A few weeks ago had sat nav unit fitted using tomtom software,
have just noticed that you can switch over to see the speed of the car displayed, the car speedo appears to read approx 10% faster than the sat nav, which one is likely to be more accurate.
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satnav. Car speedo is permmited to read between +0 and +10% of actual speed. Manufacturers err on the high side for a variety of obvious reasons.
John
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Will the TT GO300 or GO500 do the same?
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Espada III - well if you have a family and need a Lamborghini, what else do you drive?
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Yes TTGo 300/500/700 have a speed display int he information bar at the bottom o fthe scrolling map/route
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My Tomtom Go 500 is similar - speedo on 75 tomtom says 71.
As stated, I think it's generally the case that car speedos read slightly higher than true.
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My 307 speedo reads 3 mph faster than GPS across the speed range and checked against 2 different GPS devices.
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