BMW R 50/2 (1960-69) vs BMW R 850 RT (2000-02)
Comparison technical specifications
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| Make: | BMW | BMW |
| Model: | R 50/2 | R 850 RT |
| Years: | 1960-69 | 2000-02 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, two-cylinder, horizontally-opposed Boxer engine, 4 valves per cylinder |
| Capacity: | 494 cc / 30.1 cu in. | 848 cc / 51.7 cu in. |
| Bore x Stroke: | 68 x 68 mm | 87.5 x 70.5 mm |
| Compression Ratio: | 6.8:1 | 10.3:1 |
| Cooling System: | Air cooled | Air/Oil-cooled |
| Induction: | 2 x Bing 1/24/45 - 1/24/46 carburetors | Electronic injection, Bosch Motronic |
| Ignition: | Magneto ignition | Electronic Bosch Motronic MA 2.4 |
| Starting: | Kick | Electric |
| Clutch: | Single plate saucer spring, dry | Single disc dry clutch, hydraulically operated |
| Max Power: | 19.4 kW / 26 hp @ 5800 rpm | 53.2 kW / 73 hp @ 6750 rpm |
| Transmission: | 4 Speed | 5 Speed |
| Final Drive: | Shaft | Shaft |
| Frame: | Double loop steel tubular frame | Three section composite frame consisting of front & rear section, load bearing engine |
| Front Suspension: | Telescopic fork | Motorrad Telelever, stanchion ∅35 mm, central strut, rebound damping adjustable. |
| Rear Suspension: | Long swing arm with suspension units and oil pressure shock absorbers | Die-cast aluminium single sided swinging arm with BMW Motorrad Paralever, central strut, spring preload adjustable to continuously variable levels by means of a hydraulic handwheel, rebound adjustable damping. |
| Front Brakes: | ∅200mm Drum, duplex full hub | 2 x ∅320mm discs, 4 piston calipers |
| Rear Brakes: | ∅200mm Drum, simplex full hub | Single ∅276mm disc, 2 piston caliper |
| Front Tyre: | 3.50 -18" | 120/70 - ZR17 |
| Rear Tyre: | 4.00 -18" | 160/60 - ZR17 |
| Wet-Weight: | 195 kg / 429 lbs | 282 Kg / 621 lbS |
| Fuel Capacity: | 17 liters / 4.49 US gal | 20.5 Liters / 5.4 US gal |