I'm a bit embarrassed that I didn't recognise it at first, because I've seen these two pictures loads of times. As you probably know, I own a Fiat X1/9, and because of that, I've been through most websites that have information on the car... and this one turns up now and then. It's the 1981 Bertone Icsunodieci (X1/10) concept, meant to explore what the X1/9 could evolve into.