Siata 750 Spider Corsa

The Siata 750 Spider Corsa Bresciana was a one-off competition barchetta constructed in 1948 in Brescia, Italy, utilizing mechanical components derived from the Fiat 500B Topolino and performance modifications supplied by Siata (Società Italiana Auto Trasformazioni Accessori). The vehicle was designed and built by Carrozzeria Bresciana, operated by the Fenocchio brothers, whose workshop produced specialized lightweight bodies for local sporting use during the immediate post-war period. The chassis was adapted from the Fiat 500B, modified to accommodate weight reduction and reinforcement for competition purposes. The engine was a four-cylinder, side-valve inline unit with a displacement of 742 cc, modified by Siata. Enhancements included a high-compression aluminum cylinder head, revised intake, and twin carburetor setup. Output was estimated at approximately 30 to 35 horsepower, a substantial increase over the stock unit. The transmission was a four-speed manual, retained from the donor vehicle, as were the rear-wheel-drive layout and mechanical braking system. The body was executed in aluminum, formed by hand into a minimal barchetta configuration. It featured a low-cut windscreen, open cycle fenders, external fuel filler, and a simple, stripped interior optimized for weight savings. The design conformed to early Italian postwar sports car proportions, emphasizing compactness and functionality over ornamentation. Only one example is confirmed to have been constructed. The vehicle carried chassis and engine number 133748, indicating a unified build and singular production. It was retained by the Fenocchio family and is believed to have competed in regional hillclimbs and short-course circuit events in the late 1940s and early 1950s. It resurfaced in later decades in private ownership and has been observed at historic motoring events, including retrospective Mille Miglia gatherings. No other units of this configuration are documented. The Siata 750 Spider Corsa Bresciana represents a unique intersection of regional craftsmanship, component-based engineering, and local competition culture. It exemplifies the ingenuity and austerity of Italian sports car development in the post-conflict period and remains an isolated but illustrative example of the barchetta form adapted to small-displacement racing applications.