The Alfa Romeo BAT is an Italian idea automobile. The vehicle came from a joint collusion project between Alfa Romeo and the Italian design house; Bertone that started in 1953. Of the successful project came 3 automobiles: the BAT five in 1953, the BAT seven in 1954, and lastly the BAT nine in 1955. Alfa Romeo approached Giuseppe "Nuccio" Bertone of the Bertone design house straight to commission 3 idea cars with in depth research on the effect of drag on a vehicle. The idea was to make automobiles with the lowest possible drag coefficient. The automobiles where named BAT for "Berlinetta Aerodinamica Tecnica." all of the cars featured big rear bumpers and curved fins, really a singular design. They were built upon the Alfa Romeo 1900 frame. Every year between 1953 and 1955 at the Turin automobile show, Bertone and Alfa Romeo presented a BAT idea, the BAT five, seven and nine.