I'm 6'4" (and a true 6'4" in bare feet) not with my stilletos at full height and find that most cars are adjustable enough to accomodate me. Even our humble little Seat Ibiza is perfectly comfortable for me as a driver, but in that car, as with other small cars it's the poor bugger who has to sit behind me who winds up a little robbed of legroom.
The 406 was very spacious and both front seats had full 8 way electric adjustment so it would accomodate just about anyone whilst still leaving plenty of rear passenger space.
Current small cars are getting very good at packaging more interior space into a smaller exterior, err, space. Engine placement and suspension design is so good now that manufacturers can make small cars feel truly spacious. The only thing that I miss in modern small cars (Micra, Peugeot 207, Toyota Yaris etc) is the interior width; elbow room, if you like.