What are the differences between the Audi 80 and 90?

I am interested in purchasing an older Audi model, but I can't seem to understand the differences between the 80 and 90. Can anyone provide some insight?

The Audi 80 and 90 are essentially the same vehicle, with minor differences in trim level and engine options. The 90 generally had more features and a slightly more powerful engine than the 80.

One of the main differences between the Audi 80 and 90 is the exterior styling. The 90 had more angular and modern design elements, while the 80 had a more classic and timeless look.