Shake down cruise - 5 mph over ?

[JFP in PA]

Originally Posted by chubert

Not that way across the board. My Touareg is spot on while it seems typical of 986 cars to read 4MPH high. My old Expedition was 2MPH high.

Point is that most are set high, never low.

[PR61]

My 2001 S reads 3.5 higher than true speed. Checked with GPS.

Perry

[mfm22]

Interesting another Boxster "secret"?

I should forget about this and take the speedo at face value - probably save my a$$ from some tickets

[BirdDog]

Mine always indicates 4 mph over (at least above 35 mph, not sure below that).

Confirmed via GPS, Radar, and a friend in Law Enforcement who paced me.

[Dave S.]

My portable GPS will tell you your actual speed. Mine speedometer reads about 2 mph faster at 60 mph than you are actually going.

[Dave S.]

double post. oops.

[lkchris]

Originally Posted by JFP in PA

Point is that most are set high, never low.

As a matter of fact it's by German law.

Among other things, not every brand tire marked the same size is actually the same size. The point is it's considered a safety issue should a speedo indicate less than actual speed.

In the BMW motorcycle world, we've seen a couple tech bulletins about "speedometer advance." They claim the odometer is accurate and there's obviously no mechanical reason why not.

[fanguy]

My Garmin for Car reads 3 over, Garmin handheld Nav for sailing is almost spot on