Vespa 125, P125X, PX 125, PX 125 Arcobleno/Lusso, PK125 S, GTS Super (1977-97) vs Aprilia RS 125 R (1997-98)
Comparison technical specifications
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| Make: | Vespa | Aprilia |
| Model: | 125, P125X, PX 125, PX 125 Arcobleno/Lusso, PK125 S, GTS Super | RS 125 R |
| Years: | 1977-97 | 1997-98 |
| Engine: | Two stroke, single cylinder | Single cylinder, two stroke, reed valves induction |
| Capacity: | 123.4 cc 7.5 cub in | 125 cc / 7.6 cu in |
| Bore x Stroke: | 52.5 x 57.0 mm | 54 x 54.5mm |
| Compression Ratio: | 9.2:1 | 14.5:1 |
| Ignition: | Flywheel alternator, with built in H.T. coil | Electronic |
| Starting: | Kick start | Electric |
| Max Power: | 5.9 kW / 8 hp @ 5800 rpm | 24.8 kW / 34 hp @ 11000 rpm |
| Max Torque: | 10.5 kW / 1.07 kgf-m / 7.7 ft/lb @ 4500 rpm | 25 Nm / 2.5 kgf-m / 18.4 lb-ft @ 9000 rpm |
| Transmission: | 4 Speed, grip-shift, constant mesh | 6 Speed |
| Final Drive: | Direct drive | Chain |
| Front Suspension: | Helical spring and double acting hydraulic dampers | Upside-down forks, Ø 40mm |
| Rear Suspension: | Helical spring and double acting hydraulic dampers | Monoshock |
| Front Brakes: | Drum, 125 mm | Single 320 mm discs, 4 piston caliper |
| Rear Brakes: | Drum, 125 mm | Single 240 mm disc, 2 piston caliper |
| Front Tyre: | 3.5 x 10" | 110/70-17 |
| Rear Tyre: | 3.5 x 10" | 150/60-17 |
| Dry Weight: | 112 kg / 247 lbs | 115 kg / 254 lbs |
| Fuel Capacity: | 8 L / 2.1 US gal | 11.5 L / 3.0 US gal |
| Consumption average: | 2,7 L/100 km / 37 km/l / 87 US mpg | 5.1 L/100 km / 19.5 km/l / 45.9 US mpg |
| Top Speed: | 100 km/h / 62 mph | 171.3 km/h / 106 mph |