Speedo Inaccurate

[Brian]

Interesting stuff. My TSi MFD is the same as the analogue gauge, which is 6% slower than the GPS (and Ive tested 2 GPSs against it)
The odometer is spot on when tested against the 5KM test "tracks" on the highway
Keeps the brain active calculating 6% error and driving to that. OR - believe the GPS. OR - just don't speed

[Corey_R]

Yeah Brian, my MFD speedo and analog speedo are identical too. But I know a lot of people here have mentioned that their's are not. I think that it may have been changed to be identical at MY09 or something like that as it used to be a common thing newbies would post about...

[Steveo]

Ditto for me - analogue and digital speedo are the same - although the digital sometimes lags the needle by a couple of seconds.

At an indicated 110kmh the GPS says I am doing 104kmh... so the speedo is reading 6kmh high at that speed - but around 80kmh is only 4 or 5 out, so it seems to work on a percentage. I've been through speed traps at an indicated 121kmh (actual 115kmh) and the police were not interested.

The odometer is accurate when measured against the 5km marks on the highway.

[Corey_R]

Yep, it's definitely a percentage. That's why we recommend 100km/h so that it's obvious what that % is. You could do it at any speed of course, but harder to work out in your head

[AdamD]

I wouldn't be surprised if it's a fixed margin plus a percentage, to be honest. My observations suggest that's the case with my car.

[MkVIGTI]

Just tried the average speed trick and found out that my GTI is about 6% out