Norton Commando 850 (1975) vs BMW R 67/3 (1955-56)
Comparison technical specifications
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| Make: | Norton | BMW |
| Model: | Commando 850 | R 67/3 |
| Years: | 1975 | 1955-56 |
| Engine: | Four stroke, parallel twin cylinder, push rod 2 valves per cylinder. | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Capacity: | 829 cc / 50.6 cu in | 594 cc / 36.2 cu in |
| Bore x Stroke: | 77 x 89 mm | 72 x 73 mm |
| Compression Ratio: | 8.5:1 | 6.2:1 |
| Cooling System: | Air cooled | Air cooled |
| Induction: | 2 x Amal carburettors | 2 x Bing 1/24/25 - 1/24/26 carburetors |
| Ignition: | 120W Lucas alternator | Magneto ignition |
| Starting: | Electric and kick | Kick |
| Max Power: | 60 hp / 44.7 kW @ 6200 rpm | 20.9 kW / 28 hp @ 5600 rpm |
| Transmission: | 4 Speed | 4 Speed |
| Final Drive: | Chain | Shaft |
| Front Suspension: | Telescopic forks | Telescopic front fork with hydraulic damping; plunger type |
| Frame: | Twin downtube cradle with Isolastic engine mounts | Double loop steel tubular frame |
| Rear Suspension: | Swing arm with Girling coil springs | Spring with coil compression springs and rubber deflection stops |
| Front Brakes: | Single disc | ∅200mm Drum duplex full hub |
| Rear Brakes: | Single disc | ∅200mm Drum simplex full hub |
| Front Tyre: | 4.10-19 | 3.50 -19" |
| Rear Tyre: | 4.10-19 | 3.50 -19" (sidecar, rear 4.00 x 18") |
| Wet Weight: | 220 kg / 485 lbs | 192 kg / 422 lb (with sidecar, 320 kg / 704 lbs) |
| Fuel Capacity: | 19 Litres / 5.0 US gal | 17 liters / 4.4 US gal |