18 MPG combined won’t win any awards for lower fuel costs, and Audi knows it. The 2018 S7 4.0L isn’t about sipping fuel; it’s a surgically precise instrument of speed draped in a cloak of luxury. This V8-powered, all-wheel-drive machine is built for effortless cross-country blasts and confident backroad carving. It trades outright efficiency for a driving experience that few sedans can match, and its target demographic understands this tradeoff perfectly.

City and highway performance

The EPA estimates for the 2018 Audi S7 4.0L V8 reveal a dichotomy of performance. In the city, expect around 16 MPG. This reflects the S7’s considerable weight and the inherent thirst of a high-performance V8 when subjected to stop-and-go traffic. On the open highway, the S7’s engine settles into a more relaxed rhythm, delivering up to 24 MPG. This figure highlights the S7’s grand touring capabilities, making long-distance drives surprisingly palatable, considering its performance potential. The seven-speed automatic transmission also plays a role, optimizing gear selection for both rapid acceleration and relaxed cruising. Drivers seeking the best of both worlds will need a delicate touch and an understanding of how to best manage the S7’s power delivery.

Annual fuel cost

Owning a performance machine like the 2018 Audi S7 comes with certain financial realities. The EPA estimates that the annual fuel cost for this car will be $3,200. This figure is calculated based on driving 15,000 miles per year, with a mix of city and highway driving, using national average fuel prices. Naturally, this number can fluctuate based on individual driving habits and changes in fuel prices, but it provides a benchmark for potential owners to consider. It’s a significant investment, but one that S7 buyers typically accept as the price of admission for the performance and luxury this vehicle offers.

Real-world expectations

While the EPA provides a standardized testing environment, real-world fuel economy can vary significantly. The S7’s powerful V8 encourages spirited driving, and a heavy foot will undoubtedly lead to lower MPG figures than the estimates suggest. However, drivers who prioritize smooth acceleration and consistent highway speeds can often get close to, or even slightly exceed, the EPA’s highway rating. Factors such as weather conditions, tire pressure, and vehicle maintenance can also impact fuel efficiency. Diligence in these areas can help owners keep fuel costs in check.

How it compares

The S7 occupies a unique position within the performance sedan market. A car like the BMW M550i xDrive, with its 4.4L V8, delivers a similar blend of performance and luxury, while achieving approximately 19 MPG combined. The Mercedes-AMG E43 sedan, using a smaller turbocharged V6, offers comparable acceleration with slightly better fuel economy around 21 MPG combined. Those seeking superior fuel economy might consider hybrid sedans, but these options often lack the S7’s raw power and visceral driving experience. Comparing S7 MPG across all years shows that this generation reflects the typical fuel consumption for a car in this segment. Ultimately, the S7 buyer prioritizes the Audi’s unique blend of understated styling, all-weather capability, and distinctive engine sound over marginal gains in fuel efficiency. You can explore all Audi fuel economy data to further contextualize the S7’s numbers.

Tips to maximize efficiency

One of the easiest ways to save fuel in the S7 is to resist the urge to constantly exploit its power. Smooth, gradual acceleration is far more efficient than aggressive launches. Treat the throttle with respect, and you’ll see a noticeable improvement in your fuel consumption.

Regular maintenance is also critical. Ensure your tires are properly inflated to the manufacturer’s recommended pressure. Low tire pressure increases rolling resistance, which forces the engine to work harder and consume more fuel. Keeping up with scheduled oil changes and air filter replacements will help the engine run optimally.

Use the S7’s drive select modes. The “Efficiency” mode optimizes various vehicle settings, such as throttle response and transmission mapping, to prioritize fuel conservation. While it might slightly diminish the car’s sporty character, it can make a difference on long highway drives.

Avoid unnecessary idling. If you anticipate being stationary for more than a minute or two, shut off the engine. Idling consumes fuel without covering any distance, so minimizing it can lead to significant savings over time. This is especially relevant in city driving.