But Cd is only part of aerodynamic drag - drag is actually proportional to CdA (i.e. Cd x A), where A is the frontal area. In other words, minimizing the frontal area is just as important as streamlining the shape.
https://en.wikipedia.org/wiki/Automobil ... #Drag_area
You know how I can tell you didn't finish reading this article?
Huh. In my defense, I did read the entire article, but not the sidebar. I guess I'm used to other web sites where boxes contain ads or pull quotes, not sidebars with useful info.