| Attribute | Gilera Saturno Bialbero 1952 × | Sunbeam S8 500 1955 × |
|---|---|---|
| General | ||
| Production from (year) | 1952 | 1955 |
| Make | Gilera | Sunbeam |
| Model | Gilera Saturno Bialbero | Sunbeam S8 500 |
| Category | Sport | Sport touring |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Twin, four-stroke |
| Fuel system | Carburettor. DellÓrto SS38 | Carburettor |
| Displacement (cm³) | 498.8 | 487 |
| Power (kw) | 32.8 | 17.5 |
| Cooling system | Air | Oil & air |
| Transmission type,final drive | Chain | Shaft drive (cardan) |
| Bore (mm) | 84 | 70 |
| Stroke (mm) | 90 | 63.5 |
| Gearbox | 4-speed | - |
| Fuel control | Overhead Valves (OHV) | Single Overhead Cams (SOHC) |
| Clutch | - | Dry singleplate |
| Lubrication system | - | Wet sump |
| Compression | 8.0:1 | 6.5:1 |
| Chassis | ||
| Front suspension | - | Telescopic |
| Rear suspension | - | Plungers |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Frame type | - | Twin cradle |
| Front tyre | 3.25-19 | - |
| Rear tyre | 3.25-19 | - |
| Seat | - | Two single seats |
| Wheels | Spoked | Spoked |
| Dimensions | ||
| Wheelbase (mm) | 1,380 | 1,400 |
| Dry weight (kg) | 125 | 187 |
| Power/weight ratio | 0.2624 | 0.0936 |
| Performance | ||
| Fuel capacity (l) | 19 | - |