Comparison of AJS Model 20 500 1959 and NSU 501 SS 1934 [S]ave
| Attribute |  AJS Model 20 500 1959 × |  NSU 501 SS 1934 × |
|---|---|---|
| General | ||
| Production from (year) | 1959 | 1934 |
| Make | AJS | NSU |
| Model | AJS Model 20 500 | NSU 501 SS |
| Category | Allround | Sport |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 498 | 494 |
| Power (kw) | 14.6 | 14.6 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 66 | 80 |
| Stroke (mm) | 72.8 | 99 |
| Ignition | Magneto | - |
| Clutch | Wet multiplate | - |
| Compression | 7.0:1 | - |
| Chassis | ||
| Front suspension | Telescopic | - |
| Rear suspension | Twin 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 | - |
| Front tyre | 3.25-19 | 2.50-26 |
| Rear tyre | 3.25-19 | 3.25-26 |
| Seat | - | Single |
| Wheels | Spoked | Spoked |
| Dimensions | ||
| Dry weight (kg) | 178 | 158 |
| Power/weight ratio | 0.082 | 0.0924 |
| Performance | ||
| Top speed (km/h) | 137 | 125 |
| Fuel capacity (l) | 13.5 | 11 |
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