Why does my Audi 80's engine make a rattling noise when accelerating?

I've noticed that my Audi 80 makes a loud rattling noise when I accelerate. It seems to be coming from the engine. Can anyone explain what could be causing this and how I can fix it?

It sounds like your engine may be experiencing a timing chain issue. It's important to get this checked out by a professional mechanic as soon as possible, as a faulty timing chain can cause serious damage to your engine.