Comparison of AJS Model 20 500 1954 and Velocette Thruxton 1964 [S]ave
| Attribute |  AJS Model 20 500 1954 × |  Velocette Thruxton 1964 × |
|---|---|---|
| General | ||
| Production from (year) | 1954 | 1964 |
| Make | AJS | Velocette |
| Model | AJS Model 20 500 | Velocette Thruxton |
| Category | Allround | Allround |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 498 | 499 |
| Power (kw) | 14.6 | - |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 66 | 86 |
| Stroke (mm) | 72.8 | 86 |
| Gearbox | 4-speed | 4-speed |
| Fuel control | - | Overhead Valves (OHV) |
| Ignition | Magneto | Magneto |
| Clutch | Wet multiplate | Wet multiplate |
| Compression | 7.0:1 | 9.1:1 |
| Chassis | ||
| Front suspension | Telescopic | Hydralic telescopic forks |
| Rear suspension | Twin shock | 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 | 3-19 |
| Rear tyre | 3.25-19 | 3.25-19 |
| Seat | Dual | Dual seat |
| Wheels | Spoked | Spoked |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Dry weight (kg) | 178 | 170 |
| Power/weight ratio | 0.082 | - |
| Overall height (mm) | 1,050 | 990 |
| Overall length (mm) | 2,190 | 2,130 |
| Overall width (mm) | 710 | 700 |
| Performance | ||
| Top speed (km/h) | 137 | - |
| Fuel capacity (l) | 13.5 | 17 |
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