What is the most common issue with Audi 80's engine?

I have been noticing some strange noises coming from my Audi 80's engine. It also feels like the engine is underperforming. What could be the issue?

It is possible that the timing belt of your Audi 80 has worn out or slipped out of its position. It's important to have it checked and replaced if necessary.

In some cases, the issue could be related to the fuel injectors. They could be clogged or malfunctioning, leading to poor engine performance. Try cleaning or replacing them.