Why does my Audi 80 engine rev at higher RPMs while idling?

Recently, I've noticed that my Audi 80 engine seems to rev at higher RPMs while idling. It's not too drastic, but I can definitely hear and feel it. What could be causing this and is it something I should be concerned about?

It's possible that your Audi 80's idle control valve may be malfunctioning. This can cause the engine to rev higher than usual while idling. I would recommend having it checked and possibly replaced.