Opel 25DM, 25DG, Engine
| Engine capacity | 2,499 cm³ |
| Maximum power (range), hp | 75 |
| Maximum torque, N*m (kg*m) at rpm. | 158 (16) / 2200 |
| Fuel used | Diesel fuel |
| Fuel consumption, l/100 km | 10.1 |
| Engine type | In-line, 4-cylinder |
| Maximum power, hp (kW) at rpm | 75 (55) / 4000 |
| Compression Ratio (Range) | 22 |
| Cylinder diameter (range), mm | 93 |
| Piston stroke (range), mm | 92 |
| Valve drive | OHC |
| Number of valves per cylinder (range) | 2 |