The website states the IC engine has not yet been selected. This will have a large bearing on cost and highway FE. Biodiesel has the best shot at being efficient and sustainable. If I wanted to get 290 mpg at 70 mph then I would ditch the electric drive in favor of a wide range gear box. The passenger seat could be moved back and in tighter to reduce overall width. Rear steering is not known to be stable at those speeds. I take it that this design is aimed more toward urban use.
Last edited by Grant-53; 01-18-2014 at 12:06 AM..
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