I’ll get that OBD thing sorted later and download an app, I think it’s defo wrong!
When driving to work this morn I found approx 1300 at 30 in 4th, and accelerating in 4th from that speed felt too smooth to be at those revs, felt like higher revs and turbo spooling straightaway. 70 in 5th was showing just below 2500.
Now, next question. Where does your needle sit when the engine is off? I had clocks out, my 11 yr old child had a look at them, remarked how the needles wobbled around when you turned it over. As I had the cover off it isn’t beyond the realm of possibility that a finger may have prodded at the needle… So here’s a pic of where my needle sits at rest. What does yours do?
View attachment 432594
Notice the speedo needle rests at 0, the rpm needle drops below that. So it may just potentially be the needle has been moved on the shaft of the potentiometer.