The Alfa Romeo 105 and 115 series coupés were a range of cars produced by the Italian manufacturer Alfa Romeo from 1963 until 1977, based on a shortened floorpan from the Giulia saloon. They were the successors to the Giulietta Sprint coupé. The basic body shape shared by all models was designed by Giorgetto Giugiaro for Bertone. A small number of the GT Junior Zagato were also built with a very different, aerodynamic two-seater coupé body designed by Ercole Spada for Zagato of Milan.

The 105 series coupés featured the GT (Gran Turismo) model description, which was common to all models in one form or another. he 1300 Junior and 1600 Junior also became available with a very different, aerodynamic two-seater coupé body designed by Ercole Spada for Zagato of Milan. the 105 Series coupé models were rationalized and these external features became common to post-1974 GT 1300 Junior and GT 1600 Junior models, with only few distinguishing features marking the difference between models.

The Junior Z was introduced at the Turin Motor Show on November 1969. The Alfa Romeo Junior Z was a limited production two-seater coupé with aerodynamic bodywork by Zagato of Milan. The kamm tail wedge-shaped body was designed by Ercole Spada at Zagato.