What causes engine vibrations in the Audi 80?

I have noticed strong vibrations coming from my Audi 80 engine. It only occurs at certain speeds and doesn't always happen. Any idea what could be causing this?

It is likely that your engine is misfiring, causing the vibrations. We recommend getting your spark plugs and ignition coils checked, as they are common causes of engine misfires.

Another possible cause could be worn engine mounts. Look for any visible cracks or damage on the mounts and consider replacing them if necessary.

You may also want to check your fuel system for any clogging or blockages. A dirty fuel filter can also cause engine vibrations.