Mercedes-Benz M103 engine
| Mercedes-Benz M103 engine | |
|---|---|
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1984–1997 |
| Layout | |
| Configuration | Naturally aspirated Inline-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 "heart shaped" to a "HEMI" spherical combustion chamber.