BMW R 69S (1960-62) vs Ducati 450 Mark 3 (1969-75)
Comparison technical specifications
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| Make: | BMW | Ducati |
| Model: | R 69S | 450 Mark 3 |
| Years: | 1960-62 | 1969-75 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, single cylinder, SOHC, bevel gear driven |
| Capacity: | 594 cc / 36.2 cu in | 435.7 cc / 26.6 cu in |
| Bore x Stroke: | 72 x 73 mm | 86 x 75 mm |
| Compression Ratio: | 9.5:1 | 9.3:1 |
| Cooling System: | Air cooled | Air cooled |
| Induction: | 2 x Bing 1/26/9 - 1/26/10 carburetors | Dell'Orto VHB 29 AD |
| Ignition: | Magneto ignition | Points and coil (electronic from 1973) |
| Starting: | Electric | Kick |
| Clutch: | Single plate, dry | Wet, multiplate |
| Max Power: | 31.3 kW / 42 hp @ 7000 rpm | 18.4 kW / 25 hp @ 6500 rpm |
| Transmission: | 4 Speed | 5 Speed |
| Final Drive: | Shaft | Chain |
| Front Suspension: | Telescopic front fork with hydraulic damping | 35 mm Marzocchi telescopic fork |
| Rear Suspension: | Swingarm, plunger type shock absorbers | Swingarm, dual Marzocchi shocks, 3-way adjustable |
| Front Brakes: | ∅200mm Drum | Drum, 180 mm |
| Rear Brakes: | ∅200mm Drum | Drum, 160 mm |
| Front Tyre: | 3.50 - S18" | 2.75-18 |
| Rear Tyre: | 4.00 - S18" | 3.00-18 |
| Fuel Capacity: | 17 liters / 4.4 US gal | 13 Litres / 3.4 US gal / 2.9 Imp gal |