[Ian Robinson]

Does the car have the proper rims and tyres on it - wrong wheels and tyres may have fitted for some reason by the dealership in which case the speedo may well be inaccurate.

I'd recheck on the open road somewhere , pick a stretch of road where you do 10km uninterrupted , and time it at 100km.

If it's still wrong - I'd be straight back the dealership and expecting the speedo recalibrated immediately .

My nephew who was a highway patrol cop on the Pacific Hw (Forster) told me once they allow up to 10% over the speed limit before booking normally unless they are having a blitz where they allow no such allowance (but it's discretionary) , this is because it is easy to find yourself doing 110kmph on those downhill and long straight stretches , and most your purpetrators do a long faster than 110kmph (not unusual to clock people driving at 160-180kmph) on the good stretches.