The fuel efficiency of the Audi Q7 varies depending on the engine option and driving conditions. The 2.0-liter engine is the most fuel-efficient, with an EPA-estimated fuel economy of 19 mpg in the city and 23 mpg on the highway. The 3.0-liter engine has an EPA-estimated fuel economy of 17 mpg in the city and 21 mpg on the highway. The 4.0-liter engine has an EPA-estimated fuel economy of 15 mpg in the city and 21 mpg on the highway.















