Vespa 125 GT/Sprint, GTR, TS, Primavera ET3, P125X (1966-73) vs KTM RC 390 (2014-15) vs Vespa 50 Allungata (1967-71)
Comparison technical specifications
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| Make: | Vespa | KTM | Vespa |
| Model: | 125 GT/Sprint, GTR, TS, Primavera ET3, P125X | RC 390 | 50 Allungata |
| Years: | 1966-73 | 2014-15 | 1967-71 |
| Engine: | Two stroke, single cylinder | Four stroke, single cylinder. DOHC with finger followers, 4 Valve per cylinder | Two stroke, single cylinder |
| Capacity: | 121.2 cc / 7.4 cub in | 373 cc / 22.7 cu-in | 49.8 cc / 3.0 cub in |
| Bore x Stroke: | 52.5 x 57 mm | 89 x 60 mm | 38.4 x 43 mm |
| Starting: | Kick start | Electric | Kick start |
| Clutch: | Multiplate | Wet multi-disc clutch / mechanically operated | Multi plate |
| Max Power: | 3.4 kW / 4.6 hp | 32 kW / 43 hp @ 9500 rpm | 1.9 kW / 2.6 Hp @ 4500 rpm |
| Transmission: | 4 Speed, grip-shift, constant mesh | 5 Speed | 3 Speed |
| Final Drive: | Direct drive | Chain 5/8 x 1/4” X‑Ring | Direct drive |
| Frame: | Pressed sheet steel, streamlined monocoque structure | Tubular space frame made from steel, powder-coated | Sheet metal, welded support |
| Front Suspension: | Elastic with coil spring and hydraulic shock | WP Suspension Up Side Down | Hydraulic shock absorber with rubber elements |
| Rear Suspension: | Elastic with coil spring and hydraulic shock | WP Monoshock | Hydraulic shock absorber |
| Front Brakes: | Drum | Single 300 mm disc 4 piston radial caliper | Drum |
| Rear Brakes: | Drum | Single 230 mm disc 1 piston caliper | Drum |
| Front Tyre: | 3.0 x 10" | 110/70 R17 | 2.75 x 9" |
| Rear Tyre: | 3.0 x 10" | 150/60 R17 | 2.75 x 9" |
| Dry Weight: | 73 kg / 161 lbs | 139 kg / 306.4 lbs | 67 kg / 148 lbs |
| Fuel Capacity: | 5.5 L / 1.5 US gal | 10 Liters / 2.64 lbs | 5.6 L / 1.5 US gal |