Aprilia SXV 550 (2008-09) vs Aprilia RS 660 Extrema (2023)
Comparison technical specifications
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| Make: | Aprilia | Aprilia |
| Model: | SXV 550 | RS 660 Extrema |
| Years: | 2008-09 | 2023 |
| Engine: | Four stroke, 77° V-twin, SOHC | Four stroke, forward facing parallel twin, DOHC with silent chain drive on the right side, four valves per cylinder |
| Capacity: | 549 cc / 33.5 cu in | 659 cc / 40.2 cu-in |
| Bore x Stroke: | 80 x 55mm | 81 x 63.93 mm |
| Compression Ratio: | 12.0:1 | 13.5: 1 |
| Cooling System: | Liquid cooled | Liquid cooled with radiator and water-oil heat exchanger |
| Induction: | Integrated engine management system controlling ignition and fuel injection. Throttle body: Ø38 mm | Airbox with front air intake. 2 ∅48 mm throttle bodies, Ride-By-Wire management |
| Starting: | Electric | Electric |
| Clutch: | Cable operated multi-plate wet clutch. | Wet, multi-plate, slipper |
| Max Power: | 52.2 kW / 70 hp | 100 hp / 73.5 kW @ 10500 rpm |
| Transmission: | 5 Speed | 6 Speed, AQS Aprilia Quick Shift |
| Final Drive: | Chain | Chain, with drive ratio: 17/43 |
| Frame: | Steel perimeter frame with alloy vertical members | Double beam aluminium frame with detachable rear seat |
| Front Suspension: | Ø48 mm Upside down fork, double adjustment. | Kayaba upside down fork ∅ 41 mm with counter spring, aluminium feet for fixing radial calipers. Adjustable for rebound, compression and spring preload. |
| Rear Suspension: | Box section aluminium swingarm with cast body, hydraulic monoshock with compression and rebound adjustment | Aluminium swingarm with asymmetrical trusses. Monoshock with adjustable counter spring: rebound and spring preload. |
| Front Brakes: | Single Ø320mm disc, 4 piston caliper | 2x 320mm Brembo radial calipers with 4 32mm opposing pistons. Radial pump and metal braided brake hose |
| Rear Brakes: | Single Ø240mm disc, 2 piston caliper | Single 220mm disc; Brembo calliper with 2 isolated ∅ 34mm pistons. Pump with integrated tank and metal braided hos |
| Front Tyre: | 120/70 -17 | 120/70 ZR 17 Tubeless radials |
| Rear Tyre: | 180/55 -17 | 180/55 ZR 17 (alternatively 180/60 ZR17) Tubeless radials |
| Wheelbase: | 1495 mm / 58.9 in | 1370 mm / 53.9 in |
| Seat Height: | 915 mm / 36.0 in | 815 mm / 32.0 in |
| Wet Weight: | 142 kg / 313 lbs | 166 kg / 366 lbs |
| Fuel Capacity: | 7.8 Litres / 2.1 US gal | 15 Litres / 3.9 US gal |