BMW R 80ST (1982) vs BMW R 37 (1925-27)
Comparison technical specifications
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| Make: | BMW | BMW |
| Model: | R 80ST | R 37 |
| Years: | 1982 | 1925-27 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated, OHV |
| Capacity: | 797.5 cc / 48.7 cu in. | 494 cc / 30.1 cu in. |
| Bore x Stroke: | 84.8 x 70.6 mm | 68 x 68 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 9.2:1 | 6.2:1 |
| Induction: | 2 x Bing constant depression carburetors | 1 x BMW Spezial three valve ∅26 mm |
| Ignition: | Battery ignition | Bosch magneto ignition |
| Starting: | Electric | Kick |
| Max Power: | 36.4 kW / 50 hp @ 6500 rpm | 11.9 kW / 16 hp @ 4000 rpm |
| Clutch: | Dry single plate, with diaphragm spring | Single plate saucer spring, dry |
| Gear Ratio: | 1st 4.40 / 2nd 2.86 / 3rd 2.07 / 4th 1.67 / 5th 1.50:1 | 1st 2.50 / 2nd 1.50 / 3rd 1.08:1 |
| Frame: | Double loop tubular frame with bolt on rear section | Twin loop tubular frame |
| Front Suspension: | Telescopic hydraulic fork | Twin cantilever spring |
| Rear Suspension: | BMW Monolever swinging arm | Rigid, spring loaded saddle |
| Front Brakes: | Single ∅285mm disc, 1 piston caliper | ∅150mm Drum |
| Rear Brakes: | ∅200mm Drum | Block brake |
| Front Tyre: | 100/90-H19 | 26 x 3.00" |
| Rear Tyre: | 120/90-H18 | 26 x 3.00" |
| Wet Weight: | 198 Kg / 436 lbs | 134 kg / 295 lbs |
| Fuel Capacity: | 19 Litres / 5.0 US gal | 14 liters / 3.6 USgal |