Quote:
Originally Posted by dparm
Right, but why is the analog speedo intentionally skewing the speed? Obviously it cannot be 100% accurate all the time, but if it is KNOWN to be wrong, why not correct it? Is it at least consistently inaccurate across the entire range?
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I'm pretty sure that you can code both to show a closer representation to actual speed.
As far as why they are high, I can only speculate for the US. I know European cars have a specific law that states they can never show a speed on the display that is lower than the actual speed. I think it is ECE-R39. (not entirely sure tho) I don't think the US or Canada have any specific laws in terms of what speed they show. Also, the speedo is calibrated for a certain overall wheel/tire size combo. So any variations in size (under/over inflation) or a completely different wheel size can mess with that reading a little.
I would think that automakers, lawmakers and insurance companies would much rather have a person going 60 thinking they are going 75. (Greatly exaggerated, of course.) Less tickets, and less risk of injury and damage to personal property. I guess on the flipside tho one could argue how much does 5 MPH (more realistic difference) actually change in all of that? Except a speeding ticket.
Anything in the opposite direction has no benefit. So I think....