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Originally Posted by RocketSled
And yes, the reason for the C5 Z's lower top speed is the difference in CD that results from going from a hatch-back to a notch-back top. The extra HP isn't enough to make up for the higher CD.
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Actually the top speed of the C5 Z06 is limited by the 6600-engine-rpm "soft limiter," in fifth gear @ approximately 173-mph;
not from aerodynamic drag. If you increase the rev limit it can run well over 180-mph.
