Comparison of AJS Model 20 500 1959 and DKW SB 500 1939 [S]ave
| Attribute |  AJS Model 20 500 1959 × |  DKW SB 500 1939 × |
|---|---|---|
| General | ||
| Production from (year) | 1959 | 1939 |
| Make | AJS | DKW |
| Model | AJS Model 20 500 | DKW SB 500 |
| Category | Allround | Allround |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Twin, two-stroke |
| Fuel system | Carburettor | Carburettor. Amal |
| Displacement (cm³) | 498 | 493.9 |
| Power (kw) | 14.6 | 10.9 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 66 | 68 |
| Stroke (mm) | 72.8 | 68 |
| Ignition | Magneto | - |
| Clutch | Wet multiplate | - |
| Compression | 7.0:1 | 5.7:1 |
| Chassis | ||
| Front suspension | Telescopic | - |
| Rear suspension | Twin shock | Rigid |
| 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 | 3.5-19 |
| Rear tyre | 3.25-19 | 3.5-19 |
| Wheels | Spoked | - |
| Dimensions | ||
| Dry weight (kg) | 178 | 165 |
| Power/weight ratio | 0.082 | 0.0661 |
| Performance | ||
| Top speed (km/h) | 137 | 115 |
| Fuel capacity (l) | 13.5 | - |
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