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Optimize wrote: |
My Garmin nuvi 360 shows a consistent 3mph less speed than my BMW speedomenter. I can confim that my cards dial is 100% accurate as when I got a ticket from a cop, he measured the speed with his radar gun same as my car, while the Garmin max speed in the trip log was 3 mph leass than what I was ticketed for. I wish garmin reimburses me the ticket cost |
r.meeder3 wrote: |
My car is about 8% off above 100km/h.
Allmost all cars from the VW group (Audi, Seat, Skoda, VW, etc) have deviations of about 10% above 100 km/h. They create this deviation on purpose to prevent the speedo to give you a speed that is to low which (here in the Netherlands) is not allowed. When I hook up my OBD-II diagnosis unit to my car the speed indication is accurate to about 2 km/h from the GPS unit which shows that the deviation is added deliberately by the manufacturer. Your speedo allso changes with changes in tyre pressure, tyre wear and the use of a wrong tyre size. |
ross.bowden3 wrote: |
Hi,
Police will check your speed with the car manufacturers settings taken into consideration with their radar units. I have heard of drivers being booked for exceeding the speed limit and using their GPS as a defence, which unfortunately did not hold up in court. Trust this helps. Cheers. |
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