How does the lightweight design of the Audi A2 contribute to its fuel efficiency?

I am looking to purchase an Audi A2 and have heard that its lightweight design plays a significant role in its fuel efficiency. Can someone provide further details on how this design feature impacts the car's fuel consumption?

The Audi A2's lightweight design is achieved through the use of aluminum and composite materials, resulting in a lower overall weight and improved efficiency. Additionally, the car's aerodynamic shape also contributes to its fuel economy.

I have personally owned an Audi A2 for several years and can attest to its exceptional fuel efficiency. The lightweight design allows the car to accelerate and maintain speed with less effort, resulting in improved fuel consumption.