Ducati Berlinger Apollo (1964) vs Triumph 6T Thunderbird (1963-66) vs Ducati 250 GT / 250 Monza (1964-66) vs Ducati 160 Monza Junior (1964-67) vs Ducati 90 Cadet / 90 Cacciatore (Mountaineer) (1964) vs BMW R 68 SDT Special (1952-55)
Comparison technical specifications
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| Make: | Ducati | Triumph | Ducati | Ducati | Ducati | BMW |
| Model: | Berlinger Apollo | 6T Thunderbird | 250 GT / 250 Monza | 160 Monza Junior | 90 Cadet / 90 Cacciatore (Mountaineer) | R 68 SDT Special |
| Years: | 1964 | 1963-66 | 1964-66 | 1964-67 | 1964 | 1952-55 |
| Engine: | Four stroke, 90o V-4, 2 valves | Four stroke, vertical twin, OHV | Four stroke, single cylinder, SOHC, bevel gear-drive | Air cooled, four stroke, single cylinder, OHC, 2 valve per cylinder, bevel gear driven | Two-stroke, single cylinder, piston port | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Capacity: | 1252 cc / 76.4 cu in | 649 cc / 40.0 cu in | 248.6 cc / 15.2 cu in | 156 cc / 9.5 cu in | 86.7 cc / 5.3 cu in | 594 cc / 36.2 cu in |
| Bore x Stroke: | 84.5 x56 mm | 71 x 82 mm | 74 x 57.8 mm | 61 x 52 mm | 49 x 46 | 72 x 73 mm |
| Compression Ratio: | 8:1 | 8.5:1 | 8:1 | 8.2:1 | 8.5 - 9.0:1 | 8.0:1 |
| Cooling System: | Air cooled | Air cooled | Air cooled | Air cooled | Fan cooled | Air cooled |
| Induction: | 4 x SS1 32 mm carburetors | Amal Monobloc | Dell'orto UBF24BS carburetor | Dell'Orto UB22BS | Dell'Orto UA 18S carburetor | 2 x Bing 1/26/9 - 1/26/10 carburetors |
| Starting: | Electric and kick | Kick | Kick | Kick | Kick | Kick |
| Max Power: | 73.5 kW / 100hp @ 7000rpm, or 58.8 kW / 80 hp @ 6000 rpm | 31 kW / 42 hp @ 6500 rpm | GT: 13.7 kW / 18.4 hp @ 7200 rpm Monza: 16.4 kW / 22 hp @ 7200 rpm | 6.9 kW / 9.5 hp @ 8000 rpm | 4.4 kW / 6 hp @ 7000 rpm | 26.1 kW / 35 hp @ 7000 rpm |
| Transmission: | 5 Speed | 4-Speed constant mesh | 5 Speed | 4 Speed | Three Speed | 4 Speed |
| Final Drive: | Chain | Chain | Chain | Chain | Chain | Shaft |
| Front Suspension: | Telescopic forks | Telescopic fork, 2 way hydraulic damping | Hydraulic telescopic fork, Ducati 31.5 mm | Telescopic front fork, hydraulic damping, Marzocci | Telescopic fork | Telescopic front fork with hydraulic damping; plunger type |
| Rear Suspension: | Swinging arm | Swingarm, 2 hydraulic dampers | Swingarm, dual shocks, Marzocchi | Swingarm, dua shocks, 3-way adjustable | Swingarm, twin shocks | Spring with coil compression springs and rubber deflection stops |
| Front Brakes: | Drum | SLS drum, 8 in | Drum, 180 mm | 158 mm Drum | Drum, 118 mm | ∅200mm Drum duplex full hub |
| Rear Brakes: | Drum | SLS drum, 7 in | Drum, 160 mm | 136 mm Drum | Drum, 118 mm | ∅200mm Drum simplex full hub |