[Fishlips]

Lynn,

Here is the equation for total drag.

Total Drag:

D=CDA p/2 V2

Where
CD= Coefficient of Drag

A= Frontal Area

p= density of ambient air

V2= vehicle speed squared

This is a big difference when you compare a Cobalt or somthing little to the Older Super Stockers with a big wide front and tall roof line.

I believe your calculations used cars with similar frontal areas.