Fundamentally different from the design of the Ferrari P5/6 and Coupé 33 prototypes, the cabriolet, with its taut lines and sharp angles, demonstrates how Pininfarina was continuously pushing back the boundaries of style and efficiency. The cabriolet was built on an Alfa Romeo Type 33 sport cars chassis with a V8 mid-mounted engine, with large overhead spoiler and "beetle-wing" doors.