Quote:
Originally Posted by Dackelone
Speedo's lie. Most read 3 to 5% higher than actual speed. The car still is limited to 155 mph - if you had a GPS you would see that. 95% of 164 mph = 155mph.
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Yup! A friend of mine (not me
) tried a top speed run in a Z4MC on CA's i-5 straight when there was no traffic. The speedometer was compared to GPS logging.
Speedo read 160+ mph, while the GPS registered a high of only 151mph. That's about 5% difference between speedo and actual.
Didn't get to try out the tune the car had, to see if it really was unlimited past 155mph. Maybe next time
