Norton Commando 850 Roadster MKII (1975) vs Norton V4 RR & SS (2017) vs Norton Commando 961 Café Racer Special Edition (2010)
Comparison technical specifications
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| Make: | Norton | Norton | Norton |
| Model: | Commando 850 Roadster MKII | V4 RR & SS | Commando 961 Café Racer Special Edition |
| Years: | 1975 | 2017 | 2010 |
| Engine: | Four stroke, parallel twin cylinder, push rod 2 valves per cylinder. | Four stroke, 72 ° V-four cylinder, Chain-driven cams with idler gear for reduced engine height. Titanium inlet valves. Slipper clutch | Four stroke, parallel twin with push-rod valve actuation, 3 bearing crank balancer shaft, 2 valves per cylinder |
| Capacity: | 829 cc / 50.6 cu in | 1200 cc / 73.2 cu in | 961 cc / 58.6 cu in |
| Bore x Stroke: | 77 x 89 mm | 82mm x 56.8mm | 88 x 79 mm |
| Compression Ratio: | 8.5:1 | 13.6:1 | 10.1:1 |
| Cooling System: | Air cooled | Liquid-cooled | Air cooled |
| Induction: | 2 x Ø32 mm Amal concentric carburetors | Electronic fuel-injection system. Constantly variable inlet tracts. 8-fuel injectors. Full drive-by-wire system independent of front and rear banks of cylinders for ultimate control and feel | Fuel injected |
| Ignition: | 120W Lucas alternator | Keyless ignition system | Crank fired electronic |
| Starting: | Electric and kick | Electric | Electric |
| Max Power: | 60 hp / 44.7 kW @ 6200 rpm | 200 hp / 149 kW @ 12,500 rpm | 59.7 kW / 80 hp @ 6500 rpm |
| Transmission: | 4 Speed | Full quickshift system and auto down blipper | 5 Speed, constant mesh |
| Final Drive: | Chain | Chain | Chain, 525 "O" ring |
| Front Suspension: | Telescopic forks | Ohlins NIX30 system front fork. Fully-adjustable. Fork yokes - Cast top and bottom | Ø43 mm Öhlins RSU, adjustable preload, compression, and rebound damping. |
| Rear Suspension: | Swing arm with Girling coil springs | Ohlins TTXGP Norton bespoke fully-adjustable rear shock. Fork yokes - Billet machined | Öhlins reservoir-style twin shocks, adjustable ride height, preload, compression, and rebound damping. |
| Front Brakes: | Single disc | 2 x 330mm full-floating discs. Radially-mounted Brembo monobloc calipers. Brembo discs and Brembo master cylinder | Brembo 2 x Ø320 mm semi-floating carbon stainless steel discs, 4 piston "Gold Line" axial calipers |
| Rear Brakes: | Single disc | Single 330mm disc. Brembo caliper and master cylinder | Brembo single Ø220 mm disc, 2 piston "Gold Line"caliper |
| Fuel Capacity: | 19 Litres / 5.0 US gal | 18 litres / 4.7 US gal | 17 Litres / 4.5 US gal |