This is a Saab 900 Speedster (speeder) prototype from 1984, and It was developed by designer Leif Mellberg (who was also the designer of Saab EV1 prototype) in collaboration with the Swedish car magazine “Teknikens Varld“. It’s based on a trimmed Saab 900 “Classic” model, but shorter.
This prototype still exists in France and belongs to a private individual, french ex-racing driver called Vincent Villanueva who is also one of the founders of the Saab Oficial concessionaire in the city of Bayonne situated in the south of France in the so called French Basque Country.