How does the Audi A2's fuel-efficient design contribute to its overall performance?

I am interested in the engineering behind the Audi A2's fuel efficiency. How is this aspect of the car's design and technology integrated to enhance its overall performance?

The Audi A2's fuel-efficient design is achieved through its lightweight construction and aerodynamic shape. This not only helps to reduce fuel consumption and emissions, but also improves the car's acceleration and handling.