"Decreasing range anxiety by reducing the Coefficient of Drag."
According to the aerodynamicist in the video, the new rear "spoiler" (actually more of a vestigal Kamm back, since it doesn't "spoil" the air so much as enable it to taper further down) is the most effective single mod they made:
Althought ABG lists some details about the aero mods as well, and the underbody smoothing is listed as having the largest effect:
Quote:
Those mirrors, for example, are styled after the Camry that's sold in Korea and reduce the coefficient of drag by 1.1 percent.
The rear spoiler? A 2.5-percent improvement.
The smoother underbody, which is possible thanks to there being a battery there instead of a lot of mufflers and whatnot? An 8.2-percent improvement.
All together, the aero tweaks give the RAV4 EV a cD of .30, which Toyota points out is more like a sedan than your average CUV.
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from:
http://green.autoblog.com/2012/08/06...-review-video/