What is the most effective way to reduce air resistance in an Audi A1?

I want to improve the aerodynamics of my Audi A1 and reduce air resistance to increase fuel efficiency. What are the best modifications or techniques to achieve this?

One of the most effective ways to reduce air resistance in an Audi A1 is to install a front lip spoiler. This will help redirect the airflow around the car, minimizing drag and improving efficiency. Additionally, keeping the car clean and waxed can also help reduce air resistance.

Upgrading to low rolling resistance tires can greatly reduce air resistance and improve fuel efficiency. These tires are designed to reduce friction with the road, allowing the car to move more easily with less resistance.

Adding a rear wing or spoiler to your Audi A1 can also greatly reduce air resistance. This will help create a downward force on the back of the car, keeping it stable at high speeds and reducing air drag.