The Alfa Romeo P2 won the inaugural Automobile World Championship in 1925, taking victory in two of the four championship rounds when Antonio Ascari drove it in the European Grand Prix at Spa and Gastone Brilli-Peri won the Italian Grand Prix at Monza after Ascari died while leading the intervening race at Montlhery.
The 1930 P2 won the Targa Florio in the hands of Achille Varzi, who broke the average speed record for the race.
Image: Alfa Romeo P2
In an internal combustion engine, a supercharger compresses the intake gas, forcing more air into the engine in order to produce more power for a given displacement.
Roots-type supercharger (right) on a 2006 GM Ecotec LSJ four-cylinder engine
Internals of a rotary-screw (Lysholm) supercharger
1929 Blower Bentley with the supercharger ("blower") located in front of the radiator
Centrifugal supercharger for a Bristol Centaurus radial engine