NSU Lambretta / Prima (specifications for the Prima) (1950-57) vs NSU Fox (1949-54)
Comparison technical specifications
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| Make: | NSU | NSU |
| Model: | Lambretta / Prima (specifications for the Prima) | Fox |
| Years: | 1950-57 | 1949-54 |
| Engine: | Single cylinder, 2 stroke | Single cylinder, OHC |
| Capacity: | 150 cc / 7.6 cub in | 98 cc / 6 cub in |
| Bore x Stroke: | 57 x 57.6 mm | 50 x 50 |
| Cooling: | Air cooled with blower | Air/Oil cooled |
| Lubrication: | Oil bath | Oil pump |
| Starting: | Electric | Kick start |
| Spark plug: | E3.32 | W225 T1 |
| Exhaust System: | Single exhaust | Single exhaust |
| Max Power: | 4.6 kW / 6.2 hp @ 4500 rpm | 4.4 kW / 6 hp @ 6500 rpm |
| Transmission: | Three speed gearbox, with twist grip gear selection | 3 Speed, (since 1950: 4 speed) |
| Final Drive: | Shaft | Chain in oil bath |
| Font Suspension: | Bottom link suspension | Coil springs . with adjustable friction dampers |
| Rear Suspension: | Swinging arm with dual coil springs and hydraulic telescopic shock absorber | Short swingarm with central coil spring, with adjustable friction dampers |
| Frame: | Rigid tubular steel frame, rubber mounted noise-isolated body | Central clamping frame, pressed steel |
| Dimensions: | Length 1905 mm / 75 in Width 686 mm / 27 in | Length 1910 mm / 75.2 in |
| Wheels: | 4.00 x 8 in | 19 x 2.5 in, spokes, high pressure tyres |
| Rear Brake: | Drum | Internal shoe |
| Tank Capacity: | 7.6/ 2 US gal | 6.5 l / 1.7 US gal (Since 1950: 8 l / 2.1 US gal) |
| Average Consumption: | 2.7 l/100 km / 37 km/l / 87 US mpg | 1.9 l/100 km / 52.6 km/l / 123.9 mpg |
| Top Speed: | 85 km/h / 52.8 mph | 85 km/h / 52.8 mph |