What is the difference between Audi models A3 and A4?

I am interested in purchasing an Audi but I'm confused about the difference between their A3 and A4 models. Can someone please clarify?

The main differences between Audi A3 and A4 lie in their size and performance. The A3 is a smaller and more economical option, while the A4 offers a larger and more powerful driving experience.

In terms of features, the Audi A3 offers more advanced technology and a sleeker design compared to the A4. Consider your personal preferences and budget when making your decision.

If you prioritize a spacious interior and a refined driving experience, go for the A4. However, if you want a compact and sporty option, the A3 might be the better choice for you.