Im 6'7" and I fit in my rx8 with another 3 full grown adults (6' up) with plenty of room
I can't comfortably sit in the drivers seat in the sunroof model cus I don't like to lean back too much, but thats just me.. I can't see this being that much smaller internally, all they have to do is make it a 2+2 rather than a 4 seater like the 8