Aprilia RX50 (2014-15) vs Aprilia RX 125 (1983-84) vs Aprilia SXV 450 (2006-07) vs Aprilia SMV 750 Dorsoduro (2012) vs Aprilia SMV 750 Dorsoduro (2009)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia | Aprilia | Aprilia |
| Model: | RX50 | RX 125 | SXV 450 | SMV 750 Dorsoduro | SMV 750 Dorsoduro |
| Years: | 2014-15 | 1983-84 | 2006-07 | 2012 | 2009 |
| Engine: | Single cylinder, two stroke | Single cylinder, two stroke | Four stroke, 77° V-twin, SOHC | Four stroke, longitudinal 90°V twin, DOHC, 4 valves per cylinder | Four stroke, longitudinal 90°V twin, DOHC, 4 valves per cylinder |
| Capacity: | 49.9 cc / 3.04 cu in | 124.8 cc / 7.6 cu in | 449 cc / 27.4 cu in | 749.9 cc / 45.7 cu-in | 749.9 cc / 45.7 cu-in |
| Bore x Stroke: | 39.9 x 40 mm | 54 x 54.5 mm | 76 X 49.5 mm | 92 x 56.4 mm | 92 x 56.4 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 11.5:1 | 11.5:1 | 12.5:1 | 11.0:1 | 11.0:1 |
| Starting: | Kick | Electric and kick | Electric | Electric | Electric |
| Transmission: | 6 speed | 6 Speed | 5 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain | Chain |
| Front Suspension: | Hydraulic fork, Ø 40 mm | Hydraulic telescopic fork | Ø48 mm Upside down fork, double adjustment. | Ø43 mm Upside-down fork. | Ø43 mm Upside-down fork. |
| Rear Suspension: | High strength steel swingarm, hydraulic monoshock | Swingarm with single shock absorber | Box section aluminium swingarm with cast body, hydraulic monoshock with compression and rebound adjustment | Aluminium alloy swingarm with reinforcement truss. Hydraulic shock absorber adjustable in spring preload and rebound damping. | Aluminium alloy swingarm with reinforcement truss. Hydraulic shock absorber adjustable in spring preload and rebound damping. |
| Front Brakes: | Single stainless steel disc, Ø 260 mm, floating caliper | Drum | Single Ø320mm disc, 4 piston caliper | 2 x Ø320 mm discs, 4 piston caliper | 2 x Ø320 mm discs, 4 piston caliper |
| Rear Brakes: | Single disc, Ø 180 mm, floating caliper | Drum | Single Ø240mm disc, 2 piston caliper | Single Ø240 mm disc, 1 piston caliper | Single Ø240 mm disc, 1 piston caliper |
| Front Tyre: | 90/90-21 | 3.00-21 | 120/70 -17 | 120/70 ZR17 | 120/70 ZR17 |
| Rear Tyre: | 110/80-18 | 4.00-18 | 180/55 -17 | 190/55 ZR17 | 190/55 ZR17 |
| Fuel Capacity: | 7 L / 1.85 US gal | 8.5 L / 2.2 US gal | 8.4 Litres / 2.2 US gal | 12 Litres / 3.17 US gal | 12 Litres / 3.17 US gal |