Comparison of AJS Model 31 650 Swift 1959 and Harley-Davidson Model C 1931 [S]ave
| Attribute |  AJS Model 31 650 Swift 1959 × |  Harley-Davidson Model C 1931 × |
|---|---|---|
| General | ||
| Production from (year) | 1959 | 1931 |
| Make | AJS | Harley-Davidson |
| Model | AJS Model 31 650 Swift | Harley-Davidson Model C |
| Category | Allround | Allround |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor | - |
| Displacement (cm³) | 646 | 742.6 |
| Power (kw) | 22.9 | - |
| Cooling system | Air | - |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 72 | 69.9 |
| Stroke (mm) | 79.3 | 96.9 |
| Gearbox | 4-speed | - |
| Fuel control | Overhead Valves (OHV) | - |
| Ignition | Bobine | - |
| Clutch | Wet multiplate | - |
| Compression | 7.5:1 | - |
| Chassis | ||
| Front suspension | Hydraulic telescopic | - |
| Rear suspension | Twin shock Girling | - |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | Doble cradle | - |
| Front tyre | 3.25-19 | 3-26 |
| Rear tyre | 3.25-19 | 3-26 |
| Seat | Dual | Single spring-mounted |
| Wheels | Spoked | Spoked |
| Other | ||
| Starter | Kick | - |
| Dimensions | ||
| Dry weight (kg) | 176 | 167 |
| Power/weight ratio | 0.1301 | - |
| Performance | ||
| Fuel capacity (l) | 16 | - |
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