quote: Toyota announced that its full hybrid electric Prius passed the 3 million worldwide cumulative sales mark at the end of June.
quote: For example, when you look at a car speeding down the motorway on a wet day you can see a cloud of spray that sort of hangs in the air and is travelling at the same speed as the car, so that car is dragging along maybe several kilos of air behind it all the time, which isn't part of the payload and is wasting fuel. I think a car which has a roof that slopes towards a tail would have less air being dragged behind it, thus it would be more fuel efficient
quote: Whether this is real or just perceived, the "Prius shape", especially the "sloping towards a tail" roof, is becoming more popular and is now appearing in other brands and car types.
quote: Aerodynamicists have long known that a smooth continuous surface from nose to roof minimizes drag.