Mercedes-Benz M102 engine

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The M102 engine family was a straight-4 gasoline automobile engine from Mercedes-Benz in the 1980s and early 1990s. It is a relatively oversquare engine with a large bore and short stroke. Compare to the M115 engine which was used during the same time frame.

M102.910[edit]

Used in the W201 190E 1.8 from 1990 onwards (badged as 180E in Australia from 1991 to 1993). Cubic capacity: 1797cc Power output: 80 kW Torque: 154Nm

Applications:

M102.920[edit]

The M102.920 was a 2.0 L engine with an 89 mm bore and 80.25 mm stroke. Equipped w/ carburettor 175 CDT. Cubic capacity: 1997cc Power output: 80 kW.

Applications:

M102.921[edit]

Similar to M102.920, but less power due to a different camshaft and different carburettor. Power Output: 66 kW

Applications:

M102.922[edit]

An update of the M102.920 engine for use in the W124 chassis Cubic capacity: 1997cc Power output: 80 kW

Applications:

M102.924[edit]

Similar to M102.921, different carburettor, single-belt drive for alternator, power steering pump and air-conditioning compressor (where fitted). Hydraulic aided valvetrain. Power output: 77 kW

Application

M102.938[edit]

Low compression version of M102.921 Power output: 63 kW

Application

M102.939[edit]

Low compression version of M102.920 Power output: 74 kW

Application

M102.961[edit]

A 2.0L multi-point fuel-injected (KE-Jetronic) variation of the M102.921. An "E" was added to the model of the vehicle (standing for "einspritzung", the German word for fuel injection). This engine is identified by TSZ ignition and multiple belts for the alternator, power steering and air conditioning compressor (where fitted). Cubic capacity: 1997cc Power output: 90 kW

Application

M102.962[edit]

An update to the M102.961 introduced in 1985, with a power output of about 122 bhp. This is identified by the EZL ignition system and a single accessory drive belt. Cubic capacity: 1997cc Power output: 87 kW

Applications:

M102.963[edit]

2.0 litre version with KE-Jetronic fuel injection. Cubic capacity: 1997cc Power output: 90 kW

Applications:

M102.980[edit]

The M102.980 was a 2.3 L 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 fuel injection. Cubic capacity: 2299cc Power output: 100 kW

Applications:

M102.981[edit]

The M102.981 was a 2.3 L version with a 95.5 mm bore and the same 80.25 mm stroke. Cubic capacity: 2299cc Power output: 92 kW

Applications:

M102.982[edit]

Much resemblant to the M102.980 version, but modified slightly with a newer KE-Jetronic system from Bosch. Cubic capacity: 2299cc Power output: 97 kW

Applications:

M102.983[edit]

A 16-valve version of the M102.985 with cylinder head designed by Cosworth. Cubic capacity: 2299cc Power output: 138 kW (USA: 125 kW)

Applications:

M102.985[edit]

An 8-valve M102 with a displacement of 2.3L used in the W201 chassis with KE-Jetronic fuel injection. Cubic capacity: 2299cc Power output: 97 kW

Applications:

M102.990[edit]

An update of the 16-valve version with increased capacity (2.5L) and stiffening ribs , still with a cylinder head designed by Cosworth. Cubic capacity: 2498cc Power output: 150 kW

Applications:

M102.991[edit]

An update of the 2.5 16-valve version, with shorter stroke and larger bore. H beam rods and piston cooling jets. Cubic capacity: 2498cc Power output: 147 kW

Applications:

M102.992[edit]

An update of the 102.991 version with removal of four crankshaft counterweights and even more stiffening ribs for higher RPMs. Single timing chain, Oil pump with separate drive chain. Bigger Intake manifold, camshaft and exhaust system. Higher compression ratio 10,5:1. Cubic capacity: 2463cc Power output: 170 kW

Applications:

See also[edit]

External links[edit]