How to prevent engine knocking in an Audi 80?

I have noticed that my Audi 80 engine has started knocking recently. What could be causing this and how can I prevent it?

Engine knocking can be caused by a variety of factors, such as low octane fuel, incorrect spark timing, or worn out spark plugs. My suggestion would be to first check your fuel type and make sure you are using the recommended octane level for your car. If that doesn't solve the issue, you may want to check your spark plugs and make sure they are in good condition. If all else fails, it might be worth taking your car to a mechanic for a thorough inspection.