it's illegal to be over inaccurately, but it can be under by about 10% depending on the manufacturer, agree with Type R Positive verify with GPS !
Up until about 2006, speedometers could be + or - 10% accuracy. Since then they have to show a speed not more than 10% higher than the actual speed. This is in one of the Federal Australian Design Rules (ADR's). Unfortunately, the States (being separate sovereign entities) are not obliged to take into account permitted speedometer accuracy and so cars built before 2006 run the risk that the speed showing on the speedo is less than the actual speed. The States are not obliged to allow motorists any margin of error for the speedometer. Some police forces do allow it and some don't. By reputation (the public is not privy to actual police policy), most of the eastern states don't.
This then opens the question of why don't the politicians make laws allowing for speedometer error. Usually it's because 99% of politicians are non-car persons that take the advice given by road-safety authorities without question. You might all be surprised to learn that the various state treasuries have a hand as well.
The Commonweath Grants Commission takes into account the average of fines raised per head of population (which it classes as revenue) in each state (and territory) and then penalises grants to states and territories that don't meet the average. This adds pressure to politicians to keep the money rolling in.
This information was once available on the Commonweath Grants Commission website but since 2007, the states have asked the commission not to make the information known publically.
My CL9 is from 2004 and has standard diameter tyres. The speedo reads about 5% faster than the actual speed.
SPQR The first ever Whiteline RSB pattern for CL9 Euro. The world first ever after market RSB for RE4 CRV.
Up until about 2006, speedometers could be + or - 10% accuracy. Since then they have to show a speed not more than 10% higher than the actual speed. This is in one of the Federal Australian Design Rules (ADR's). Unfortunately, the States (being separate sovereign entities) are not obliged to take into account permitted speedometer accuracy and so cars built before 2006 run the risk that the speed showing on the speedo is less than the actual speed. The States are not obliged to allow motorists any margin of error for the speedometer. Some police forces do allow it and some don't. By reputation (the public is not privy to actual police policy), most of the eastern states don't.
This then opens the question of why don't the politicians make laws allowing for speedometer error. Usually it's because 99% of politicians are non-car persons that take the advice given by road-safety authorities without question. You might all be surprised to learn that the various state treasuries have a hand as well.
The Commonweath Grants Commission takes into account the average of fines raised per head of population (which it classes as revenue) in each state (and territory) and then penalises grants to states and territories that don't meet the average. This adds pressure to politicians to keep the money rolling in.
This information was once available on the Commonweath Grants Commission website but since 2007, the states have asked the commission not to make the information known publically.
My CL9 is from 2004 and has standard diameter tyres. The speedo reads about 5% faster than the actual speed.
all they care about is money .. and we still get shit roads ,.........
WTB: NSW CL9 facelift front bumper in Graphite / Grey
Originally Posted by Asho
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