quattro digest, Vol 1 #3224 - fastest drive, etc

[Larry C Leung]

Matt at theonlymattman007 at yahoo.com

To prevent you from accidentally speeding?

and


On Sat, 6 Apr 2002 16:16:54 +0200 "Phil Payne"
<quattro at isham-research.com> writes:
> > BTW - Odometers of all, as a rule, were MUCH more accurate.
> >
> > Any guesses why? (and yes, there is an answer)
>
> Construction and Use Regulations in the UK require speedometer
> accuracy of -0%/+10% - they may
> read high, but never low.  To allow for inevitable tolerances,
> they're all designed to read
> slightly high.
>
> --
>   Phil Payne
>   http://www.isham-research.com/quattro
>   +44 7785 302 803
>   +49 173 6242039
>
>
>
The winner is ......







BOTH, though Phil's is a "little" more precise.

The article was in the April 2002 Car and Driver which states that TUV
regulations (which appear to match the UK regulations, is it possible
it's part of EU regs?) allow the speedos to read high, and the apparent
reason is that mostly (per the article) German drivers will change their
wheel tire combos and thus accompensation is to be "built-in". I am
assuming regulators are most concerned about snow tires, which tend to
even when proper minus sizing is applied, have larger rolling diameters
than their corresponding summer tires.

LL - NY