Quote:
Originally Posted by dgkli
It's important to note that Cd is related to the shape of the vehicle. not necessarily the size. You also have to consider frontal area. Drag coefficient times frontal area equals drag area. So a small vehicle with a high Cd could have the same drag area as a large vehicle with a low Cd, and it's really the drag area that determines the "total drag".
It's quite possible for a large vehicle to have a lower Cd than a small vehicle (though most large vehicles happen to be kind of boxy and many small vehicles are aerodynamically shaped.)
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Agreed, I was certainly simplifying things, but the M Coupe was not an aerodynamic car in any sense. But to your point the smaller size of the X1 compared to even the Cute Ute class will likely mean that it has significantly less overall drag than comparable SUV's and likely not much more than an E91 328iT. Add in the efficiency of the N20 combined with the ZF 8s and it really should have a sizable advantage against larger things like the Q5 and MLK.