26 MPG combined isn’t going to win any hypermiling awards, but for the 2020 Audi A5 Cabriolet quattro with its 2.0L turbocharged engine and all-wheel drive, it’s an acceptable trade-off for open-air thrills and confident performance. This isn’t a car bought for its fuel sippability; it’s purchased for its style, its badge, and its ability to transform an ordinary commute into a small adventure with the top down. People who buy this car are likely less concerned with squeezing every last mile out of a gallon and more interested in a luxurious experience, even if it means slightly more frequent trips to the gas station.

City and highway performance

The EPA estimates that the 2020 Audi A5 Cabriolet quattro will achieve 23 MPG in the city and 31 MPG on the highway. The city figure reflects the stop-and-go driving conditions that often plague urban centers, showcasing how the turbocharged engine behaves when frequently accelerating from a standstill. The highway number demonstrates the A5 Cabriolet’s ability to maintain a reasonable fuel economy on longer journeys at consistent speeds. The seven-speed S tronic automatic transmission plays a key role here, optimizing gear selection for both performance and efficiency. These figures are relevant for assessing the A5 Cabriolet’s overall fuel consumption where city MPG drives the overall combined MPG down due to how much people actually drive in urban environments.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2020 Audi A5 Cabriolet quattro will be $2,250. This calculation is based on driving 15,000 miles per year and using national average fuel prices. Although prices can fluctuate depending on location and market conditions, this provides a standardized benchmark for comparing fuel expenses across different vehicles. While $2,250 is a significant amount, remember that you’re paying for the luxury and performance of a German convertible with all-wheel drive. Someone concerned about minimizing fuel costs might be looking in an entirely different segment.

Real-world expectations

While the EPA ratings are a good starting point, real-world fuel economy can vary quite a bit depending on driving habits, traffic conditions, and even weather. A lead foot, excessive idling, and aggressive acceleration will all push the A5 Cabriolet further away from its EPA estimates, especially given the driver might be tempted to drive it hard on twisty backroads. Conversely, conservative driving with an eye on the efficiency gauge can nudge the numbers closer to, or even slightly above, the official figures.

Also, keep in mind that winter driving often reduces fuel economy due to colder temperatures and the use of winter tires, which have higher rolling resistance.

How it compares

Compared to its competitors, the 2020 Audi A5 Cabriolet quattro’s fuel economy lands somewhere in the middle of the pack. The BMW 430i Convertible, for example, also boasts a 2.0L turbocharged engine and automatic transmission. It’s rated at 27 MPG combined, edging out the A5. The Mercedes-Benz C300 Cabriolet, with similar specifications, shows 25 MPG combined, 22 city, and 31 highway. For those really concerned about fuel economy, the Lexus RC 300 RWD achieves 24 MPG combined. While the differences seem small on the surface, they can add up over time. However, the buying decision here often comes down to subjective factors like styling, brand preference, and driving experience, perhaps not even fuel economy. You can also view A5 MPG across all years to view models with higher MPG. Also, consider that all Audi fuel economy data can be found on our website.

Tips to maximize efficiency

Use Audi Drive Select wisely. The A5 Cabriolet features Audi Drive Select, which offers various driving modes, including an “Efficiency” mode. Engaging this mode adjusts engine and transmission settings to prioritize fuel economy over outright performance. It might slightly dull throttle response, but it also encourages a more relaxed and efficient driving style.

Maintain proper tire pressure, and don’t ignore the tire pressure monitoring system. Underinflated tires increase rolling resistance, which directly impacts fuel economy. Regularly check your tire pressure and inflate them to the recommended level, which can be found on a sticker inside the driver’s side doorjamb. Proper inflation also improves handling and tire wear.

Avoid excessive idling. Letting the engine idle for extended periods wastes fuel and contributes to unnecessary emissions. If you anticipate a delay of more than a minute or two, it’s best to turn off the engine. Modern cars don’t require extended warm-up periods, so there’s no need to let it idle before driving.

Anticipate traffic and drive smoothly. Aggressive acceleration and braking consume more fuel than gradual, controlled driving. By anticipating traffic flow and maintaining a steady speed, you can minimize unnecessary acceleration and deceleration. Smooth driving not only saves fuel but also improves the overall driving experience.