Hi,
I just found out about another old beauty, that is pretty aerodynamic: the Saab 92001 also known as the UrSaab:
The Cd is 0.32, so not quite as impressive as the Tatra T77A, but I suspect the latter was calculated w/o the bumpers, etc. I like the front wheel drive, and I like the size of the UrSaab, too.