Why does the Audi A2 have a significantly lower drag coefficient than other models?

I've noticed that the Audi A2 has a drag coefficient of only 0.25, while most other models have 0.30 or higher. What design choices contribute to this lower drag coefficient and how does it affect the overall performance of the car?

The Audi A2's streamlined shape is the main reason for its low drag coefficient. This means that it is able to cut through the air with less resistance, resulting in improved fuel efficiency. Additionally, the car's narrow tires and underbody panels also play a role in reducing drag.

The use of lightweight materials such as aluminum in the construction of the Audi A2 also contribute to its low drag coefficient. This not only decreases the overall weight of the car, but also allows for better aerodynamics.

One advantage of the Audi A2's low drag coefficient is the reduced wind noise during high speeds, making for a quieter and more comfortable ride. It also allows for better handling and stability, particularly in adverse weather conditions.