i've read before this about e34 engine converting from 2.0 to 2.5 and it says that the converting to 2.5 wouldn't effect the roadtax of the car..means that the road tax remain the same as 2.0?is it true?and if that true, it for which engine?M20B20 to M20B25? or M20B20 to M50B25?ho about M20B20 to M50B20?the road tax will still remain the same rite?need info here:wink: