<P> The sport's history parallels the evolution of its technical regulations . In addition to the world championship series, non-championship Formula One races were held for many years, the last held in 1983 due to the rising cost of competition . National championships existed in South Africa and the United Kingdom in the 1960s and 1970s . </P> <P> Formula One was first defined in 1946 by the Commission Sportive Internationale (CSI) of the FIA, forerunner of FISA, as the premier single seater racing category in worldwide motorsport to become effective in 1948 . It was initially known variously as Formula A, Formula I or Formula 1 with the corresponding "Voiturette" formula being titled Formula B, Formula II or Formula 2 . When the 500c formula was internationally recognised as Formula 3 in 1950 it was never titled as "Formula C" so the three International Formulae were "officially" titled Formula 1, Formula 2 and Formula 3 . </P> <P> In the beginning, the formula was largely based on pre-World War II regulations defined by engine capacity . The regulation expected to bring a new balance between supercharged and normally aspirated cars . Non-supercharged 4.5 - litre pre-war Grand Prix cars were allowed to race against the pre-war 1.5 - litre supercharged' voiturettes', while pre-war supercharged 3 - litre Grand Prix cars were banned . The first race under the new regulations was the 1946 Turin Grand Prix held on 1 September, the race being won by Achille Varzi in an Alfa Romeo 158 Alfetta . </P> <P> Championships for drivers or constructors were not introduced immediately . In the early years there were around 20 races held from late Spring to early Autumn (Fall) in Europe, although not all of these were considered significant . Most competitive cars came from Italy, particularly Alfa Romeo . Races saw pre-war heroes like Rudolf Caracciola, Manfred Von Brauchitsch and Tazio Nuvolari end their careers, while drivers like Alberto Ascari and Juan Manuel Fangio rose to the front . </P>

Who won the first ever formula 1 race