These cars went into production in 1923 as the 6/25/40 hp (regarded as the first supercharged road car[8]) and 10/40/65 hp.[9] These were normal road cars as other supercharged cars at same time were almost all racing cars, including the 1923 Fiat 805-405, 1923 Miller 122[10] 1924 Alfa Romeo P2, 1924 Sunbeam,[11] 1925 Delage,[12] and the 1926 Bugatti Type 35C. At the end of the 1920s, Bentley made a supercharged version of the Bentley 4½ Litre road car. Since then, superchargers (and turbochargers) have been widely applied to racing and production cars, although the supercharger's technological complexity and cost have largely limited it to expensive, high-performance cars.