Speedo reading accuracy

[Lemonskin]

When I get my licence I won't speed. Promise

Famous last words

[brad]

also if you are speeding a bit you don't get snapped by the camera

For me, this is akin to those people that set there watch 5 minutes fast so they aren't late for appointments.

If you know your speedo is accurate, you tend not to speed (that's how it works for me). I can't nelieve the amount of times the fast lane is held up by somebody in a VAG group vehicle who is religously sticking to the speed limit (good on them) but their speedo is deceiving them.

[brad]

So hearing that the speedo is linked to the size of the wheels, if I was to get bigger wheels, that would stuff the speedo up would it not? Or is there a setting somewhere to specify your wheels size?

Wheels are the metal bits. Tyres are the rubber bits.

[AC74]

For me, this is akin to those people that set there watch 5 minutes fast so they aren't late for appointments.

If you know your speedo is accurate, you tend not to speed (that's how it works for me). I can't nelieve the amount of times the fast lane is held up by somebody in a VAG group vehicle who is religously sticking to the speed limit (good on them) but their speedo is deceiving them.

Haha! Subarus are just as bad - my MY07 Outback consistently over-reads by ~10% (i.e. speedo says 100, buy you're actually doing 90). So next time you're stuck behind a seemingly dozy Forester, Outback or Liberty remember that!

[wai]

For me, this is akin to those people that set there watch 5 minutes fast so they aren't late for appointments.

If you know your speedo is accurate, you tend not to speed (that's how it works for me). I can't nelieve the amount of times the fast lane is held up by somebody in a VAG group vehicle who is religously sticking to the speed limit (good on them) but their speedo is deceiving them.

Unfortunately it is the litigous world we live in where we look out for someone else to blame. This is why vehicle manufacturers overstate the speed so that they can never be accused of understating the speed.

What amazes me is that with all the electronics and computing power in modern cars that there is not a simple GPS module that is periodically (like say every 10 minutes) re-calibrating the speedometer so that an accurate speed is shown to the driver. Heck, I would give up an electric driver's window (after all, there is always a driver in the car...I hope) and have that invested in something that would give me the true speed.

For the record I have an AlerteGPS and an ANS610 that give me the correct (well more correct than the speedo readout) speed.

[Guest001]

For me, this is akin to those people that set there watch 5 minutes fast so they aren't late for appointments.

If you know your speedo is accurate, you tend not to speed (that's how it works for me). I can't nelieve the amount of times the fast lane is held up by somebody in a VAG group vehicle who is religously sticking to the speed limit (good on them) but their speedo is deceiving them.

The answer to this is that you are probably speeding according to your speedo as almost all cars speedos are manufactured to the same tolerances as a VW.
One exception was my Landcruiser which according to my GPS was dead on at 100kph

[Guest001]

So hearing that the speedo is linked to the size of the wheels, if I was to get bigger wheels, that would stuff the speedo up would it not? Or is there a setting somewhere to specify your wheels size?

Read my reply re tyres You can put any WHEELS (RIMS) you like on as long as the overall tyre diameter doesnt exceed the largest original by more than 15mm or 26mm smaller

You can put bigger diameter rims but then need rubber bands instead of tyres

[brad]

The answer to this is that you are probably speeding according to your speedo as almost all cars speedos are manufactured to the same tolerances as a VW.
One exception was my Landcruiser which according to my GPS was dead on at 100kph

I think earlier that I rattled off an extensive list of the recently manufactured vehicles that we've had live in our garage the last 10 years - none as bad as my VAG product. If I throw into the mix all the pool cars at work, still none as bad as current VAG product. Most are about 3-5kph out at 100kph. My VAG is 8kph. That last 3kph is pretty annoying

[brad]

Haha! Subarus are just as bad - my MY07 Outback consistently over-reads by ~10% (i.e. speedo says 100, buy you're actually doing 90). So next time you're stuck behind a seemingly dozy Forester, Outback or Liberty remember that!

We have an MY12 Outback. It's pretty good. I'm happy with the speedo.

[Candyman]

Speedo reading accuracy

We have an MY12 Outback. It's pretty good. I'm happy with the speedo.

Well that's good to hear, at least the speedo sounds good, pity about the car it is attached to

Have owned quite a few Subies myself - all speedos on them read over by similar amounts (by design)

[Lemonskin]

My old man has a Subie Outback MY10... Nice car, nice interior, nice ride etc... But utterly, utterly gutless!