Vespa P150S / P150X




Make Model

Vespa  P150S / P150X


1978 - 90


Two stroke single cylinder,


149 cc / 9.1 cub in
Bore x Stroke 57.8 x 57 mm
Compression 8.2:1
Carburetor Dell'Orto SI 20/20 D
Cooling Air cooled, forced

Fuel Mixture

Ignition Contact breaker and coil
Starting Kick start
Battery 12V
Clutch Wet, multiplate

Max Power

5.5  kW / 7.5 hp @ 5750 rpm


4 Speed, grip-shift, constant mesh
Gear Ratios 1st 14.47 / 2nd 10.28 / 3rd 7.31 / 4th 5.36:1
Final Drive Direct drive
Frame Pressed sheet steel, streamlined monocoque structure

Front Suspension

Trail arm with coil spring and damper

Rear Suspension

Coil spring with damper

Front Brakes

125 mm drum

Rear Brakes

127 mm drum
Wheels Interchangeable

Front Tyre

3.5 x 8"

Rear Tyre

3.5 x 8"


Length:  1740 mm / 68.5 in

Width:      670 mm / 26.4 in


1200 mm / 47.2 in

Dry Weight

98 kg / 216 lbs

Fuel Capacity 

7.5 L / 2.0 US gal

Consumption  average

2.1 L/100 km / 48 km/l / 112 US mpg

Acceleration: 0 - 75 km/h /

                             47 mph

17.5 sec

Top Speed

90 km/h / 56 mph


Blue, Blue/Green, Silver, White




Vespa P series was the last of the "classic" Vespas to come out of Piaggio's factories.  though certainly not the most elegant styling, the P-series Vespas are probably the sturdiest models.

In the mid-70s the basic Vespa design had been refined almost as far as it was able to go.  However, changing consumer tastes, and new technologies, coupled with tightened regulations meant that Piaggio realised that it was time to totally re-design the Vespa chassis.  The result was the P-series.  It was such a large break from the previous style and design philosophy that many hard-core scooterists did not consider the P-series to be true  Vespas, even well into the 90's.  It is a debate that still continues, though the influx of new automatic scooters has tempered it and helped propel the P-series into the ranks of the classics.

On the P everything was bigger. the frame was newly designed and h=physically much larger than nay of the previous models.  The cowls were more angular.