Aprilia SR Motard 50 (2015) vs Aprilia Tuono 1000 R Factory (2008) vs Aprilia RS 125 R osso Fluo (2008) vs Ariel VH 500 Red Hunter (1932-59) vs Aprilia RS4 125 (2019-20)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia | Ariel | Aprilia |
| Model: | SR Motard 50 | Tuono 1000 R Factory | RS 125 R osso Fluo | VH 500 Red Hunter | RS4 125 |
| Years: | 2015 | 2008 | 2008 | 1932-59 | 2019-20 |
| Engine: | Four stroke, single cylinder, 4 valves | Four stroke, longitudinal 60°V twin, DOHC, 4 valves per cylinder | Single cylinder, two stroke, reed valves induction | Four stroke, stroke, single cylinder, OHV, 2-valves | Four stroke, single cylinder, DOHC, 4 valves |
| Capacity: | 49 cc / 3.0 cu in | 997.6 cc / 60.9 cu in | 124.8 cc / 7.5 cu in | 497 cc / 30.3 cu in | 124.8 cc / 7.6 cu in |
| Bore x Stroke: | 39 x 41.35 mm | 97 x 67.5mm | 54 x 54.5mm | 86.4 x 85 mm (after 1936: 81.8 x 95) | 58 X 47 mm |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Air cooled | Liquid cooled |
| Lubrication: | Wet sump forced lubrication system with mechanical pump | Dry sump with separate oil reservoir. Double trochoidal pump with oil cooler. | Separate mixing, volumetric pump | Dry sump with dual plunger pumps | Wet sump |
| Induction: | Keihin NCV F20 carburetor | Integrated electronic engine management system. Indirect multipoint electronic injection, Ø57 mm throttle bodies. | Dell'Orto PHBH 28 carburetor | Carburetor, large bore down draught Amal | Magneti Marelli M3G ø 32mm ECU |
| Starting: | Electric and kick | Electric | Electric | Kick start | Electric |
| Max Power: | 3.4 kW / 4.6 hp @ 9500 rpm | 102 kW / 139 hp @ 9500 rpm | 21 kW / 28 hp @ 10500 rpm | 17.9 kW / 24 hp @ 6000 rpm | 11.7 kW / 16 hp @ 10500 rpm |
| Transmission: | Continuous automatic variator | 6 Speed | 6 Speed | 4-Speed | 6 Speed |
| Final Drive: | V-belt | Chain | 17:40 | Chain | Chain: 60/13 (4.61) |
| Frame: | High strength steel single cradle | Box section sloping twin-spar frame in aluminium alloy. Removable aluminium alloy saddle mount frame. | Cast aluminium, reinforced box section, sloping twin-spar frame | Semi double cradle | Aluminum perimeter frame |
| Front Suspension: | Telescopic hydraulic fork | Öhlins Racing Ø43 mm upside-down fork with adjustment for spring preload, compression and rebound damping | Upside-down forks, Ø 40mm | Grider front forks | Ø41 mm Upside down fork |
| Rear Suspension: | Engine acts as a swingarm, one hydraulic shock absorber with preload adjustment | Aluminium alloy double member swingarm. APS (Aprilia Progressive System) rising rate linkages. Öhlins Racing piggy-back monoshock with adjustment for spring preload, compression and rebound damping. | Monoshock, cast aluminium box section swingarm with asymmetric members | Rigid, springloaded saddle (after 1954: dual shocks) | Asymmetric swingarm with monoshock |
| Front Brakes: | Ø220 mm Disc brake with two-piston floating caliper | 2 x Ø320mm floating discs, stainless steel, 4 piston calipers, Brembo Gold | Single 320 mm floating discs, 4 piston radial caliper | Drum | Single 300 mm disc, 4 piston caliper |
| Rear Brakes: | Ø140 mm Drum brake | Single Ø220 mm stainless steel disc, 2 piston caliper, Brembo Gold | Single 220 mm disc, 2 piston caliper | Drum | Single 218 mm disc, 1 piston caliper |
| Dimensions: | Length: 1940 mm / 76.3 in Width: 720 mm / 28.3 in | Length: 2025 mm / 79.7 in Width: 830 mm / 32.7 in Height: 1100 mm / 43.3 in | Length: 1955 mm / 77.0 in Width: 720 mm / 28.3 in Height: 1100 mm / 43.3 in | Length: 2180 mm / 85.8 in Width: 640 mm / 25.2 in | Length: 1953 mm / 76.8 in Width: 760 mm / 29.9 in Height: 1135 mm / 44.6 in |
| Fuel Capacity: | 7 Litres / 1.9 US gal | 18 L / 4.8 US gal | 14 Litres / 3.7 US gal | 14.8 L / 3.9 US gal | 14.5 Litres / 3.8 US gal |