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I think GM is right on with these numbers.
Comparing different cars in the same windtunnel is the only way to get an accurate comparison.
It is also reasonable that the larger tires on the Prius V add atleast 30 counts of drag, based on data from other manufactures.
This means the base Prius would be .27 compared to the Volts .28, as tested in GMs windtunnel. Meaning the Prius would stiil be the most aerodynamic choice.
Also, where is the statement from Toyota? Anybody find one?
As far as the EV1 goes, the difference in drag is probably due to the new testing standards, that include rolling wheels and a simulated moving road. I don't think anybody was using those back in the 90s.
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