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    Ask Smithy Xtra Speedo tells me I'm speeding

    Holden Holden Advice Holden Commodore Holden Commodore Advice Holden Commodore 1994
    When I?m going 100 km/h in my VR Commodore wagon, and go under an overhead speed check, it says I?m doing 99 km/h, but my GPS says I?m doing anything from 103-105 km/h. Is the GPS correct or is the overhead sign correct?
    Answered by CarsGuide
    4 April 2011
    Carsguide.com.au

    It’s impossible to say, but I would err towards the GPS. It’s most unusual for a speedo to read higher than the real speed, it’s usually the other way around. I would crosscheck the GPS on another car.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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