Fiat 138 B6.000, Engine
| Engine capacity | 1,698 cm³ |
| Maximum power (range), hp | 58 |
| Maximum torque, N*m (kg*m) at rpm. | 100 (10) / 2900 |
| Fuel used | Diesel fuel |
| Fuel consumption, l/100 km | 6.8 |
| Engine type | In-line, 4-cylinder |
| Maximum power, hp (kW) at rpm | 58 (43) / 4600 |
| Valve drive | SOHC |
| Number of valves per cylinder (range) | 2 |