BMW R 45 (1982-85) vs BMW K 1200LT (1999-02) vs BMW R 1250RT (2021) vs BMW R 80G/S (1982)
Comparison technical specifications
Add bike |
Remove bike |
Remove bike |
Remove bike |
Remove bike |
| Make: | BMW | BMW | BMW | BMW |
| Model: | R 45 | K 1200LT | R 1250RT | R 80G/S |
| Years: | 1982-85 | 1999-02 | 2021 | 1982 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, horizontal in line four cylinder, DOHC, 4 valves per cylinder | Four stroke, two cylinder horizontally opposed Boxer, with two overhead, spur gear driven camshafts , a counterbalance shaft and variable intake camshaft control system BMW ShiftCam, 4 valves per cylinder, Intake 40mm, outlet 34 mm | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. |
| Capacity: | 453 cc / 27.6 cu in. | 1172 cc / 71.5 cu in | 1254 cc / 76.5 cu-in | 797.5 cc / 48.7 cu in. |
| Compression Ratio: | 8.2:1 | 10.8:1 | 12.5:1 | 9.2:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid / Air cooled | Air cooled |
| Induction: | 2 x Bing V65 carburetors | Electronic intake pipe injection | Electronic intake pipe fuel injection, 52mm throttle valve | 2 x Bing constant depression carburetorss |
| Max Power: | 20 kW / 27 hp @ 6500 rpm | 72 kW / 98 hp @ 6750rpm | 136 hp / 100 kW @ 7750 rpm | 37 kW / 50 hp @ 6500 rpm |
| Max Torque: | 37.5 Nm 3.8 kgf-m / 27.65 lb-ft @ 5500 rpm | 115 Nm / 11.7 kgf-m / 84 ft-lb @ 4750 rpm | 143 Nm / 105.4 lb-ft @ 6250 rpm | 56.7 Nm / 5.8 kgf-m / 41 ft lb @ 5000 rpm |
| Transmission: | 5 Speed | 5 Speed | 6-speed helical synchromesh gearbox | 5 Speed |
| Final Drive: | Shaft | Shaft | Shaft | Shaft |
| Front Suspension: | Telescopic hydraulic forks | Motorrad Telelever, stanchion diameter ∅35 mm, central strut | BMW Motorrad 37mm Telelever, central spring strut | Telescopic hydraulic forks |
| Rear Suspension: | Long swinging arm with adjustable strut | Die cast Aluminum single sided swinging arm with Paralever, central strut, spring preload adjustable to continuously variable levels by mean of hydraulic hand wheel | Cast aluminium single-sided swinging arm with BMW Motorrad Paralever, WAD spring strut, spring preload continuously and hydraulically adjustable via adjuster knob, adjustable rebound-stage damping via adjuster knob | Monolever swinging arm |
| Front Brakes: | 2 x ∅260mm Discs, 2 piston caliper. | 2 x ∅320mm disc, 4 piston calipers, ABS | 2x 320mm floating discs, 4-piston radial brake calipers | Single ∅260mm disc |
| Rear Brakes: | Single ∅200mm drum | Single ∅285mm disc, 2 piston caliper, ABS | Single 276mm disc, 2-piston floating caliper | ∅200mm Drum |
| Front Tyre: | 1.85 - B18 | 120/70 ZR17 | 120/70 ZR17 | 3.00 - 21 |
| Rear Tyre: | 2.50 - B18 | 160/70 ZR17 | 180/55 ZR17 | 4.00 - 18 |
| Fuel Capacity: | 22 Litres / 5.8 US gal | 22 L / 5.8 US gal | 25 Litres / 6.6 US gal | 19.5 L / 5.1 US gal |