Im new to the Audi scene and this seems like a topic that has probably been posted about before but I didn't see anything specific when I did a search. I have a 2000 Audi TT (not quattro) that needs an engine replacement (also considering a rebuild after extent of damage is known). I've seen topics about the VW 1.8T engine from cars such as the Jetta being the same but how compatible are they with the TT? Is the 1.8T the same from a Quattro?

If anyone can point me in the right direction it would be greatly appreciated!