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Old 10-04-2014, 01:34 PM   #11 (permalink)
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RX 7 road load

While the Mazda is lighter and smaller,the Pontiac had a lower Cd.The CdAs of the two cars might be closer than you think.
The weight difference won't mean anything on the open road.
If you're going for HWY mpg you're gonna have to do something to the back of the RX-7.It's contour is too aggressive and prone to attached longitudinal vortices.

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