification. The same car model might be available in multiple body styles comprising a...
shared by all models was designed by Giorgetto Giugiaro
Giorgetto Giugiaro
Giorgetto Giugiaro is an Italian automobile designer responsible equally for a stable of supercars and several of the most popular everyday vehicles driven today...
for Bertone. It was one of his first major projects for Bertone, and borrowed heavily from his earlier design for the Alfa Romeo 2000 Sprint/2600 Sprint
Alfa Romeo 2600
The Alfa Romeo 2600 was Alfa Romeo´s six-cylinder flagship produced from 1961 to 1968. It was the successor to the Alfa Romeo 2000. It has become historically significant as the last Alfa Romeo to have been fitted with an inline six-cylinder engine having twin overhead camshafts...
. The balance of glass and metal, the influence of the shape of the front and rear glass on the shape of the cabin, and the flat grille with incorporated headlamps were groundbreaking styling features for the era.
A limited production (1000 units) convertible
Convertible
A convertible is a type of automobile in which the roof can retract and fold away having windows which wind-down inside the doors, converting it from an enclosed to an open-air vehicle...
was a modification from the standard car by Touring
Carrozzeria Touring
Carrozzeria Touring is an automobile coachbuilder established on March 25, 1926 in Milan, Italy by Felice Bianchi Anderloni and Gaetano Ponzoni...
of Milan, offered as a catalogue model by Alfa Romeo called the Giulia Sprint GTC.
A small number of the GT Junior models were also built with a very different, aerodynamic two-seater coupe body designed by Ercole Spada
Ercole Spada
Ercole Spada is an Italian automobile designer. His most notable designs were made in the 1960s, for the Zagato design studio house, where Spada was chief stylist...
for Zagato
Zagato
Zagato is a design consultancy and engineering services company situated just outside Milan, Italy.The company's premises occupy an area of , of which are covered....
of Milan. These too were offered by Alfa Romeo as catalogue models, as the GT 1300 Junior Zagato and later GT 1600 Junior Zagato.
Mechanical features
All models feature the four cylinder, all-light-alloy Alfa Romeo Twin Cam engineAlfa Romeo Twin Cam engine
The all alloy Alfa Romeo Twin Cam engine series was an inline-4 cylinder engine produced by Alfa Romeo from 1954 to 1994. For earlier Alfa Romeo engines featuring twin camshafts, refer to the main Alfa Romeo page...
in various cubic capacities from 1290 cc to 1962 cc, all with two valves per cylinder. All versions of this engine fitted to the 105 series coupes featured twin carburettors, except for US market 1750 GTV and 2000 GTV cars which were fitted with fuel injection
Fuel injection
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
. Competition models featured cylinder heads with twin spark plugs. Common to all models was also a 5-speed manual transmission
Manual transmission
A manual transmission, also known as a manual gearbox or standard transmission is a type of transmission used in motor vehicle applications...
and disc brakes on all four wheels. The rear suspension uses a beam axle with coil springs. Air conditioning
Air conditioning
An air conditioner is a home appliance, system, or mechanism designed to dehumidify and extract heat from an area. The cooling is done using a simple refrigeration cycle...
and a limited slip rear differential
Limited slip differential
A limited slip differential is a type of differential gear arrangement that allows for some difference in angular velocity of the output shafts, but imposes a mechanical bound on the disparity...
were optional on the later models.
Models
| Version | Years of production | Units produced |
|---|---|---|
| Sprint GT | from 1963 to 1966 | 21,542 |
| Sprint GTC | from 1964 to 1966 | 1,000 |
| Sprint GTV | from 1965 to 1968 | 14,240 |
| 1750 GTV | from 1968 to 1973 | 44,269 |
| 2000 GTV | from 1971 to 1976 | 37,459 |
| GT 1300 Junior | from 1965 to 1977 | 91,195 |
| GT 1600 Junior | from 1972 to 1976 | 14,299 |
The 105 series coupés featured the GT (Gran Turismo) model description, which was common to all models in one form or another.
The various models in this range can be considered in two broad categories.
On one hand were the various Gran Turismos (GT) and Gran Turismo Veloces (GTV), (veloce is Italian for "fast"). These were meant to be the most sporting cars in the Alfa Romeo range and sold very well to enthusiastic motorists around the world. The first model available was the Giulia Sprint GT (1963) which evolved into the Giulia Sprint GT Veloce (1965), the 1750 GTV (1968) and the 2000 GTV (1972–1976), with engines increasing in cubic capacity from 1570 cc (Giulia Sprint GT/GTV) through 1779 cc (1750 GTV) to 1962 cc (2000 GTV). A limited production (1000 units) convertible
Convertible
A convertible is a type of automobile in which the roof can retract and fold away having windows which wind-down inside the doors, converting it from an enclosed to an open-air vehicle...
, the Giulia Sprint GTC, was based on the Giulia Sprint GT, modified by Touring of Milan. It was only made over two years from 1964 to 1966.
On the other hand was the GT Junior range, which featured engines with smaller cubic capacities. GT Juniors sold in great numbers to people who wanted a sporting, stylish car that handled well, but either did not require the maximum in engine power, or could not afford the taxation on larger engine capacities in some markets - most notably, Alfa Romeo's home Italian market. Junior models began with the first GT 1300 Junior in 1966. The GT 1300 Junior continued until 1976 with the 1290 cc engine and various modifications incorporating features from the evolution of the GT's and GTV's. From 1972 a GT 1600 Junior model was also available, with the 1570 cc engine.
The 1300 Junior and 1600 Junior also became available with a very different, aerodynamic two-seater coupe body designed by Ercole Spada
Ercole Spada
Ercole Spada is an Italian automobile designer. His most notable designs were made in the 1960s, for the Zagato design studio house, where Spada was chief stylist...
for Zagato
Zagato
Zagato is a design consultancy and engineering services company situated just outside Milan, Italy.The company's premises occupy an area of , of which are covered....
of Milan. These models were the GT 1300 Junior Zagato and GT 1600 Junior Zagato.
Both categories were used to derive GTA
Alfa Romeo GTA
The GTA 1300 Junior had a 1300 cc engine that was based on the 1600 engine but with a short stroke crankshaft. The GTA Junior in stradale form did not have many of the light weight features of the 1600 GTA, such as the plastic windows, magnesium engine components and alloy wheels. At start...
("Allegerita", or "lightened") models, which were specifically intended for competition homologation
Homologation
Homologation is a technical term, derived from the Greek homologeo for "to agree", which is generally used in English to signify the granting of approval by an official authority...
in their respective engine size classes. The GTA's featured extensive modifications for racing, so they were priced much higher than the standard models and sold in much smaller numbers. Practically all GTA's made were used in competition, where they had a long and successful history in various classes and category. These models included the Giulia Sprint GTA
Alfa Romeo GTA
The GTA 1300 Junior had a 1300 cc engine that was based on the 1600 engine but with a short stroke crankshaft. The GTA Junior in stradale form did not have many of the light weight features of the 1600 GTA, such as the plastic windows, magnesium engine components and alloy wheels. At start...
, GTA 1300 Junior
Alfa Romeo GTA
The GTA 1300 Junior had a 1300 cc engine that was based on the 1600 engine but with a short stroke crankshaft. The GTA Junior in stradale form did not have many of the light weight features of the 1600 GTA, such as the plastic windows, magnesium engine components and alloy wheels. At start...
, and GTAm
Alfa Romeo GTA
The GTA 1300 Junior had a 1300 cc engine that was based on the 1600 engine but with a short stroke crankshaft. The GTA Junior in stradale form did not have many of the light weight features of the 1600 GTA, such as the plastic windows, magnesium engine components and alloy wheels. At start...
(a much evolved version of the GTA built by Autodelta
Autodelta
Autodelta SpA was the name of Alfa Romeo's competition department. Established in 1961 as Auto-Delta, the company was started by Carlo Chiti, a former Alfa Romeo and Ferrari engineer, and Ludovico Chizzola, an official Alfa Romeo dealer. The team was officially made a department of Alfa Romeo on...
).
Although not commonly thought of as a 105 Series coupe variant, the Alfa Romeo Montreal
Alfa Romeo Montreal
The Alfa Romeo Montreal is a 2+2 coupé automobile produced by the Italian manufacturer Alfa Romeo from 1970 to 1977.-Concept car:The Alfa Romeo Montreal was introduced as a concept car in 1967 at Expo 67, held in Montreal, Canada. Originally, the concept cars were displayed without any model name,...
used a strengthened and slightly modified 105 series floorpan and suspension.
Giulia Sprint GT (1963–1966)
Tipo: 105.02. Motore: 00502.The Giulia Sprint GT was the first model introduced, and was manufactured from 1963 to 1966. It featured the original form of the Bertone body with the scalina (stepped) or "step front" (the leading edge of the hood/bonnet sat 1/4 an inch above the nose of the car). It can be most easily distinguished from other models by the following features:
- Badging: chrome script reading "Giulia Sprint GT" on bootlid, one round Alfa Romeo badge on the grille heart, Bertone badges behind the front wheelarches.
- Flat, chromeChrome platingChrome plating, often referred to simply as chrome, is a technique of electroplating a thin layer of chromium onto a metal object. The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.-Process:A component to be chrome plated will...
grille featuring a plain rectangular mesh with no bars. - Single-piece chrome bumpers
- Dashboard with a flat, tilted panel finished in grey crackle.
The car was fitted with the 1570 cc displacement
Engine displacement
Engine displacement is the volume swept by all the pistons inside the cylinders of an internal combustion engine in a single movement from top dead centre to bottom dead centre . It is commonly specified in cubic centimeters , litres , or cubic inches...
version of the engine (78 mm bore × 82 mm stroke, 6.38 L oil sump, 7.41 L radiator). Dunlop disc brakes were fitted all around. The rear brakes featured an unusual arrangement with the slave cylinders mounted on the axle tubes, operating the calipers by a system of levers and cranks. 31,955 Sprint GTs were produced.
Giulia Sprint GTC (1964–1966)
Tipo: 105.25. Right hand drive tipo: 105.29. Motore: 00502.The Giulia Sprint GTC was a Cabriolet version produced in very limited numbers making them rare today with a total production of 1000 in right and left hand drive versions. Only 99 were made for the British and South African market. The car was based on the Giulia Sprint GT, with the cabriolet modification carried out by Touring of Milan. Besides the cabriolet top, a distinguishing feature is the dashboard finished in black instead of grey crackle. The model was badged with a script reading "Giulia Sprint GTC" on the bootlid.
To restore some of the bodyshell rigidity lost by removing the fixed roof and pillars, Carrozzeria Touring added reinforcement to several areas of the bodyshell. Through the production life of the model, several modifications to the reinforcement applied were made by Touring, apparently in an effort to improve the stiffening achieved.
Carrozzeria Touring was in financial trouble when the Giulia Spring GTC went into production. The company went out of business shortly after production of this model ended.
Giulia Sprint GT Veloce (1965–1968)
Tipo: 105.36. Right hand drive tipo: 105.37. Motore: 00536.The Giulia Sprint GT Veloce was very similar to the original Giulia Sprint GT. It featured minor modifications to the engine, providing just 3 bhp more power, but significantly improved torque. It can be most easily distinguished from other models by the following features:
- Badging as per Giulia Sprint GT, with two additions: Round enamel badges on the C-pillar with a Green quadrifoglio (cloverleaf) on an ivory background, and chrome "Veloce" script on rear panel.
- Grille with black mesh and 3 horizontal chrome bars.
- Dashboard with tilted flat panel as on the Giulia Sprint GT but with imitation woodgrain instead of grey crackle finish (first seen on the GT 1300 Junior).
- Front seats revised to a mild "bucket" design.
- Grille heart has 7 bars instead of 6.
- Stainless steel bumpers, as opposed to the chromed mild steel bumpers on the Giulia Sprint GT. The bumpers are the same shape, but made in two pieces (front) and three pieces (rear) with small covers hiding the joining rivets.
Early Giulia Sprint GT Veloces featured the same Dunlop disc brake system as the Giulia Sprint GT. Later cars replaced this with the ATE disc brakes as pioneered on the GT 1300 Junior in 1966. The ATE brakes featured an interesting and more effective handbrake system on the rear brakes, which incorporated drum brakes inside the disc castings.
A total of 14,240 Giulia Sprint GT Veloces were made before production finished.
1750 GT Veloce (1967–1971)
Tipo: 105.44. Right hand drive tipo: 105.45. Motore: 00548U.S. tipo: 105.51. Motore: 00571.
The 1750 GTV appeared in 1967 along with the 1750 Berlina
Alfa Romeo 1750
The Alfa Romeo 1750/2000 is a medium-priced range of cars presented in 1967 by Alfa Romeo.The 1750 Berlina sedan was introduced in 1967, together with the 1750 GTV coupe and 2000 Spider. The 1750 models replaced the earlier 2600 Berlina, Sprint and Spider at the top of the Alfa Romeo range...
sedan and 1750 Spider
Alfa Romeo Spider
The Alfa Romeo Spider is a roadster produced by the Italian manufacturer Alfa Romeo from 1966 to 1993 . Widely regarded as a design classic, it remained in production for almost three decades with only minor aesthetic and mechanical changes...
. The same type of engine was used to power all three versions; this rationalisation was a first for Alfa Romeo.
The 1750 GTV replaced the Giulia Sprint GT Veloce and introduced many updates and modifications. Most significantly, the engine capacity was increased to 1779 cc displacement (80 mm bore × 88.5 mm stroke, 6.61l oil capacity, 9.58l radiator capacity). Peak power from the engine was increased to 122 PS at 5500 rpm. The stroke was lengthened from 82 to 88.5 mm over the 1600 engine, and a reduced rev limit from 7000 rpm to 6000 rpm. Maximum torque was increased to 186 newton metre at 3000 rpm. A higher ratio final drive was fitted (10/41 instead of 9/41) but the same gearbox ratios were retained. The result was that, on paper, the car had only slightly improved performance compared to the Giulia Sprint GT Veloce, but on the road it was much more flexible to drive and it was easier to maintain higher average speeds for fast touring. For the United States market, the 1779 cc engine was fitted with a fuel injection
Fuel injection
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
system made by Alfa Romeo subsidiary SPICA
SPICA
SPICA S.p.A. was an Italian manufacturer of fuel injection systems.- History :The company was founded by Francesco Cassani in 1932. SPICA fuel injection systems were used in diesel and petrol engines....
, to meet emission control laws that were coming into effect at the time. Fuel injection was also featured on Canadian market cars after 1971. Carburettors were retained for other markets.
The chassis was also significantly modified. Tire size went to 165/14 from 155/15 and wheel size to 5 1/2J x 15 instead of 5J x 15, giving a wider section and slightly smaller rolling diameter. The suspension geometry was also revised, and an anti-roll bar was fitted to the rear suspension. ATE disc brakes were fitted from the outset, but with bigger front discs and calipers than the ones fitted to GT 1300 Juniors and late Giulia Sprint GT Veloces. The changes resulted in significant improvements to the handling and braking, which once again made it easier for the driver to maintain high average speeds for fast touring.
The 1750 GTV also departed significantly from the earlier cars externally. New nose styling eliminated the "stepped" hood of the Giulia Sprint GT, GTC, GTA and early GT 1300 Juniors and incorporated four headlamps. For the 1971 model year, United States market 1750 GTV's also featured larger rear light clusters (there were no 1970 model year Alfas on the US market). Besides the chrome "1750" badge on the bootlid, there was also a round Alfa Romeo badge. Similar Quadrofoglio badges to those on the Giulia Sprint GT Veloce were fitted on C pillars, but the Quadrofoglio was coloured gold instead of green. The car also adopted the higher rear wheelarches first seen on the GT 1300 Junior.
The interior was also much modified over that of earlier cars. There was a new dashboard with large speedometer and tachometer instruments in twin binnacles closer to the driver's line of sight. The instruments were mounted at a more conventional angle, avoiding the reflections caused by the upward angled flat dash of earlier cars. Conversely, auxiliary instruments were moved to angled bezels in the centre console, further from the driver's line of sight than before. The new seats introduced adjustable headrests which merged with the top of the seat when fully down. The window winder levers, the door release levers and the quarterlight vent knobs were also restyled. The remote release for the boot (trunk) lid, located on the inside of the door opening on the B-post just under the door lock striker, was moved from the right hand side of the car to the left hand side. The location of this item was always independent of whether the car was left hand drive or right hand drive.
Early (Series 1) 1750 GTV's featured the same bumpers as the Giulia Sprint GT Veloce, with the front bumper modified to mount the indicator / sidelight units on the top of its corners, or under the bumper on US market cars.
The Series 2 1750 GTV of 1970 introduced other mechanical changes, including a dual circuit braking system (split front and rear, with separate servos). The brake and clutch pedals on left hand drive cars were also of an improved pendant design, instead of the earlier floor-hinged type. On right hand drive cars the floor-hinged pedals were retained, as there was no space for the pedal box behind the carburettors. Externally, the series 2 1750 GTV is identified by new, slimmer bumpers with front and rear overriders. The combined front indicator and sidelight units were now mounted to the front panel instead of the front bumper, except again on the 1971-72 US/Canadian market cars. The interior was slightly modified, with the seats retaining the same basic outline but following a simpler design.
44,269 1750 GTVs were made before their replacement came along.
2000 GT Veloce (1971–1976)
Tipo: 105.21. Right hand drive tipo: 105.22.U.S. tipo: 11501. Motore: 01500.
The 2000 GTV was introduced in 1971 together with the 2000 Berlina
Alfa Romeo 1750
The Alfa Romeo 1750/2000 is a medium-priced range of cars presented in 1967 by Alfa Romeo.The 1750 Berlina sedan was introduced in 1967, together with the 1750 GTV coupe and 2000 Spider. The 1750 models replaced the earlier 2600 Berlina, Sprint and Spider at the top of the Alfa Romeo range...
sedan and 2000 Spider
Alfa Romeo Spider
The Alfa Romeo Spider is a roadster produced by the Italian manufacturer Alfa Romeo from 1966 to 1993 . Widely regarded as a design classic, it remained in production for almost three decades with only minor aesthetic and mechanical changes...
. The 2000 range was the replacement for the 1750 range. Once again the engine was rationalized throughout the range. The engine displacement was increased to 1962 cc with a change of the bore and stroke to 84 mm × 88.5 mm. Oil and radiator capacities remained unchanged. The engine produced 132 PS at 5500 rpm with the SPICA
SPICA
SPICA S.p.A. was an Italian manufacturer of fuel injection systems.- History :The company was founded by Francesco Cassani in 1932. SPICA fuel injection systems were used in diesel and petrol engines....
fuel injection, which, once again, was only fitted to cars destined for the United States and Canadian markets, with carburetors retained for other markets producing 152 PS.
The interior trim was also changed, with the most notable differences being the introduction of a separate instrument cluster, instead of the gauges installed in the dash panel in earlier cars.
- Grille with horizontal chrome bars, featuring protruding blocks forming the familiar Alfa heart in outline.
- Smaller hubcaps with exposed wheel nuts.
- Optional aluminum alloy wheels of the same size as the standard 5. 1/2J × 14 steel items, styled to the "turbina" design first seen on the alloy wheels of the Alfa Romeo MontrealAlfa Romeo MontrealThe Alfa Romeo Montreal is a 2+2 coupé automobile produced by the Italian manufacturer Alfa Romeo from 1970 to 1977.-Concept car:The Alfa Romeo Montreal was introduced as a concept car in 1967 at Expo 67, held in Montreal, Canada. Originally, the concept cars were displayed without any model name,...
. "Turbina" refers to the wheel's resemblance to a jet engine inlet. - The larger rear light clusters first fitted to United States market 1750 GTV's were standard for all markets on the 2000 GTV.
From 1974 on, the 105 Series coupe models were rationalized and these external features became common to post-1974 GT 1300 Junior and GT 1600 Junior models, with only few distinguishing features marking the difference between models. See below.
37,459 2000 GTVs were made before production ended.
GT Junior models
GT 1300 Junior (1965–1977)
Tipo: 105.30. Right hand drive tipo: 105.31. Motore: 00530. Motore, 1974 on: 00530*S.The GT 1300 Junior was the entry model to the Alfa Romeo coupe range. It was introduced in 1965 as the replacement for the 101 series Giulia Sprint 1300
Alfa Romeo Giulia
The Alfa Romeo Giulia is an Alfa Romeo automobile. Alfa was one of the first manufacturers to put a powerful engine in a light-weight car for mainstream production. The Giulia weighed about . The car was equipped with a light alloy twin overhead camshaft four-cylinder engine, similar to that of...
, which was the final development of the Giulietta Sprint
Alfa Romeo Giulietta
The Alfa Romeo Giulietta was a subcompact automobile manufactured by the Italian car maker Alfa Romeo from 1954 to 1965. The Giulietta was introduced at the Turin Motor Show in 1954 and almost 132,000 were built in the Portello factory in Milan.The first Giulietta model was a coupé, the Giulietta...
series.
The GT 1300 Junior was fitted with the 1300 (1290 cc) twin cam
Alfa Romeo Twin Cam engine
The all alloy Alfa Romeo Twin Cam engine series was an inline-4 cylinder engine produced by Alfa Romeo from 1954 to 1994. For earlier Alfa Romeo engines featuring twin camshafts, refer to the main Alfa Romeo page...
engine
Engine
An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...
(74 mm bore × 75 mm stroke), as fitted to the Giulietta series cars, but revised for the 105 series with reduced port sizes and other modifications. The smaller engine was introduced in order to allow buyers to choose an Alfa Romeo coupe while avoiding the higher taxes on the models with larger engine capacity, especially in Alfa Romeo's home Italian market.
The performance was low-end compared to others in its model
Car model
An automobile model is a particular brand of vehicle sold under a marque by a manufacturer, usually within a range of models, usually of different sizes or capabilities...
line, with a total of 89 bhp. However, the GT 1300 Junior's top speed of over 100 mph and 0-60 mph time of 12.6 seconds were very good for a fully appointed coupe with an engine of only 1300 cc displacement.
The GT 1300 Junior was in production for over a decade. Throughout this period it was updated by the factory, incorporating many of the same revisions applied to the larger-engined models.
The first GT 1300 Juniors produced were based on the Giulia Sprint GT, with a simpler interior. The major external identifying feature was the black grille with just one horizontal chrome bar. The same 9/41 final drive ratio was maintained, but with a shorter 5th gear ratio of 0.85, instead of 0.79 as on all the other 105 Series coupes.
Together with the Giulia 1300 Ti
Alfa Romeo Giulia
The Alfa Romeo Giulia is an Alfa Romeo automobile. Alfa was one of the first manufacturers to put a powerful engine in a light-weight car for mainstream production. The Giulia weighed about . The car was equipped with a light alloy twin overhead camshaft four-cylinder engine, similar to that of...
, the GT 1300 Junior pioneered the use of ATE disc brakes as later fitted throughout the 105 series, replacing the Dunlop discs on earlier cars. The first few GT 1300 Juniors lacked a brake servo, and had the low rear wheelarches of the Giulia Sprint GT and Giulia Sprint GTV. From 1967, a servo was fitted as standard, together with higher rear wheelarches as adopted later on the 1750 GTV.
In 1968, concurrently with the replacement of the Giulia Sprint GT Veloce by the 1750 GTV, the GT 1300 Junior was revised with many of the new parts from the 1750 GTV. This included the dashboard, the suspension and the new wheel size of 5½ × 14J instead of 4½ × 15J. This revised GT 1300 Junior, however, retained the early "step-front" body style, which, interestingly, makes it the most mechanically refined production "step-front" model. Another intriguing detail is that, just as on the 1750 GTV, the remote release for the boot (trunk) lid, located on the inside of the door opening on the B-post just under the door lock striker, was moved from the right hand side of the car to the left hand side. The location of this item was always independent of whether the car was left hand drive or right hand drive. This series of GT 1300 Junior was the only model with the step-front bodyshell to have this item mounted on the left hand side. All other step-front models - Giulia Sprint GT, Giulia Sprint GT Veloce, and early GT 1300 Junior with flat dashboard - featured this item on the right hand side.
From 1968 on, Alfa Romeo models for the US market were fitted with fuel injection systems instead of carburettors to comply with emissions control legislation. The only 105 Series models in which the classic twin-cam engine was fitted with fuel injection were the US market 1750 range, and the US market 2000 range which replaced the 1750s in mid-1972. No Alfa Romeo 1300 or 1600cc models were ever made with fuel injection.
In 1970 the Junior was revised a second time, and received the same nose treatment as the 1750 GTV, without the step but with only two headlights.
For 1972, new wheels featuring smaller hubcaps with exposed wheel nuts like those on the 2000 GTV were fitted. At the same time, the GT 1600 Junior was introduced alongside the GT 1300 Junior. The GT 1300 Junior was discontinued for the right hand drive UK market but continued to be available in other right hand drive markets.
From 1974 the GT1300 Junior and GT1600 Junior were both rationalised into a common range with the 2000 GTV. See below.
GT 1600 Junior (1972–1976)
Tipo: 115.03. Right hand drive tipo: 105.05. Motore: 00536.Tipo, 1974 on: 115.34. Motore, 1974 on: 00526/A*S.
The GT 1600 Junior was introduced in 1972, to plug the gap between the GT 1300 Junior and the larger-engined 2000 GTV. In the UK right-hand-drive market the GT 1300 Junior was dropped, but in many other markers the two models were available as a range. The engine was substantially the same as that of the Giulia Sprint GTV discontinued four years previously, and had the same engine type number. The final drive ratio was again 9/41 as standard on all 105 Series coupes with the 1290 cc and 1570 cc engine.
From 1974 on, the GT 1300 Junior and GT 1600 Junior were rationalised into a common range of models with the 2000 GTV, sharing most of the interior and exterior features with the larger-engined car. The only exterior differences were no bumper over-riders, lack of C-pillar green serpent badges, and GT 1300 Junior or GT 1600 Junior badge on the boot. Apart from the engine size, the only mechanical differences were: smaller front brakes, as the Juniors had not adopted the larger units fitted to the 1750 GTV and 2000 GTV from 1968 on, differential ratios (Junior models 4.55:1, 2000 GTV 4.1:1) and 5th gear ratio (GT 1300 Junior 0.85:1, all other Alfa Romeo 105 models 0.79:1).
The GT Junior has a tight suspension and weighed in at just 2050 pounds (929.9 kg). Because of this, the car would often go onto three wheels, lifting the inside front wheel off the road when driven enthusiastically.
Production ended in 1976 and totalled 80623 units.
GT 1300 Junior Zagato (1969-72) & GT1600 Junior Zagato (1972-76)
Tipo: 105.93. Motore: 00530. (1300).Tipo: 115.24. Motore: 00526*S (1600).
Alfa Romeo Giulietta
The Alfa Romeo Giulietta was a subcompact automobile manufactured by the Italian car maker Alfa Romeo from 1954 to 1965. The Giulietta was introduced at the Turin Motor Show in 1954 and almost 132,000 were built in the Portello factory in Milan.The first Giulietta model was a coupé, the Giulietta...
which featured aluminium bodywork and had a very active competition history. However, the Junior Zagato featured a steel bodyshell with an aluminium bonnet and aluminium doorskins (on the earlier 1300 JZ's). The 1300 JZ was not specifically intended for racing and did not see much use in competition. The 1300 JZ was first seen in public at the Turin Motor Show of 1969. In total 1117 units were constructed of which 2 were destroyed during production because the bodyshells were not within specification. The 1300 was based on the floorpan, driveline and suspension of the 1300 Spider. However, the floorpan was shortened behind the rear wheels to fit the bodyshell and an Alfa Montreal fueltank was fitted. The last 1300 Junior Zagato was produced in 1972 although in 1974 2 more cars were built according to the records.
In 1972 the 1600 Zagato came out of which 402 units were produced. In this case the floorpan was unaltered from the 1600 Spider, so that the normal fueltank could be left in place. As a consequence, the 1600 Zagato is approximately 100 mm (3.9 in) longer than the 1300 JZ. This can be seen at the back were the sloping roofline runs further back and the backpanel is different and lower. The lower part of the rear bumper features a bulge to make room for the spare tire. The 1600 Zagato has numerous differences when compared to the 1300 Junior Zagato. If you ever see two side by side, have a look at the details. The last 1600 Zagato was produced in 1973 and the cars were sold until 1975.
Giulia Sprint GTA (1965–1969)
Tipo: 105.32 (Alfa Romeo), 105.02/A (IGM homologation).Right hand drive tipo: 105.34.
Motore: 00502/A or 00532/A (identical save for no. prefix.)
Steel
Steel is an alloy that consists mostly of iron and has a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten...
panels. The 'A' stood for "Alleggerita", Italian for "lightened". The engine was based on that of the standard 1600 cc car with a new, twin-plug head and Weber 45DCOE carburettors. The sump, camshaft cover, timing cover and clutch housing were in lightweight magnesium alloy instead of the standard aluminium alloy. Many other measures were also taken to lighten the car, and tune it for racing. All GTA's had the lower rear wheelarches as fitted to the Giulia Sprint GT's and GTV's, and very early GT 1300 Juniors. The GTA was available from the factory as a high-performance car for the road or racing. Unmodified cars in factory trim have come to be known as "GTA Stradale" but few were sold in this form. Most customers were racers and had them further modified and tuned before delivery by Autodelta
Autodelta
Autodelta SpA was the name of Alfa Romeo's competition department. Established in 1961 as Auto-Delta, the company was started by Carlo Chiti, a former Alfa Romeo and Ferrari engineer, and Ludovico Chizzola, an official Alfa Romeo dealer. The team was officially made a department of Alfa Romeo on...
, which had become a wholly owned Alfa Romeo subsidiary running its competition department.
GTA 1300 Junior (1968–1973)
Tipo: 105.59. Motore: 00559.The GTA 1300 Junior (Tipo 105.59) was based on the early step-front GT 1300 Junior, incorporating the same modifications as the GTA. Its engine was not based on the standard 1300 cc motor but was instead a GTA engine with the same bore but a shorter stroke (67.5 instead of 82 mm). Unlike the GTA, the GTA 1300 Junior featured the higher rear wheelarches as first seen on the GT 1300 Junior and later adopted for the 1750 GTV. Once again the GTA 1300 Junior was available as a standard car from Alfa Romeo, but most were modified by Autodelta for racing before delivery.
GTAm
Unlike the Giulia Sprint GTA and GTA 1300 Junior, The GTAm was not built by Alfa Romeo, was never available from the factory and was never issued its own Tipo number. It was built by AutodeltaAutodelta
Autodelta SpA was the name of Alfa Romeo's competition department. Established in 1961 as Auto-Delta, the company was started by Carlo Chiti, a former Alfa Romeo and Ferrari engineer, and Ludovico Chizzola, an official Alfa Romeo dealer. The team was officially made a department of Alfa Romeo on...
and was based on the 1750 GTV US version. You had to buy a 1750 GTV at the factory or use an existing car. The car would be shipped to Autodelta and was converted to a GTAm (which was available in various phases of tune). Once again the engine had a special cylinder head with twin spark plugs, but this time the head was to a new design departing significantly from the standard engine in having a much smaller included angle between the valves. The GTAm (1969–1971) could produce up to 240 PS (180 kW; 240 hp) in the 2000 cc car—a car usually related to the GTA, but unlike the GTA derived from the GTV 1750 (US version). The 1750 GTAm (later called 2000 GTAm when the 2000 GTV was introduced) was created in 1969. There are two schools of thought about the "Am" moniker, neither one ever having been officially confirmed by Alfa Romeo: one expands Am to Alleggerita Maggiorata (Italian: lightened enlarged), the other America Maggiorata. Marco Fazio of the Documentazione Storico confirmed on the Spettacolo Sportivo in September 2011 that `America` is the real name. The car had a full steel body modified with aluminium and / or plastic parts. Because of an increased minimum weight in 1971 (up from 920 to 940 kg), the GTAm's had less need for aluminium and / or plastic parts. The base for the GTAm was the 1750 GTV with a SPICA mechanical fuel injection system. The majority of the genuine GTAm's built by Autodelta have a chassisnumber starting with 105.51.XXXXXX. The European market 1750 GTV with dual carburettors from Dell'Orto or Weber carburetor and chassisnumbers starting with 105.44.XXXXXX was also used as a base. The same goes for the 2000 GTV and the 1300 GT Junior bodyshell that was lighter. Note that some racing teams and private workshops ordered the parts from Autodelta and other tuners and assembled the cars themselves on a new or existing bodyshell. The original 1750 engineblock(actually 1779 cc) was used and by inserting a monosleeve instead of four individual cilinderliners, received 1985 cc and later to 1999 cc to participate in the 2000 cc class, explaining the "maggiorata" (enlarged). According to the sources, some 40 GTAm's were built by Autodelta and by private workshops. This number is difficult to verify as the GTAm's didn't have their own specific chassisnumber series. On the forum of the Alfa Romeo Bulletin board (www.alfabb.com) you will find a thread on GTAm chassisnumbers.