BMW R nineT Urban G/S (2021) vs Ducati 851 SP Biposto (1990-92)
Comparison technical specifications
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| Make: | BMW | Ducati |
| Model: | R nineT Urban G/S | 851 SP Biposto |
| Years: | 2021 | 1990-92 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, two camshafts and four radially aligned valves per cylinder, central counterbalancer shaft. | Four stroke, 90°“L”twin cylinder, DOHC, desmodromic 4 valves per cylinder, belt driven |
| Capacity: | 1170 cc / 71.4 cub in | 851 cc / 51.9 cu in |
| Bore x Stroke: | 101 x 73 mm | 92 x 64 mm |
| Cooling System: | Air/Oil cooled | Liquid cooled |
| Compression Ratio: | 12.0:1 | 10.5:1 |
| Induction: | Electronic intake pipe injection / digital engine management with overrun cutoff, twin-spark ignition | Weber I.A.W. CPU P7 electronic fuel injection. 2 x 50mm throttle bodies |
| Battery: | 12 V / 12 Ah, maintenance-free | 12V 16Ah |
| Starting: | Electric | Electric |
| Max Power: | 80 kW /109 hp @ 7250 rpm | 80.9 kW / 110 hp @ 9600 rpm (rear tyre: 69.9 kW / 95 hp @ 9000 rpm) |
| Max Torque: | 116 Nm / 11.8 kgf-m / 85.6 lb-ft @ 6000 rpm | 70.6 Nm / 7.2 kgf-m / 52.1ft-lb @ 7000 rpm |
| Clutch: | Single dry plate clutch, hydraulically operated | Dry,multiplate |
| Transmission: | 6-speed, Claw-shifted transmission with helical-cut splines | 6 Speed |
| Final Drive: | Shaft | Chain |
| Frame: | Four-part frame concept with front frame and three-part rear frame, load-bearing engine-gearbox unit, rear-seat frame removeable for one-up riding | Tubular steel |
| Front Suspension: | 46 mm upside-down telescopic forks | 41 mm Showa upside-down fork with rebound compression damping adjustable |
| Rear Suspension: | Cast aluminium single swinging arm with BMW Motorrad Paralever; central spring strut, spring preload fully adjustable by hook wrench, adjustable rebound-stage damping | Showa single shock with preload and damping adjust |
| Front Brakes: | 2 x 320 mm discs, 4 piston calipers | 2 x 320 mm Disc, 4 piston calipers |
| Rear Brakes: | Single 265 mm disc, 2 piston floating caliper | Single 245 mm disc, 2 piston caliper |
| Front Tyre: | 120/70 - R19 | 120/60 x 17 |
| Rear Tyre: | 170/60 - R17 | 180/55 x 17 |
| Dimensions: | Length 2175 mm / 85.6 in Width 865 mm / 34.0 in Height 1330 mm / 52.3 in | Length: 2000 mm / 78.7 in Width: 670 mm / 26.4 in Height: 1120 mm / 44.1 in |
| Wheelbase: | 1527 mm / 60/1 in | 1430 mm / 56.3 in |
| Seat Height: | 850 mm / 33.4 in | 760 mm / 29.9 in |
| Wet Weight: | 223 kg / 491.6 lbs | 210kg / 462 lbs |
| Fuel Capacity: | 17 Litres / 4.5 US gal | 20 Litres / 5.3 US gal / 4.4 Imp gal |