[hypermiler01]

Simply being longer isn't what is important, but it's the way that the additional length is used to adjust the angle of the nose. That angle has a direct effect on the behavior of the air flowing both over and under the nose (as can be seen on page one of this thread, and in my picture above), and on the pressure of that air.

My argument is supported by hundreds of thousands of cars specifically designed for reduced drag, and the only reason that you don't see more of them on the street is because of ground clearance, speed bumps, dips, etc.

Basjoos's car is an example, and so is the one in my garage. Most of the others cost more than a house.