Perhaps many of you have seen this already... it was posted here - but the link no longer works. Luckily, MetroMPG cited his source (I appreciate that) so I did a quick journal search and found the article. Lucky me, it was full text with photos :P
Here they are - with captions. I'd post the entire article, but I don't want to risk loosing this service
One of the two variant shapes, rendered as a one-third-scale clay model, undergoes wind tunnel testing and refinement. A full-size model with features would follow.
The EV1 test mule served the engineers as a full-size wind tunnel form with which they could evaluate features drag. The PNGV body shape developed along a parallel path.
I say - hooray for duct tape!
This is a graphical representation of the many details leading to low drag and high style. Tumble home increased as the designers raised the roof. So did the frontal area.
By wearing its cooling-air intakes on the rear fenders--a benefit that comes with mounting the engine in back--the new shape borrows from sibling EV1's success with low ram air inlet.