digital speedo or odometer which one to trust...

[domtas]

hi guys,

im getting two different speed readings from the devices in the car that read speed
1 - digital speed reader (speed alert)
2- in the dash speedo
i got vs commodore v8 manual with stock 15inch wheels with 205/65/15 tyres

i get 100km/h on dash speedo sitting on 2000rpm but on the digital speedo it says 92-93km/h.

which one would u believe is most accurate?

[88GreenVN]

I would tend to trust the digital one.

[moff_man]

try a gps and see which one is closest