Quote:
SVNSVN said:
Yeah, that seems right. When passing those speed signs- it indicates about 3-4 mph over the posted speed.



Oddly, when I pass those speed signs in my 06 Club Coupe, the speedo is identical to the posted speed--first one out of the 6 different Porsches I've owned that didn't have a speedo that read 3-4 mph over actual speed. My Audi A6 is off by about 2 mph, btw.

Perhaps Porsche took extra special care to get the X51's calibrated closely? (Not true, I know; I've read/heard others who have said unlike earlier models, their 997's are very close to "dead balls on accurate").