Mercedes-Benz M123 engine
| Mercedes-Benz M123 | |
|---|---|
M123.920 engine | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1976–1984 |
| Layout | |
| Configuration | Naturally aspirated Straight-6 |
| Displacement | 2.5 L (2,525 cc) |
| Cylinder bore | 86 mm (3.39 in) |
| Piston stroke | 72.45 mm (2.85 in) |
| Valvetrain | SOHC |
| Combustion | |
| Fuel system | Solex 4A1 carburetor |
| Fuel type | Petrol |
| Cooling system | Water cooled |
| Output | |
| Power output | 95–104 kW (129–141 PS; 127–139 hp) |
| Torque output | 196–200 N⋅m (145–148 lb⋅ft) |
| Chronology | |
| Predecessor | M180 |
| Successor | M103 |
The M123 is a family of 2.5 L (2,525 cc) straight-6 overhead cam Mercedes-Benz automobile engines developed for its new W123 range, and used from 1976 to 1984 on the 250 and 250 T models. Employing natural aspiration and a 4-barrel carburetor, it replaced the 6-cylinder engines M180 in the 230 and M130 in the 250 (2.8 liter) versions derived from the W114 series.
The M123 was succeeded by the M103, introduced in 1984 with the W124 series.