How does the Audi A5 utilize its fuel efficiency?

I am curious about the Audi A5 and what makes it stand out in terms of fuel efficiency compared to other cars in the same category. Can you provide some technical details and specifics on the car's fuel efficiency?

The Audi A5 is equipped with a 2.0-liter turbocharged four-cylinder engine that delivers impressive fuel efficiency, with an EPA-estimated 27 mpg in the city and 36 mpg on the highway.

The A5 also utilizes a start-stop system, where the engine shuts off when the car is at a complete stop, such as in traffic or at a red light. This helps to save fuel and increase efficiency.

In addition, the A5 features Audi's progressive steering system, which adjusts the steering ratio based on the car's speed, providing a responsive and efficient driving experience.