[Pat123]

The C6 coupe aero signature was shaped with more than 400 hours in the wind tunnel. They acheived a drag coefficient of .28. Pretty impressive number considering the larger front opening and the smaller dimensions of the C6 which both serve to hurt the aero signature. The C6 Z06 has a drag coefficient of .34 as published by GM, .31 as tested by a third party in their wind tunnel. Finally, the ZR1 has a drag coefficient of .36, a 6% increase over that of the Z06 due to the additional ground effects and the additional air being ducted for cooling.

The C5 coupe in contrast has a drag coefficient of .29. The C5 convertible has a drag coefficient of .32 and the fixed roof coupe design which became the C5 Z06 has a drag coefficient of .31.

I don't have the numbers for the C6 convertible but I've asked the question and hopefully can get an answer back.

Talon - I am assuming that the lower drag coefficient is better but from the way you said it I am not sure?