Yep that's it! The 5 turbo you have on that photo, or the one standing next to it, has a nice anekdote, it's the prototype version, and they wanted to display it for the Paris motorshow, I think it was 1978 or 1979, but the car wasn't ready, so they ended up displaying the car with a wooden fully flat underside, also covering big parts of the wheelarches. And at the show all those little japanese copycats at the times were taking a lot of photo's of the underside of the car. Probably wondering afterwards, how it would be possible to turn the wheels, and how limited the suspension must be.