Comparison of BSA A 50 Royal Star 1964 and Sunbeam S8 500 1956 [S]ave
| Attribute |  BSA A 50 Royal Star 1964 × |  Sunbeam S8 500 1956 × |
|---|---|---|
| General | ||
| Production from (year) | 1964 | 1956 |
| Make | BSA | Sunbeam |
| Model | BSA A 50 Royal Star | Sunbeam S8 500 |
| Category | Naked bike | Sport touring |
| Engine and transmission | ||
| Engine type | Twin, four-stroke | Twin, four-stroke |
| Fuel system | Carburettor | Carburettor |
| Displacement (cm³) | 500 | 487 |
| Power (kw) | 24.1 | 17.5 |
| Cooling system | Air | Oil & air |
| Transmission type,final drive | Chain | Shaft drive (cardan) |
| Bore (mm) | 65.5 | 70 |
| Stroke (mm) | 74 | 63.5 |
| Fuel control | Overhead Valves (OHV) | Single Overhead Cams (SOHC) |
| Clutch | Wet multiplate | Dry singleplate |
| Lubrication system | - | Wet sump |
| Compression | 7.5:1 | 6.5:1 |
| Chassis | ||
| Front suspension | Hydralic telescopic forks | Telescopic |
| Rear suspension | Twin shock | Plungers |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | Single cradle | Twin cradle |
| Front tyre | 3.25-18 | - |
| Rear tyre | 3.25-18 | - |
| Seat | Dual seat | Two single seats |
| Wheels | - | Spoked |
| Dimensions | ||
| Wheelbase (mm) | 1,391 | 1,400 |
| Performance | ||
| Fuel capacity (l) | 18 | - |
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