Despite the rain, this year’s edition of the Goodwood Festival of Speed is proving to be the most exciting motor show of 2016. Renault has a big part to play, having brought several types of fantastic cars, both old and new.

Our attention is being fixated on the three blue speed machines, separated by several decades. Compared to the Megane RS, they seem a little crude, with leather hood straps and wood dashboards, but these were som…