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Not trying to steal the thread here but, if you wish the calculate the difference in percentage, most terms cancel out, and the number is indeed staggering.
The logical conclusion is to fold up one's rear view mirror at high speed (sorry bad joke, really dangerous) I did however ask BMW why they block off the fog lamp area where intake would have been if intakes are on both sides. My ***very crude*** guess is gaining 20 hp at 200 km/h if air is well transferred there....
But, people designing F20 must be thinking about something else and I really wonder what they're thinking, especially they got that unlimited highways in Germany. Surely they are experts in this aero stuff, but man, maybe now is hindsight, but the F30 and the new A class sure have better numbers....
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