Why does my Audi 80's engine make a loud noise?

I've noticed that my Audi 80's engine has been making a loud noise lately. It's a strange noise that I've never heard before. What could be the possible causes of this and how can I fix it?

The most common cause of a loud noise coming from your Audi 80's engine is a problem with the exhaust system. It could be a damaged muffler or a hole in the exhaust pipe. It's best to take your car to a mechanic to have it checked and repaired.

Another possible cause of the noise could be a problem with the engine's timing belt. If the belt is worn or damaged, it can create a loud noise when the engine is running. It's important to have the timing belt replaced regularly to avoid any damage to the engine.