What is the difference between Audi 80 and Audi A4?

I am confused between Audi 80 and Audi A4. Can someone explain the main differences between these two models?

The Audi 80 and Audi A4 are both midsize luxury sedans. However, the Audi A4 is the newer model and has more advanced features and technology than the Audi 80.

One major difference between the Audi 80 and Audi A4 is the engine size and power. The Audi A4 has a larger and more powerful engine, making it better suited for performance and handling.

The exterior design of the Audi 80 and Audi A4 also differ. The Audi A4 has a more modern and sleek look, while the Audi 80 has a more classic and traditional design.