The Alfa Romeo Giulietta (series 750 and 101) was manufactured from 1954 to 1965. The first Giulietta model was a Bertone designed coupé, the Giulietta Sprint, introduced in late 1954. This was followed by a sedan in the spring of 1955 and in mid 1955, the Giulietta Spider with bodywork by Pininfarina. The Giulietta used an Alfa Romeo Twin Cam engine of 1290 cc straight-4, with light alloy cylinder block and alloy cylinder head with twin overhead camshafts. The original Giulietta engine produced a power output of 53 hp in the sedan and 80 hp in the Giulietta Sprint. This was to be increased to 116 hp in later special models like the Giulietta Sprint Speciale and the Giulietta Sprint SZ.