Upon further research, it appears to be a design proposal for the Autobianchi/Lancia A112 replacement (Y10). The process began in 1978 and involved Vittorio Ghidella, Pier Giorgio Tronville, Mario Maioli and Tom Tjaarda of Fiat, Giugiaro/Italdesign, and Pininfarina. (I am not sure of the designer of this particular proposal, but it resembles drawings submitted by Pininfarina.) Here is the same car shown from the front.