Which is more accurate

By *aravancouple OP Man over a year ago

A Secret Hideaway In the caravan of love

Coming home today on the motorway my Speedo was showing 70 but my Sat Nav was showing 66 so which is right.

Carol

By (user no longer on site) over a year ago

"Coming home today on the motorway my Speedo was showing 70 but my Sat Nav was showing 66 so which is right.

Carol

Your sat nav is nearer being right, it works via gps, average speedo is anywhere between 5 & 10% out at 70mph