[Cd]

I agree that has to be the Cd of the hatch.
The previous generation ( 92-95 ) actually had a better Cd for the hatch versus coupe ( .31 vs ..32 )
Amazing what a slight change in window angle can do to destroy a cars drag.

After seeing such big improvements from such little changes, it makes me wonder why car manufacturers brag about how many hundreds of hours they spend on a car to get the Cd down two or three counts.