Velocette Viceroy (1960-64) vs BMW R 100RS (1976)
Comparison technical specifications
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| Make: | Velocette | BMW |
| Model: | Viceroy | R 100RS |
| Years: | 1960-64 | 1976 |
| Engine: | Two stroke, horizontally opposed twin cylinder | Four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder |
| Capacity: | 247 cc / 15.1 cub in | 980 cc / 59.8 cub in. |
| Bore x Stroke: | 54 x 54 mm | 94 x 70.6 mm |
| Compression Ratio: | 7.5:1 | 9.5:1 |
| Cooling System: | Air cooled | Air cooled |
| Lubrication: | Wet sump | Wet sump |
| Ignition: | Coil | Battery ignition |
| Starting: | Kick start | Electric |
| Max Power: | 11 kW / 15 hp | 51 kW / 70 hp / @ 7000 rpm |
| Clutch: | Dry, three-plate | Dry single plate, with diaphragm spring |
| Transmission: | 4 Speed constant mesh | 5 Speed |
| Final Drive: | Belt | Shaft |
| Gear Ratio: | 1st 2.078 / 2nd 1.353 / 3rd 1.0 / 4th 0.739:1 | 1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1 |
| Frame: | Single massive tube, panels light alloy castings | Double sown tubs, dual cradle |
| Dimensions: | Length: 2007 mm / 79 in | Length 2130 mm / 83.8 in Width 746 mm / 29.37 in Height 1300 mm / 51.8 in |
| Wheelbase: | 1346 mm / 53 in | 1465 mm / 57.67 in |
| Seat height: | 737 mm / 29 in | 820 mm / 32.3 in |
| Ground Clearance: | 127 mm / 5 in | 165 mm / 6.49 in |
| Front Suspension: | Telescopic fork | Telescopic fork with hydraulic shock absorber. |
| Rear Suspension: | Woodhead-Monroe springs with hydraulic damping | Long swinging arm with adjustable strut. |
| Front Brakes: | 6 x 1" drum | 2 x ∅260mm discs, 2 piston calipers |
| Rear Brakes: | 6 x 1" drum | Simplex ∅200 mm drum |
| Front Tyre: | 4 x 12" | 3.25 - H19 |
| Rear Tyre: | 4 x 12" | 4.00 - H18 |
| Fuel Capacity: | 10.2 L / 2.7 US gal | 24 Litres / 6.3 US gal |