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

I recently bought a used Audi 80 and noticed that the engine makes a strange knocking noise when I accelerate. What could be causing this and should I be worried?

It's possible that your engine is experiencing a misfire, which could be caused by spark plugs or ignition coils that need to be replaced. I would recommend taking your car to a mechanic to diagnose and fix the issue.

Another possible issue could be that your engine oil is low or dirty, which can cause knocking noises. Check your oil level and schedule an oil change if necessary.