BMW N55
Encyclopedia
The N55 is a turbocharged straight-6
automobile
engine from BMW
. It was launched in early 2009 in the new BMW 5-Series Gran Turismo in the BMW 535i GT model. It is BMW's first production single turbocharged gasoline engine that combines the use of Valvetronic
, turbocharging, Cylinder-bank Comprehensive Manifold (CCM), and direct injection
technologies.
The N55 was the first engine to receive the BMW TwinPower Turbo brand name, although it actually uses a single turbocharger, with twin scroll Cylinder-bank Comprehensive Manifold (CCM) technology taking in exhaust pulses from two groups of 3 cylinders. Valvetronic is used to help reduce throttle losses. BMW has also retroactively applied the "Twin Turbo" moniker to earlier engines such as the N54
straight-6 and N63
V8 which have twin turbochargers but not twin scroll technology. The S63 V8 (the high-performance M derivative of the N63) and N74
V12 have twin turbochargers and twin scroll technology.
The N55 has replaced the N54 in many applications as well as supplanting the high output versions of the N52B30. The preceding N54
was a twin-turbocharged straight-6
with direct injection
technology that did not use Valvetronic. The N55 has reduced emissions and fuel consumption in keeping with BMW's Efficient Dynamics initiative.
The N55 is mated to ZF's new 8-speed automatic transmission with Steptronic in most applications, though the 2011 BMW 3-Series will instead use the 6-speed automatic with Steptronic, and a 6-speed manual is usually available for cars (sedans, coupes, wagons) but not crossover SUVs.
Applications:
Straight-6
The straight-six engine or inline-six engine is a six-cylinder internal combustion engine with all six cylinders mounted in a straight line along the crankcase...
automobile
Automobile
An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...
engine from BMW
BMW
Bayerische Motoren Werke AG is a German automobile, motorcycle and engine manufacturing company founded in 1916. It also owns and produces the Mini marque, and is the parent company of Rolls-Royce Motor Cars. BMW produces motorcycles under BMW Motorrad and Husqvarna brands...
. It was launched in early 2009 in the new BMW 5-Series Gran Turismo in the BMW 535i GT model. It is BMW's first production single turbocharged gasoline engine that combines the use of Valvetronic
Valvetronic
The Valvetronic system is a variable valve timing system to offer continuous and precisely variable intake valve lift, from ~0 to 10 mm, and duration. It typically works in conjunction with the independent Double VANOS system that continuously varies the timing...
, turbocharging, Cylinder-bank Comprehensive Manifold (CCM), and direct injection
Gasoline direct injection
In internal combustion engines, gasoline direct injection , also known as petrol direct injection or direct petrol injection, is a variant of fuel injection employed in modern two-stroke and four-stroke gasoline engines...
technologies.
| Engine | Displacement | Power | Torque | Redline | Year |
|---|---|---|---|---|---|
| N55B30 | 3.0 L (2979 cc/181 in³) | 225 kW (300 hp) @ 5800 | 400 N·m (300 ft·lbf) @ 1200-5000 | 7000 rpm | 2009 |
| N55B30 | 3.0 L (2979 cc/181 in³) | 225 kW (315 hp) @ 5800 | 400 N·m (330 ft·lbf) @ 1200-5000 | 7000 rpm | 2011 |
The N55 was the first engine to receive the BMW TwinPower Turbo brand name, although it actually uses a single turbocharger, with twin scroll Cylinder-bank Comprehensive Manifold (CCM) technology taking in exhaust pulses from two groups of 3 cylinders. Valvetronic is used to help reduce throttle losses. BMW has also retroactively applied the "Twin Turbo" moniker to earlier engines such as the N54
BMW N54
The N54 is a direct injection twin-turbocharged straight-6 automobile engine from BMW. It was launched in late 2006 as a high-performance option for the BMW 3-Series, first to be released along with the new 3-series E92 Coupé, to be followed closely by other existing 3-series models, then with...
straight-6 and N63
BMW N63
The N63 is a family of 4.4L, direct-injected, twin-turbocharged V8 automobile engines produced by BMW since 2008.-Specifications:The N63B44 features a reverse-flow air design in which the turbochargers are mounted in the engine valley and the intake manifolds are located on the sides of the block...
V8 which have twin turbochargers but not twin scroll technology. The S63 V8 (the high-performance M derivative of the N63) and N74
BMW N74
The N74 a V12 engine built by BMW in Munich, Germany. As of 2009 it is the company's flagship engine in the 7-Series, only being offered in the Li long wheelbase variant....
V12 have twin turbochargers and twin scroll technology.
The N55 has replaced the N54 in many applications as well as supplanting the high output versions of the N52B30. The preceding N54
BMW N54
The N54 is a direct injection twin-turbocharged straight-6 automobile engine from BMW. It was launched in late 2006 as a high-performance option for the BMW 3-Series, first to be released along with the new 3-series E92 Coupé, to be followed closely by other existing 3-series models, then with...
was a twin-turbocharged straight-6
Straight-6
The straight-six engine or inline-six engine is a six-cylinder internal combustion engine with all six cylinders mounted in a straight line along the crankcase...
with direct injection
Gasoline direct injection
In internal combustion engines, gasoline direct injection , also known as petrol direct injection or direct petrol injection, is a variant of fuel injection employed in modern two-stroke and four-stroke gasoline engines...
technology that did not use Valvetronic. The N55 has reduced emissions and fuel consumption in keeping with BMW's Efficient Dynamics initiative.
The N55 is mated to ZF's new 8-speed automatic transmission with Steptronic in most applications, though the 2011 BMW 3-Series will instead use the 6-speed automatic with Steptronic, and a 6-speed manual is usually available for cars (sedans, coupes, wagons) but not crossover SUVs.
Applications:
- 2010– BMW 535i GTBMW 5 Series Gran TurismoThe BMW 5 Series Gran Turismo is an executive or mid-size car from German manufacturer BMW, which was first displayed at the 2009 Geneva Motor Show as a concept car...
, BMW 535i - 2011– BMW 335i Coupé, BMW 335i SedanBMW E90The saloon model was the first model sold of the 5th generation BMW 3 series. Debuting in the US in 2006, the E90 came in two trims, the 325i/xi and 330i/xi models...
, BMW X5 xDrive 35i, BMW X6 xDrive 35i, BMW 535i, BMW 135i, BMW X3 xDrive35i - 2012– BMW 640i Coupé