In the late 1940s Panhard, having put the unpleasantness of WW2 behind them, decided to experiment with aerodynamics. One result was the Dynavia. It had a 600cc flat twin (Panhard liked flat engines), a healthy 28 bhp and a top speed of a claimed 130kmh or 80mph. Seems fast for the (lack of) power so the aerodynamics must have worked. Sadly it was only a concept car, happily it still exists at the Schlumpf Collection.