In message , Graeme
writes
nteresting numbers, how old is your car? My two year old Laguna measures a
lot closer to the limits than that, 73mph indicated gives just about 70 on
the Sat Nav.
Between SWMBO and me, we have two cars, both with sat-navs. I've tried
both together in both cars and the are in agreement, one a tomtom the
other a Garmin. At 70mph on both sat-navs the 52 Nissan Almera is
indicating 77mph and the 09 Toyota Auris is indicating 72mph.
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Clive