BMW K75S (1985-86) vs BMW HP Sport (2009-10) vs Beta Alp 4.0 (2003-04)
Comparison technical specifications
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| Make: | BMW | BMW | Beta |
| Model: | K75S | HP Sport | Alp 4.0 |
| Years: | 1985-86 | 2009-10 | 2003-04 |
| Engine: | Four-stroke, horizontal three cylinder in-line, DOHC, 2 valves per cylinder | Four stroke, two cylinder horizontally opposed Boxer air/oil-cooled, DOHC, 4 valves per cylinder | Four stroke, single cylinder, SOHC, 4 valves |
| Capacity: | 740 cc / 45 cub. in. | 1170 cc / 71.5 cub. in. | 349 cc / 21.3 cu in |
| Bore x Stroke: | 67 x 70 mm | 101 x 73 mm | 79 x 71.2 mm |
| Compression Ratio: | 11.0:1 | 12.5:1 | 9.5:1 |
| Induction: | Electronic injection, Bosch LE-Jetronic | BMS-K 52mm throttle butterfly | Mikuni BST 33 |
| Starting: | Electric | Electric | Electric |
| Max Power: | 55 kW / 75 hp @ 8500 rpm | 96 kW / 130 hp @ 8750 rpm | 20 kW / 27 hp |
| Max Torque: | 68 Nm / 6.9 kgf-m / 50 ft lb @ 6750 rpm | 115 Nm / 11.7 kgf-m / 85 lb-ft @ 6000 rpm | 28 Nm / 2.9 kgf-m 21 lb-ft |
| Transmission: | 5 Speed | 6 Speed | 6 Speed |
| Clutch: | Single dry plate | Single-disc dry clutch ,Ø180 mm | Wet, multi disc |
| Final Drive: | Shaft | Shaft | Chain |
| Frame: | Double-downtube frame with engine as a stressed member; box-section aluminum monolever swing arm. | Main frame and front frame made of steel tube, rear frame and front fairing self-supporting CIF, self-supporting power unit | Tubular steel, double closed cradle |
| Front Suspension: | Telescopic fork with hydraulic shock absorber. | BMW Telelever, 105mm wheel travels | Hydraulic fork, 48mm Ø |
| Front Wheel Travel: | 185mm / 7.3 in. | 105 mm / 4.1 in | 200 mm / 7.9 in |
| Rear Suspension: | Monolever swinging arm. | BMW Paralever, 120mm wheel travels | Single shock adjustable spring preload |
| Rear Wheel Travel: | 114mm / 4.5 in. | 120 mm / 4.7 in | 220 mm / 8.7 in |
| Front Brakes: | 2 x ∅285mm discs, 2 piston calipers | 2 x ∅320mm discs | Single 260 mm Ø disc, 2-piston caliper |
| Rear Brakes: | Single ∅285mm disc | Single ∅265mm disc | Single 220 mm Ø disc, 2-piston caliper |
| Front Tyre: | 100/90-18 | 120/ 70 ZR17 | 90/90 -21 |
| Rear Tyre: | 130/90-17 | 190/55 ZR17 | 140/80 -18 |
| Dimensions: | Length 2220 mm / 87. in. Width 900 mm / 35.4 in Height 1340 mm / 51.2 in | Length: 2,135 mm / 84.1 in Width (incl. mirrors): 750 mm / 29.5 in Height (excl. mirrors): 1,163 mm / 45.9 in | Length: 2185 mm / 86.0 in Width: 860 mm / 33.9 in Height: 1230 mm / 48.4 in |
| Seat Height: | 810 mm /31.9 in. or 760 mm / 29.9 in. for low seat model | 830 mm / 32.7 in | 865 mm / 34 in |
| Fuel Capacity: | 21 liters / 5.54 US gal | 16 L / 4.2 US gal | 10.5 Litres / 2.8 US gal |
| Top Speed: | 210 km/h / 131 mph | 248.7 km/h / 154.5 mph | 131.1 km/h / 81.5 mph |