How efficient is the Audi A7's engine at different speeds?

I'm considering purchasing an Audi A7 and I'm wondering how its engine performs at varying speeds, especially in terms of fuel efficiency. Can someone provide some insights?

According to Audi's official specifications, the A7's engine has an average fuel efficiency of 22 miles per gallon on city roads and 29 miles per gallon on highways. However, actual performance may vary depending on driving habits and road conditions.

Some independent tests have shown that the Audi A7's engine performs particularly well at highway speeds, where it can achieve upwards of 30 miles per gallon. My advice would be to prioritize highway driving if you're concerned about fuel efficiency.