Aprilia SL 900 Shiver (2017) vs BMW R 25 (1950-51)
Comparison technical specifications
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| Make: | Aprilia | BMW |
| Model: | SL 900 Shiver | R 25 |
| Years: | 2017 | 1950-51 |
| Engine: | Four stroke, longitudinal 90°V twin, DOHC, with mixed gear/chain timing system,4 valves per cylinder | Four stroke, single cylinder, pushrod operated, OHV, 2 valves per cylinder. |
| Capacity: | 896.1 cc / 54.6 cu-in | 247 cc / 15.1 cu in. |
| Bore x Stroke: | 92 x 67.4 mm | 68 x 68 mm |
| Compression Ratio: | 11.0:1 | 6.5:1 |
| Cooling System: | Liquid cooled | Air cooled |
| Induction: | Integrated engine management system. Injection with 3-map Ride- by-wire throttle valve opening management (Sport, Touring, Rain) | 1x Bing type 1/22/28 |
| Ignition: | Digital electronic, integrated with the injection | Battery ignition |
| Starting: | Electric | Kick |
| Max Power: | 70.0 kW / 95.2 hp @ 8750 rpm | 8.9 kW / 12 hp @ 5600 rpm |
| Clutch: | Multiplate wet clutch, hydraulically operated | Single plate, dry |
| Transmission: | 6 Speed | 4 Speed |
| Final Drive: | Chain | Shaft |
| Gear Ratio: | 1st 36/14 (2.57) 2nd 32/17 (1.88) 3rd 30/20 (1.5) 4th 28/22 (1.27) 5th 26/23 (1.13) 6th 25/24 (1.04) | 1st 6.10 / 2nd 3.00 / 3rd 2.04 / 4th 1.54:1 |
| Frame: | Modular tubular steel frame fastened to aluminum side plates by high strength bolts. Dismountable rear frame. | Closed steel twin loop frame, welded |
| Front Suspension: | Upside-down fork, stanchions Æ 41, with adjustable hydraulic rebound damping and spring preload. | Telescopic fork |
| Rear Suspension: | Aluminum alloy swingarm with stiffening truss. Hydraulic shock absorber with adjustable extension and spring preload. | Pushrod suspension, spring loaded saddle |
| Rear Brakes: | Single Ø245 mm stainless steel disc, Single piston calliper. Metal braided line | ∅160mm Drum |
| Front Tyre: | 120/70 ZR17 | 3.25 x 19" |
| Rear Tyre: | 180/55 ZR17 | 3.25 x 19" |
| Fuel Capacity: | 15 Litres / 3.9 US gal | 12 L / 3.1 US gal |