How does the Audi A7 compare to other luxury car models in terms of fuel efficiency?

I am trying to decide between the Audi A7, Mercedes-Benz CLS, and BMW 6 Series. I know that luxury cars are not typically known for being fuel efficient, but I am looking for the best option in terms of fuel efficiency.

In terms of fuel efficiency, the Audi A7 stands out among its competitors. It has an EPA-estimated 22 mpg in the city and 29 mpg on the highway. This is significantly better than the Mercedes-Benz CLS and BMW 6 Series, which have EPA-estimated 18 mpg and 23 mpg respectively in the city.

As someone who has owned all three of these luxury cars, I can confidently say that the Audi A7 is the most fuel efficient. Even when I pushed the cars to their limits, the A7 still had better overall fuel efficiency.

I have done extensive research on luxury cars and found that the Audi A7 has the best fuel efficiency compared to other models in its class. It uses a efficient 3.0-liter V6 engine, which is more environmentally friendly and helps with fuel economy.