This amazingly trapezoid concept for Citroen was, apparently, designed by the mysterious personage of Trevor Fiore.
Now, we're not sure wether this fellow's real name was Trevor Frost, or wether the 'Fiore' was simply a nom de plume when designing cars for foreign carmakers. A wander around the webs will shore up any number of theories and attributions our Trevor.
Whoever he was, he seems to have been responsible some interesting concepts, particularly from the purely aesthetic level.
The Karin three-seater was commissioned in advance of the 1980 Paris show and built in collaboration with Carrozeria Coggiola (the atelier responsible for Saab's Sonnet 3 and 9000 as well as the original Mégane concept).
This was obviously Citroen demonstrating their preparation for a technologically advanced, future characterised by outside the box thinking and low drag coefficients - but you can also see the influence of what had been there before in the company's back catalogue.