Bultago Bultaco Alpina 250 (1971-79) vs Adler MB 250S (1955) vs Adler M 100 (1949-56) vs Matchless G45 (1951-58)
Comparison technical specifications
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| Make: | Bultago | Adler | Adler | Matchless |
| Model: | Bultaco Alpina 250 | MB 250S | M 100 | G45 |
| Years: | 1971-79 | 1955 | 1949-56 | 1951-58 |
| Engine: | 2 cylinder, 2 stroke, flat-crowned pistons | 1 cylinder, 2 stroke | Single cylinder, four stroke, OHV | |
| Capacity: | 247 cc / 15.1 cub in. | 98 cc / 6 cub in. | 498 cc / 30.4 cub in. | |
| Bore x Stroke: | 54 x 54 mm | 50 x 50 mm | 66 x 72.8 mm | |
| Ignition: | 6 V 45/60 W ignition set, battery and coil | Magneto | Lucas competition magneto | |
| Starting: | Kick | Kick start | Kick start | Kick |
| Transmission: | 4 Speed gearbox housed in engine block, foot gearchange | 3 Speed gearbox | 4-Speed, close ratio | |
| Final Drive: | Chain | Chain, fully enclosed | Chain | Chain |
| Front Suspension: | Twin swinging leading link forks with shock absorber and steering damper | Leading link | AMC teledraulic, with stabilizer | |
| Rear Suspension: | Plunger shock absorbers, adjustable for load and road conditions | Twon shock, plunger | Dowty Oleomatic | |
| Dry Weight: | 135 kg / 298 lbs | 55 kg / 121 lbs | 145 kg / 320 lbs |