Why does my Audi 80 engine make a strange clicking noise?

I recently purchased a used Audi 80 and I've noticed that the engine makes a strange clicking noise when I start it. It doesn't seem to affect the performance of the car, but I'm worried it might be a sign of a larger issue. Can anyone offer any insight into what may be causing this noise?

Your Audi 80 may be experiencing a problem with the valve lifters. This could be caused by a lack of proper lubrication or a faulty lifter itself. It's best to have a mechanic inspect the engine to determine the cause of the clicking noise.