Nysa S-21, Engine
| Engine capacity | 2,120 cm³ |
| Maximum power (range), hp | 70 - 77 |
| Maximum torque, N*m (kg*m) at rpm. | 150 (15) / 2500 |
| Fuel used | Petrol |
| Fuel consumption, l/100 km | 13.5 - 14 |
| Engine type | In-line, 4-cylinder |
| Additional engine information | Carburetor |
| Maximum power, hp (kW) at rpm | 70 (51) / 4000 |
| Compression Ratio (Range) | 7.5 |
| Cylinder diameter (range), mm | 82 |
| Piston stroke (range), mm | 100 |
| Valve drive | SOHC |
| Number of valves per cylinder (range) | 2 |