Interesting thread for me as I've tested all my cars against Gps and in every case the speedometer in the car has been optimistic. Typically for a gps reading of 70 mph the car says 74 or 75. At 30 on gps cars read 33 or so.
You never can tell with science!
Nick
Last edited by nick w; 06/06/21 11:12 AM.
