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| The Pub For General Automotive Related Talk |
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18-09-2008, 07:28 PM
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Regular Member
Join Date: Aug 2008
Location: Melbourne, Vic
Posts: 421
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G'day all
Just wanted people's opinion on which is more accurate... the speedo or GPS sat-nav unit? I'm currently renting a car while I wait for delivery of my new one, and notice that the speedo and my portable sat-nav unit (Navman S90i) differ significantly. I didn't really notice a significant difference on my old car. eg. Speedo shows ~72km/h; GPS shows ~80km/h The difference is even greater when speeds reach 100+ km/h. I know speedos can be affected by things like tire pressure, etc., and the GPS accuracy depends on how many satellites are in view, but the GPS location seems spot on - eg. I will cross over a bridge just as the GPS unit shows I'm crossing a bridge etc. Thoughts? |
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Speedo vs. GPS
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