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Old 10-19-2012, 06:42 AM
richschneid richschneid is offline
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Location: Pittsburgh, Pa.
Join Date: Nov 2005
Posts: 1,698
Mein Auto: 2015 i8 Tera World
About 10 years ago Car and Driver tested various cars about the accuracy of the speedometer readings. BMW was by far the most consistently optimistic speedometer reading. I have had five BMWs since 1992. Each one has had about he same error in the speedometer. At highway speeds the speedometer is usually about 3mph over the actual speed. I think the error is a percentage, so that the faster the car is going the larger the speedo error.
2015 i8 Tera World Protonic Blue
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