BMW R 4 (1932-37) vs BMW K 100RS ABS (1988) vs BMW R 80G/S Dakar (GS80R-GS980R) (1980(preparedbyHPN))
Comparison technical specifications
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| Make: | BMW | BMW | BMW |
| Model: | R 4 | K 100RS ABS | R 80G/S Dakar (GS80R-GS980R) |
| Years: | 1932-37 | 1988 | 1980(preparedbyHPN) |
| Engine: | Four stroke, single cylinder vertical | Four stroke, horizontal in line four cylinder, DOHC, 2 valves per cylinder | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Capacity: | 498 cc / 30.4 cu in. | 987 cc / 60.2 cub. in | 798 cc / 48.7 cu in |
| Bore x Stroke: | 84 x 78 mm | 67 x 70 mm | 84.8 x 70.6 mm |
| Compression Ratio: | 5.7:1 | 10.2:1 | 9.3:1 |
| Cooling System: | Air cooled | Liquid cooled | Air cooled |
| Starting: | Kick | Electric | Electric & Kick |
| Max Power: | 10.4 kW / 14hp @ 4000 rpm | 65.6 kW / 90 hp @ 8000 rpm | 41 kW / 55 hp @ 7000 rpm |
| Transmission: | 4 Speed | 5 Speed | 5 Speed |
| Front Suspension: | Plate spring, 9 laminae with 2 friction shock absorbers | Telescopic fork with hydraulic shock absorber | Maico fork |
| Rear Suspension: | Rigid, sping loaded saddle | Monolever swinging arm | Bielstein shocks 170mm wheel travel |
| Rear Brakes: | ∅160mm Drum | Single ∅285 mm disc, 1 piston caliper, ABS | ∅160mm Drum |
| Front Tyre: | 3.50 x 26" SS | 100/90-V18 | 3.50 - 21" |
| Rear Tyre: | 3.50 x 26" SS | 130/90-V17 | 4.50 -18" |
| Fuel Capacity: | 12 L / 3.2 US gal | 22 Liters / 5.8 US gal | 38 L / 10 US gal |