Popular culture query re The Professionals

Saw the end of an old The Professionals episode on Thursday, the episode was entitled "Involvement" and was (Season 4, Episode 4). My query is this, at the end of the episode Patricia Hodge drives up in a car, a rather odd looking late 1970s car, what on earth was it? I seem to remember once finding a website that has this sort of information but can't seem to find it now.