The 2020 Audi S5 Cabriolet has an EPA fuel economy rating of 22 MPG combined, a figure that may not be the primary concern for its target buyer. This isn’t a family crossover designed to save fuel. It’s a stylish, open-air performance machine delivering exhilarating acceleration and a luxurious driving experience. The fuel economy is simply part of owning it, a compromise for the thrill of the turbocharged V6.

City and highway performance

The EPA further breaks down the S5 Cabriolet’s fuel efficiency, stating 19 MPG in the city and 26 MPG on the highway. These figures reflect the car’s power. The city MPG reflects stop-and-go driving, where the engine works to accelerate the convertible. On the highway, the S5 Cabriolet cruises more efficiently by using its eight-speed automatic transmission to keep the engine in its optimal rev range. However, using the car’s passing power will impact highway MPG for most drivers.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2020 Audi S5 Cabriolet is $2,650. This is based on driving 15,000 miles per year and using national average fuel prices. It’s a useful benchmark, but individual driving habits and fuel prices will impact your actual spending. Drivers with a heavier foot or who spend more time in congested city traffic will likely exceed this estimate. Those who prioritize fuel efficiency and primarily use the vehicle for longer highway trips might spend less.

Real-world expectations

The EPA’s numbers offer a baseline, but real-world fuel economy can vary. Drivers on online forums often cite figures above and below the EPA estimates. Driving style influences this variance. Using the S5’s powertrain frequently to exploit its capabilities will reduce fuel economy. Hard acceleration or aggressive braking will also negatively impact efficiency. The S5 is a performance car, and it rewards an aggressive driving style, but that comes at a cost.

How it compares

The S5 Cabriolet’s fuel economy is in the expected range for its class. For example, the BMW 440i Convertible, another German performance competitor, achieves a similar 22 MPG combined. The Mercedes-Benz C43 AMG Cabriolet comes in slightly lower, often hovering around 20 MPG combined, reflecting its more potent engine and performance. Buyers in this segment typically prioritize driving experience over ultimate fuel efficiency but are aware of the running costs involved. They might cross-shop within the segment, considering factors like styling, features, and performance characteristics, with fuel economy playing a secondary role. You can compare S5 MPG across all years to understand its relative efficiency.

Tips to maximize efficiency

While the S5 Cabriolet isn’t primarily designed for fuel efficiency, a few strategies can help you get the most out of a tank of gas. The most important factor is consistent, gentle acceleration. Avoiding hard starts and stops will reduce fuel consumption, especially in city driving. Anticipate traffic flow and maintain a steady speed whenever possible.

Use the S5’s drive select modes. Selecting “Comfort” or “Efficiency” mode will alter the engine mapping and transmission shift points to prioritize fuel economy. These modes may reduce throttle response but can improve MPG, particularly during longer highway drives.

Regular maintenance is critical for optimal fuel economy. Ensure that your tires are properly inflated to the recommended pressure, as underinflated tires increase rolling resistance and reduce MPG. Also, keep up with scheduled maintenance, including oil changes and air filter replacements, to keep the engine running smoothly.

Reduce unnecessary weight in the vehicle. Removing heavy items from the trunk or rear seats will reduce the amount of energy required to accelerate the car. This helps in maximizing fuel efficiency, particularly in city driving.

The S5 Cabriolet requires premium fuel. Using regular gasoline to save money at the pump can negatively impact engine performance and fuel economy. The engine is designed to operate optimally with premium fuel, and using a lower octane rating can lead to reduced power and increased fuel consumption. Explore all Audi fuel economy data to see how the S5 ranks within the brand.