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Old 20.11.2020, 19:17
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Re: Driving too slow in a 50 km/h zone

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I think this is a bit outdated based on the older inaccurate spinning magnet speedos.

The modern digital ones are much more accurate - the last two cars I've had were spot on compared to a GPS measurement.
You're the exception(s) then, not the rule. Manufacturers still specifically build-in an overread to ensure the don't overread once the tyres are worn. One of our cars can show via a diagnostic setting the actual speed it's getting from the sensors, which is indeed around 7% lower than the speedo, i.e. they've digitally added the extra. Another one can show a digital readout on the dash, which is also around 7% higher than real (on the standard tyres, the summer set, which were an OEM option, get it spot on).
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