S2 Speedo Error

[T' Veteran Racer]

The Speedometer in my S2 under reads by 3-4mph at 70mph, when checked against my sat nav. Is this something that all TVR S's do or is it possible to correct?

I have the standard 15" wheels with 205/60 Tyres fitted.

Edited by T' Veteran Racer on Thursday 19th May 15:50

Edited by T' Veteran Racer on Thursday 19th May 20:33

[2 sMoKiN bArReLs]

T' Veteran Racer said:

The Speedometer in my S2 under reads by 3-4mph at 70mph. Is this something that all TVR S's do or is it possible to correct?

Wow, that's accurate!!!

All my TVRs have been way off

[frontfloater]

I assume you're checking this by using GPS on a flat road? Not by comparison with another vehicle, which could be equally inaccurate.

UK law says that vehicle speedos can OVER-read by up to 10% , but must not under-read by even a fraction. To avoid breaking the latter rule, many manufacturers build in a slight over-reading error. That's why you find so many modern cars cruising on the motorway at 67 - 68 MPH ; their speedos are showing 70.