What could be causing my Audi 80 to shake while driving?

I've noticed that my Audi 80 shakes while I'm driving at high speeds. What could be causing this and how can I fix it?

It's most likely an issue with your tires. Check for any uneven wear and make sure they are properly inflated.

Another possibility is a problem with your suspension or alignment. Have a mechanic take a look to diagnose and fix the issue.

Make sure to also check your spark plugs and ignition system. A faulty spark plug can cause shaking in your car.