Audi RU, Engine
| Engine capacity | 1,781 cm³ |
| Maximum power (range), hp | 75 |
| Maximum torque, N*m (kg*m) at rpm. | 140 (14) / 2500 |
| Fuel used | Gasoline AI-92 |
| Fuel consumption, l/100 km | 7.7 |
| Engine type | In-line, 4-cylinder |
| Additional engine information | Carburetor |
| Maximum power, hp (kW) at rpm | 75 (55) / 4500 |
| Compression Ratio (Range) | 9 |
| Cylinder diameter (range), mm | 81 |
| Piston stroke (range), mm | 86.4 |
| Valve drive | SOHC |
| Number of valves per cylinder (range) | 2 |