My first car was a 1966 Renault R-8. It featured rubber floor mats (no carpeting), a 4 cylinder engine in the back, and a unique hood with a "V" shaped crease done the middle. It got 35 MPG back when gas was $.35 per gallon.
I jazzed it up by installing a Radio Shack radio with FM mono. Later I added an underdash 8-track player. It was rockin'...
The car had one other, er, "useful" feature: the seats went ALL the way back...