club.liberty.asn.au

After borrowing my brothers sat nav (Mio 268) for a trip to Canberra I noticed the sat nav speed was approx 8% more than the cars. How are other sat nav speeds compared to cars speeds?

Interesting. The sat nav is usually more accurate, and has always indicated less for me, because most cars are calibrated to read a few % high.
Do you have stock wheels and tyres, or have you changed the size?

my sat nav reads a lower reading than the car and i have stock wheels etc etc....the car dash read 120+ the sat nav reads 110...i know my MY05 rexy was pretty spot on but the liberty seems to be a bit outta wack

I've got the TomTom 910 and the speedo is slower for sure.

G

Destinator for me reads slower than the speedo, so do all those radar checks on the freeways (not that I trust them).

Don't forget there is a slight delay in gps, best to throw in cruise control then measure it.
Speedo should read slightly more than GPS.

Yep still running the stock wheels and tyres. Tested at a couple of different speeds using the cruise control, the speedo was less than the sat nav.

when my car shows 120 i am doing 110 on my gps

Well I got a Tom Tom Go 910 casue me and franky are fully sick.. and were are [ Team Tom Tom ] haha jokes

But yeah.. my tom tom sat seems to be pretty right to the speeds that I do...

FUUUUUUUUUULLY

In a recent review of the GT Spec B in one of the car magazines the speedo indicated 93 km/h at 100 km/h.