BMW R 18 Classic (2021) vs Aprilia SXV 550 (2008-09)
Comparison technical specifications
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| Make: | BMW | Aprilia |
| Model: | R 18 Classic | SXV 550 |
| Years: | 2021 | 2008-09 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, Pushrod-actuated OHV with two camshafts, 4 valves per cylinder | Four stroke, 77° V-twin, SOHC |
| Capacity: | 1802 cc / 110 cu-in | 549 cc / 33.5 cu in |
| Bore x Stroke: | 107.1 X 100 mm | 80 x 55mm |
| Compression Ratio: | 9.6:1 | 12.0:1 |
| Cooling System: | Air/water cooled | Liquid cooled |
| Starting: | Electric, 1.5 kW | Electric |
| Max Power: | 67 kW / 91 hp @ 4750 rpm | 52.2 kW / 70 hp |
| Clutch: | Hydraulically activated single-disc dry clutch | Cable operated multi-plate wet clutch. |
| Transmission: | 6-speed shifting claw transmission in separate transmission housing | 5 Speed |
| Final Drive: | Shaft, 3.091 | Chain |
| Frame: | Construction type double-loop steel tube frame | Steel perimeter frame with alloy vertical members |
| Front Suspension: | 49 mm Telescopic fork, Non-adjustable | Ø48 mm Upside down fork, double adjustment. |
| Rear Suspension: | Steel swinging fork with central shock strut | Box section aluminium swingarm with cast body, hydraulic monoshock with compression and rebound adjustment |
| Front Brakes: | 2x 300mm discs, 4-piston fixed caliper | Single Ø320mm disc, 4 piston caliper |
| Rear Brakes: | Single 300mm disc, 4-piston fixed caliper | Single Ø240mm disc, 2 piston caliper |
| Front Tyre: | 130/90 B16 | 120/70 -17 |
| Rear Tyre: | 180/65 B16 | 180/55 -17 |
| Dimensions: | Length: 2440 mm / 36 in Width: 964 mm / 37.9 in with mirrors | Length: 2220 mm / 87.4 in Width: 800 mm / 31.5 in |
| Wheelbase: | 1731 mm / 68.1 in | 1495 mm / 58.9 in |
| Seat Height: | 710 mm / 27.9 in | 915 mm / 36.0 in |
| Wet Weight: | 365 kg / 804.6 lbs | 142 kg / 313 lbs |
| Fuel Capacity: | 16 Litres / 4.2 US gal | 7.8 Litres / 2.1 US gal |