Mercedes-Benz M102 engine

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Mercedes-Benz M102 engine
Overview
Manufacturer	Mercedes-Benz
Production	1980–1993
Layout
Configuration	Straight-4
Displacement	1.8 L (1,797 cc) 2.0 L (1,997 cc) 2.3 L (2,299 cc) 2.5 L (2,498 cc) 2.5 L (2,463 cc)
Cylinder bore	89 mm (3.504 in) 95.5 mm (3.760 in) 97.3 mm (3.831 in)
Piston stroke	72.2 mm (2.843 in) 80.25 mm (3.159 in) 87.2 mm (3.433 in) 82.8 mm (3.260 in)
Valvetrain	SOHC 2 valves per cylinder DOHC 4 valves per cylinder
Compression ratio	10.5:1
Combustion
Fuel system	175 CDT Carburetor Multi-point fuel injection
Management	Bosch KE-Jetronic
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	63–173 kW (86–235 PS; 84–232 bhp)
Torque output	154–245 N⋅m (114–181 lb⋅ft)
Dimensions
Dry weight	118 kg (260 lb)
Chronology
Predecessor	Mercedes-Benz M115 engine
Successor	Mercedes-Benz M111 engine

The M102 engine family is a inline-four gasoline automobile engine family built by Mercedes-Benz in the 1980s and early 1990s. It is a relatively oversquare engine with a large bore and short stroke compared to the M115 engine which was used during the same timeframe.