Quote:
Originally Posted by Lee
Our Subaru Outback is way off.... From memory when speedo shows 100, we are actually under 90 according to GPS and timing the speedo check signs....
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Our Liberty wagon is also quite far off, in fact I will be stepping up to 205/55R16 instead of the 205/50R16s on it now, that should put the car speed at 98-99 when the speedo reads 100.
Getting back to the OPs point, I find that on long straight runs the GPS gives a very steady reading, around twisty roads not so much. I have run 2 GPS units side by side (Garmin and Navman) and both indicated almost identical readings. In the Subaru 100 on the speedo was 93-94 on both of the GPS units.