The Edison 2 is one of only two entries remaining in the 4 passenger, 200 mile range mainstream car X-Prize class.
Its a pretty amazing car that get a hundred miles per gallon, and can go a hundred miles per hour. The main ingredients are light weight, low drag, and an efficient (non-hybrid) internal combustion power plant.
This is nearly five times our current US fleet average mpg, and twice as good as a Prius!
The Edison website is good and brings up a number of interesting points about designing and efficient and safe car.
More on efficient and solar cars on our Solar Vehicles web page...
Gary