Aprilia SMV 750 Dorsoduro (2008) vs Aprilia RXV 550i (2008) vs Harley-Davidson Harley Davidson VRSCDX Night Rod Special (2012) vs Triumph T120R Bonneville 650 (1968)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Harley-Davidson | Triumph |
| Model: | SMV 750 Dorsoduro | RXV 550i | Harley Davidson VRSCDX Night Rod Special | T120R Bonneville 650 |
| Years: | 2008 | 2008 | 2012 | 1968 |
| Engine: | Four stroke, longitudinal 90°V twin, DOHC, 4 valves per cylinder | Four stroke, 77° V-twin cylinder | Four stroke, 60° V-twin, DOHC, 4 valve per cylinder. | Four stroke, parallel twin, OHV |
| Capacity: | 749.9 cc / 45.7 cu-in | 549 cc / 33.5 cu in | 1247 cc / 76.1 cu in | 649 cc / 39.6 cu in |
| Bore x Stroke: | 92 x 56.4 mm | 80 x 55 mm | 105 x 72 mm | 71 x 82 mm |
| Compression Ratio: | 11.0:1 | 12.0:1 | 11.5;1 | 8.5:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Air cooled |
| Induction: | Integrated engine management system. Latest generation 3 maps (Sport, Touring, Rain) Ride-by-Wire throttle management. | Integrated engine management system controlling ignition and fuel injection. Throttle body: Ø40 mm | Electronic Sequential Port Fuel Injection | 2 x Amal 1 - 1/6" carburetors |
| Ignition: | Digital electronic, integrated with the injection, two spark plugs per cylinder | Electronic | Digital CDI | Lucas MA6 alternator with 2 coils |
| Starting: | Electric | Electric | Electric | Kick |
| Max Power: | 67.3 kW / 92 hp @ 8750 rpm | 52.2 kW / 70 hp @ 13000 rpm | 123 hp / 90.5 kW @ 8000 rpm | 34 kW / 46 hp @ 6500 rpm |
| Transmission: | 6 Speed | 5 Speed | 5 Speed | 4 Speed, constant mesh |
| Final Drive: | Chain | Chain | Belt | Chain, 106 links |
| Frame: | Modular steal trellis secured to albumin side plates by high steal bolts. | Steel perimeter frame with alloy vertical members | Steel perimeter upper frame w/hydroformed main rails and bolt-on lower frame rails, MIG welded | Single front downtube, second bracing member running under tank |
| Front Suspension: | Ø43 mm Upside-down fork. | Ø45 mm Upside down fork, double adjustment | Huge 49mm telescopic forks | Telescopic forks, hydraulic damping |
| Rear Suspension: | Aluminium alloy swingarm with reinforcement truss. Hydraulic shock absorber adjustable in spring preload and rebound damping. | Box section aluminium swingarm with cast body, Hydraulic monoshock with compression and rebound adjustment | Dual coil over adjustable shock | Swingarm, twin Girling dampers |
| Front Brakes: | 2 x Ø320 mm discs, 4 piston caliper | Single Ø270 mm disc, 4 piston caliper | 2x 300mm discs 4 piston calipers | 8" SLS drum |
| Rear Brakes: | Single Ø240 mm disc, 1 piston caliper | Single Ø240 mm disc, 2 piston caliper | Single 300mm disc 4 piston caliper | 7" SLS drum |
| Front Tyre: | 120/70 ZR17 | 90/90 -21 | 120/70ZR-19 60W | 3.25 x 19, Dunlop Universal |
| Rear Tyre: | 190/55 ZR17 | 140/80 -18 | 240/40R-18 79V | 4.00 x 18, Dunlop Universal |
| Fuel Capacity: | 12 Litres / 3.17 US gal | 7.8 Litres / 2.1 US gal | 18.9 Litres / 5.0 US gal | 13.6 Litres / 3.6 US gal other Export: 18 Litres / 4.8 US gal |