This is where the drag coefficient — which measures ... Shedding weight also improves a car's acceleration and top speed. For example, the Ford Mustang GTD achieves its impressive 202 mph ...

Proving yet again that good ideas don't automatically make for good products, this innovative car design was ahead of the game but stumbled at the final hurdle.

While the A6 eTron remains Audi's most aerodynamic vehicle with a drag coefficient of 0.21, this new car isn't far behind, ...