| Mercedes-Benz OM621 | |
|---|---|
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 1956–1968 |
| Layout | |
| Configuration | Inline-four engine |
| Displacement |
|
| Cylinder bore | 85–87 mm (3.35–3.43 in) |
| Piston stroke | 83.6 mm (3.29 in) |
| Cylinder block material | Cast Iron |
| Cylinder head material | Cast Iron |
| Valvetrain | SOHC |
| Compression ratio | 18.0:1 |
| Combustion | |
| Fuel system | Indirect injection |
| Fuel type | Diesel |
| Cooling system | Water cooled |
| Output | |
| Power output | 35–40 kW (47–54 hp) |
| Torque output | 108–118 N⋅m (80–87 lb⋅ft) |
| Chronology | |
| Predecessor | Mercedes-Benz OM636 engine |
| Successor | Mercedes-Benz OM615 engine |
The OM621 is an inline-four diesel engine produced by Mercedes-Benz, from 1956 to 1968. It was succeeded by the OM615 engine.