[serialk11r]

I'm skeptical about cooling causing so much drag. Twice the power does not mean twice the cooling drag necessarily. A bigger radiator would give you a lot more cooling capacity for the same air flow. You would think that with a bigger engine and a bigger turbo that they would add a bigger radiator as well.

I still say, the 0.22 is BS, they probably measured it without a "treadmill" which reduces drag from the wheels and underbody. Other car companies have wind tunnels too, you'd think at least *some* car some other company comes up with would have great aerodynamics, especially considering how there are coupes with good plan taper out there vs. the CLA sedan. If you believe the 0.22, then MB understands some aero black magic that no one else does, but then as you can see the CLA45AMG isn't doing so well at 0.32, so there's a contradiction somewhere.

Also a little more on the original topic, the McLaren P1 has a 0.34? Cd, and that's with fat tires + cooling ducts everywhere, and the wing has that bend in it that can't be good for drag when in the down position. It's got much better downforce and stability at speed than a lot of the other supercars, so maybe this isn't so much a design goal problem as it is a problem with poor design.