Comparison of Aermacchi H-D Wisconsin 1966 and NSU 251 OSL WH 1941 [S]ave
| Attribute |  Aermacchi H-D Wisconsin 1966 × |  NSU 251 OSL WH 1941 × |
|---|---|---|
| General | ||
| Production from (year) | 1966 | 1941 |
| Make | Aermacchi | NSU |
| Model | Aermacchi H-D Wisconsin | NSU 251 OSL WH |
| Category | Sport | Allround |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor | Carburettor. Amal |
| Displacement (cm³) | 246.2 | 242 |
| Power (kw) | 11.7 | 7.7 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | - |
| Bore (mm) | 66 | 64 |
| Stroke (mm) | 72 | 75 |
| Ignition | Bobine | - |
| Clutch | Wet multiplate | - |
| Compression | 8.5:1 | - |
| Chassis | ||
| Front suspension | Telescopic | - |
| Rear suspension | Two shock | - |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | Single cradle | Steel |
| Front tyre | 2.50-17 | 3-19 |
| Rear tyre | 3-17 | 3-19 |
| Seat | - | Single |
| Wheels | Spoked | Spoked |
| Other | ||
| Starter | Kick | - |
| Dimensions | ||
| Dry weight (kg) | 115 | 144 |
| Power/weight ratio | 0.1017 | 0.0535 |
| Overall height (mm) | 980 | 950 |
| Overall length (mm) | 1,970 | 2,040 |
| Overall width (mm) | 700 | 780 |
| Performance | ||
| Top speed (km/h) | 130 | 95 |
| Fuel capacity (l) | - | 11 |
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