differnce between automatic and standard engines on 2001 Audi A4 Quattro

Is there a difference between an automatic engine or a manual engine? Will a manual engine work on a automatic engine?

Asked by for the 2001 Audi A4 Quattro
You do mean automatic transmission & manual transmission. If your question is will an engine that had a automatic transmission fit a manual transmission. Yes, you will have to buy a flywheel that works with a manual transmission.