Why is my Audi 80 vibrating at high speeds?

I recently bought an Audi 80 and I've noticed that it starts to vibrate when I reach high speeds on the highway. It's quite concerning as I've never experienced this with my previous cars. What could be the possible cause for this and what steps should I take to fix it?

It's possible that your tires are unbalanced. This is a common issue that can cause vibrations at high speeds. I would recommend taking your car to a trusted mechanic to have the tires balanced.