What are the differences between a Passat TDi 90 and TDi 110 and is it easy to convert a 90 into a 110 ? Any info gratefully recieved.
Same block but injectors are bigger on the 110. I think the later 90bhp got the variable nozzle turbos same as 110bhp. ECUs are different aswell. Quite easy to convert 90 to 110 , but it depends on what turbo it has.