21 MPG combined is a compromise accepted willingly by those who park a 2017 Audi S7 in their driveway. This isn’t a car bought for its fuel sipping abilities; it’s a statement of performance, luxury, and understated aggression, wrapped in a sleek, coupe-like sedan body. Buyers prioritize the thrill of the 450-horsepower V8 and the quattro all-wheel drive system far above maximizing miles per gallon.

City and highway performance

The 2017 Audi S7’s EPA-estimated fuel economy breaks down to 17 MPG in the city and 27 MPG on the highway. The city figure reflects the S7’s weight and the demands placed on the turbocharged V8 in stop-and-go traffic. The highway MPG is more respectable and achievable during steady-state cruising where the engine isn’t constantly called upon for rapid acceleration. This spread suggests the S7 is more suited for longer commutes or weekend highway jaunts than daily gridlock.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Audi S7 at $2,750. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. It’s a useful benchmark, but keep in mind that actual fuel costs will vary significantly based on individual driving habits, fuel prices in your area, and the grade of gasoline used. Given the S7’s need for premium fuel, expect to pay a premium at the pump.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy for the 2017 Audi S7 often deviates. Drivers with a heavy foot or those frequently enjoying the engine’s performance capabilities will likely see figures closer to the 17 MPG city rating, even on mixed routes. Conversely, careful drivers who prioritize smooth acceleration and use cruise control on the highway might reach or even slightly exceed the 27 MPG highway rating. As with any performance vehicle, driving style is a major determinant of fuel consumption.

How it compares

The S7 sits in a competitive segment where performance and luxury often outweigh fuel efficiency concerns. A comparable BMW 550i xDrive from the same year, boasting a similar V8 engine and all-wheel drive, achieves roughly the same fuel economy: an EPA-estimated 16 MPG city, 25 MPG highway. The Mercedes-AMG E43 Sedan, while offering a slightly more efficient turbocharged V6, still only manages around 18 MPG city and 25 MPG highway. These figures highlight that the S7’s fuel economy is par for the course for a V8-powered luxury performance sedan. For those considering alternatives with a focus on less gas, the Porsche Panamera e-Hybrid offers significantly better mileage in hybrid mode, but at a higher price point and with a different driving experience. Review S7 MPG across all years to see how this model compares to newer offerings.

Tips to maximize efficiency

Use the Audi Drive Select system wisely. The “Efficiency” mode alters throttle response and transmission mapping to prioritize fuel conservation. While it won’t transform the S7 into a hybrid, it can make a noticeable difference during relaxed cruising.

Anticipate traffic flow and avoid aggressive acceleration. The S7’s V8 is incredibly responsive, but each hard acceleration burns extra fuel. Smooth, gradual acceleration not only improves fuel economy but also makes for a more refined driving experience.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which negatively impacts fuel mileage. Check your tire pressure regularly and inflate them to the recommended level found on the doorjamb sticker.

Minimize warm-up idling, especially in colder weather. Modern engines warm up more efficiently while driving. Avoid letting the car idle for extended periods before setting off, unless absolutely necessary.

Consider opting for lighter wheels and tires when it’s time for replacement. Reducing unsprung weight can improve both handling and fuel economy, though the effect is often marginal. Remember to prioritize safety and performance over purely chasing fuel savings. For more insights, consult all Audi fuel economy data.