Why does my Audi 80's engine make a rattling noise at high speeds?

I recently noticed that when driving my 1995 Audi 80 at high speeds, the engine starts to make a loud rattling noise. It seems to be coming from the front of the car. I regularly maintain my car, so I am not sure what the issue could be.

It is likely that there is an issue with your engine mounts. Over time, these can wear down and cause the engine to rattle at high speeds. I would recommend taking your car to a mechanic to have them inspect and potentially replace the mounts.

Another possibility could be a loose or damaged exhaust pipe. This can also cause a rattling noise in the engine. Have a mechanic check for any loose or damaged parts in the exhaust system.

If your car has a turbocharger, it is possible that the wastegate flap is loose or damaged. This can cause a rattle at high speeds. I would suggest having a mechanic inspect the wastegate and possibly replace it if necessary.