The examples and perspective in this article may not represent a worldwide view of the subject. (December 2010) |
Mercedes-Benz M103 engine | |
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Overview | |
Manufacturer | Mercedes-Benz |
Production | 1984–1997 |
Layout | |
Configuration | Naturally aspirated Straight-6 |
Displacement | 158.6 cu in (2,599 cc) 180.8 cu in (2,962 cc) |
Cylinder bore | 82.9 mm (3.264 in) 88.5 mm (3.484 in) |
Piston stroke | 80.25 mm (3.159 in) |
Valvetrain | SOHC / 2 valves x cyl. |
Compression ratio | 9.2:1 |
RPM range | |
Max. engine speed | 6200 |
Combustion | |
Fuel system | Continuous Injection System - Electronic |
Fuel type | Gasoline |
Oil system | Wet sump |
Cooling system | Water cooled |
Output | |
Power output | 118–140 kW (160–190 PS; 158–188 hp) |
Torque output | 220–260 N⋅m (162–192 lb⋅ft) |
Chronology | |
Predecessor | M110 & M123 |
Successor | M104 |
The Mercedes-Benz M103 is a straight-6 15 degrees, crossflow cylinder head with an inclination to the right, automobile engine produced from 1984 to 1997. It is a single overhead cam design with 2 valves per cylinder. The M103 was replaced by the M104 starting in 1989. This engine received several updates over the years of production, one of the updates was a change from a spherical combustion chamber to a "heart shaped" combustion chamber.