NSU 2.5 Hp (1903-05) vs NSU 201 ZBD (1938-40)
Comparison technical specifications
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| Make: | NSU | NSU |
| Model: | 2.5 Hp | 201 ZBD |
| Years: | 1903-05 | 1938-40 |
| Engine: | Single cylinder, 4 stroke | Single cylinder, two stroke. |
| Capacity: | 331 cc / 20.2 cub in | 198 cc / 12.1 cub in |
| Cooling: | Air cooled | Air/Oil cooled |
| Ignition: | Magneto | Magneto |
| Max Power: | 1.8 kW / 2.5 hp @ 2000 rpm | 5.1 kW / 7 hp @ 4000 rpm |
| Final Drive: | Chain | Chain in oil bath |
| Frame: | Steel, integrated open frame with engine as integral component | Steel, double pipe |
| Top Speed: | 50 km/h / 31 mph | 75 km/h / 46.6 mph |