how many kmh are allowed with a tach o ? so if I drive zb 100 kmh, to how much can he display ? that the tacho can never show less as he really drives is clear to me, but how much can he show too much ??? me these opel tachos always seem so extremely wrong, workmate drives in the city allegedly always 100 (I have seen), but that never worked out, because the one complete collapse was on a large road. I would say that was at most 70… he best Is it true that his tacho is right and he pulls up to 50 kmh in the 1 course without the motor crying (maximum 3500 turns) he told me but once that he had to do a tachotest because of other matures, where he fell through with 5 kmh, which I could then get out then how fast he really is so how much can the tacho normally show maximum too much ?