on the way down to southampton this weekend i noticed that my speedo was showing a speed of 85mph but my sat nav was showing a speed of 78mph, i have heard that the sat nav would be a more precise reading, is this true ?
Rocko said:If you're running larger than standard alloys this can offset your car speedo so your sat nav would be more accurate. Also depends on what sat nav you've got also.
Rocko said:Well thats my reason out the window.
That is pretty scary, difference between 3 points and not.
Rocko said:Sure I never speed anyway James