Mercedes-Benz M102 engine
Encyclopedia
The M102 engine family was a straight-4
Straight-4
The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....

 gasoline automobile engine from Mercedes-Benz
Mercedes-Benz
Mercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...

 in the 1980s and early 1990s. It is a relatively oversquare
Stroke ratio
In a reciprocating piston engine, the stroke ratio, defined by either bore/stroke ratio or stroke/bore ratio, is a term which is used to describe the ratio between the diameter of the cylinder bore and the length of the piston stroke within its cylinders...

 engine with a large bore and short stroke. Compare to the M115
Mercedes-Benz M115 engine
The M115 engine family was a straight-4 automobile engine from Mercedes-Benz in the 1970s. The same engine was produced in several versions with differing volume, compression, and horse power according to its application.-M115.920:...

 engine which was used during the same time frame.

M102.910

Used in the W201 190E 1.8 from 1990 onwards, as well as the limited edition W201 180E model only sold in Australia from 1991 to 1993.
Cubic capacity: 1797cc
Power: 82kW
Torque: 154Nm

Applications:
  • 1990-1993 180E and 190E 1.8
    Mercedes-Benz W201
    The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982–1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate....


M102.920

The M102.920 was a 2.0 L (1997 cc) engine with an 89 mm bore and 80.25 mm stroke. Power output was 109 hp (81 kW).

Equipped w/ carburettor 175 CDT

Applications:
  • 1980-1986 200
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...

  • 1980-1986 200T
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...


M102.921

Similar to M102.920, but less power output due to a different camshaft and different carburettor.

Applications:
  • 1983-1993 190
    Mercedes-Benz W201
    The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982–1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate....


M102.924

Similar to M102.920, different carburettor, new single-belt drive for generator. Hydraulic aided valvedrive.

Application
  • 200
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...

  • 190
    Mercedes-Benz W201
    The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982–1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate....


M102.962

A later multi-point fuel-injected variation of the M102.921 that was introduced in 1987, with a power output of about 122 bhp. An "E" was added to the model of the vehicle (standing for "einspritzung", the German word for fuel injection).

Applications:
  • 1983-1993 190E
    Mercedes-Benz W201
    The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982–1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate....


M102.963

2.0 litre version with KE-Jetronic fuel injection.

KE-Jetronic (1985-1993) : Electronically controlled mechanical fuel injection. The Engine Control Unit (ECU) may be either analog or digital, and the system may or may not have closed-loop lambda control. Commonly known as 'CIS-E' in the USA. The later KE3 (CIS-E III) variant features knock sensing capabilities.

Applications:
  • 1990 200E
    Mercedes-Benz W124
    W124 is the Mercedes-Benz internal chassis-designation for the 1985 to 1995 version of the Mercedes-Benz E-Class. The W124 models replaced the W123 models after 1985 and were superseded by the W210 E-Class after 1995.-History:...


M102.980

The M102.980 was a 2.3 L (2299 cc) version with a 95.5 mm bore and the same 80.25 mm stroke. Power output was 136 hp (100 kW). Engine weight was 118 kg.
Used K-jetronic
Jetronic
Jetronic is a trade name of an fuel injection technology for automotive petrol engines, developed and marketed by Robert Bosch GmbH from the 1960s onwards. Bosch licensed the concept to many automobile manufacturers. There are several variations of the technology offering technological development...

 fuel injection.

Applications:
  • 1980-1986 230E
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...

  • 1980-1986 230CE
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...

  • 1980-1986 230TE
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...


M102.981

The M102.981 was a 2.3 L (2299 cc) version with a 95.5 mm bore and the same 80.25 mm stroke. Power output was 125 hp (92 kW).

Applications:
  • 1979-1989 230GE Geländewagen
    Mercedes-Benz G-Class
    The original 460-series Geländewagen went on sale for civilian buyers in 1979, after having debuted in February of that year. It was offered with two wheelbases, a short wheelbase of 2,400 mm and a long one of 2,850 mm. One could choose between three body styles: A two-door short...


M102.982

The same prototype as the M102.981 version, except for the increased amount of horsepower and torque. Much resemblant to the M102.980 version, which was modified slightly with a newer jetronic
Jetronic
Jetronic is a trade name of an fuel injection technology for automotive petrol engines, developed and marketed by Robert Bosch GmbH from the 1960s onwards. Bosch licensed the concept to many automobile manufacturers. There are several variations of the technology offering technological development...

 system from BOSCH
Bosch
Bosch is a popular surname in Catalan and Dutch; it means forest. It may refer to:Buildings:*Huis ten Bosch, an official palace of the Dutch Royal Family in The Hague, Netherlands*Bosch Palace, the official residence of the U.S...

.

Applications:
  • All E-Classed W124 stock models (200E-230E) that were produced from 1990-1995.

M102.985

A later multi-point fuel-injected M102 with a displacement of 2.3 L. Used KE-jetronic
Jetronic
Jetronic is a trade name of an fuel injection technology for automotive petrol engines, developed and marketed by Robert Bosch GmbH from the 1960s onwards. Bosch licensed the concept to many automobile manufacturers. There are several variations of the technology offering technological development...

 fuel injection.

Applications:
  • 1986-1992 230E
    Mercedes-Benz W124
    W124 is the Mercedes-Benz internal chassis-designation for the 1985 to 1995 version of the Mercedes-Benz E-Class. The W124 models replaced the W123 models after 1985 and were superseded by the W210 E-Class after 1995.-History:...

  • 1986-1992 230CE
    Mercedes-Benz W124
    W124 is the Mercedes-Benz internal chassis-designation for the 1985 to 1995 version of the Mercedes-Benz E-Class. The W124 models replaced the W123 models after 1985 and were superseded by the W210 E-Class after 1995.-History:...

  • 1986-1992 230TE
    Mercedes-Benz W124
    W124 is the Mercedes-Benz internal chassis-designation for the 1985 to 1995 version of the Mercedes-Benz E-Class. The W124 models replaced the W123 models after 1985 and were superseded by the W210 E-Class after 1995.-History:...

  • 1985-1992 190 E 2.3
    Mercedes-Benz W201
    The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982–1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate....


Cosworth conversions

Cosworth
Cosworth
Cosworth is a high performance engineering company founded in London in 1958, specialising in engines and electronics for automobile racing , mainstream automotive and defence industries...

 developed an M102 2.3-litre variant with a 16-valve cylinder head for use in the 190E 2.3-16
Mercedes-Benz W201
The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982–1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate....

. The 2.5-litre engine in the later 190E 2.5-16
Mercedes-Benz W201
The Mercedes-Benz W201 is a compact executive car manufactured by Mercedes-Benz from 1982–1993, positioned below the Mercedes-Benz E-Class and S-Class — and marketed under variants of the Mercedes 190 nameplate....

 was based on this same engine.

See also

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