Norton Commander Rotary (1991) vs Ducati 450 Mark 3 (1969-75)
Comparison technical specifications
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| Make: | Norton | Ducati |
| Model: | Commander Rotary | 450 Mark 3 |
| Years: | 1991 | 1969-75 |
| Engine: | Twin chamber rotary | Four stroke, single cylinder, SOHC, bevel gear driven |
| Capacity: | 588 cc / 35.9 cu in | 435.7 cc / 26.6 cu in |
| Compression Ratio: | 9.0:1 | 9.3:1 |
| Cooling System: | Liquid cooled | Air cooled |
| Induction: | 2 x Ø38mm CV SUH14 carburetors | Dell'Orto VHB 29 AD |
| Starting: | Electric | Kick |
| Max Power: | 63.4 kW / 85 hp @ 9000 rpm | 18.4 kW / 25 hp @ 6500 rpm |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Ø38 mm Telescopic forks | 35 mm Marzocchi telescopic fork |
| Rear Suspension: | Twin Koni with preload adjust | Swingarm, dual Marzocchi shocks, 3-way adjustable |
| Front Brakes: | 2 x Ø265 mm discs | Drum, 180 mm |
| Rear Brakes: | Single Ø265 mm disc | Drum, 160 mm |
| Front Tyre: | 100/90 V18 | 2.75-18 |
| Rear Tyre: | 110/90 V18 | 3.00-18 |
| Fuel Capacity: | 23 L / 6.1 US gal | 13 Litres / 3.4 US gal / 2.9 Imp gal |