What is the difference between the Audi A3 and the Audi A4?

I'm considering purchasing a luxury sedan and am torn between the Audi A3 and the Audi A4. Can someone explain the main differences between these two models and give a recommendation for which one might be a better fit?

The main difference between the Audi A3 and the Audi A4 is their size and price point. The A3 is a smaller, more affordable option while the A4 offers more interior space and features for a higher price. In my experience, if you want a sportier, compact option, go for the A3. If you want a more spacious and luxurious vehicle, the A4 is the way to go.

Another major difference between the Audi A3 and A4 is their engine options. The A3 offers a 2.0L turbocharged engine, while the A4 offers a 2.0L turbocharged engine as well as a more powerful 3.0L engine option. If you're looking for more power and performance, the A4's 3.0L engine may be worth the extra cost.