The Fiat 509 is a small car produced by the Italian automaker Fiat from 1925 to 1931. It was designed as an affordable vehicle for the masses, featuring a four-cylinder engine and a lightweight body. The 509 was known for its reliability and efficiency, making it popular among families and small businesses. This model was part of Fiat's strategy to expand its market presence during the interwar period. The Fiat 509 came in various body styles, including a two-door sedan and a convertible, catering to different consumer preferences and needs.