ECU compatibility

[mauler440]

I have a 92 440t, i know these things are becoming few and far between, my question is that i have a chance to get hold of a modified ECu from a 94 480t, does any one know if it would a straight plug and play.
Thanks
Kevin

 

[obi_waynne]

What modifications have been done to it (and the car)? Is it for the same engine?