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Old 11-15-2012, 05:40 PM
KP49 KP49 is offline
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Location: Knoxville, TN
 
Join Date: Nov 2012
Posts: 42
Mein Auto: 2013 X1 35i
Quote:
Originally Posted by greyX1 View Post
wind resistance (drag) increases with the 2nd power of velocity. at slow speeds (low turbulence) differences in velocity are less significant, but in the 70/75 range, the difference in drag, and therefor MPG, can be large. i wouldn't totally discount the speedo "error" as a marketing device for owners to achieve seemingly better MPG, and even faster apparent acceleration times!

curious though - don't Germans pride themselves on always being on time? or is that just the Swiss-Germans? they still drive BMWs too though....
Wonder if the euro spec cars are off by 6.5-8kph
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