Good Morning at the speeds shown on Sat Navs accurate?

[Pat Vegas]

Or is it common for a 2-5PM discrepancy between the Sat Nav and the speedometer?

[71 Guns - channeling the spirit of Mr Hat]

[Maravilloso Marvo]

Your speedometer adds around 10% on to make sure you don't 'speed' and so you think your car is quicker than it is. They call it tolerance....

[Pat Vegas]

and speedometer.

[Mack]

distance and causing the speed to be lower than the true speed and vice versa for under inflated. Sat navs are more consistently accurate. :science:

[Pat Vegas]

But that's it.

[pjlincs]