24 MPG combined won’t win any awards for using less gas, but that’s hardly the point of the 2016 Audi A5 Cabriolet quattro 2.0L. This isn’t a car for hypermilers; it’s a stylish, comfortable, and genuinely fun-to-drive convertible designed for those who prioritize open-air enjoyment and a touch of luxury over saving on gas. Its owners accept the mileage because they understand the trade-offs: all-weather traction thanks to quattro all-wheel drive, a strong turbocharged engine, and the appeal of a drop-top Audi. This A5 speaks to a very specific buyer, one whose lifestyle demands a certain level of capability.

City and highway performance

The EPA estimates for city and highway driving reflect the A5 Cabriolet’s dual nature. The 21 MPG city rating is respectable for a car in this class with all-wheel drive, acknowledging the stop-and-go conditions where the engine works harder and the automatic transmission does more shifting. On the open road, however, the 29 MPG highway figure demonstrates the efficiency attainable when the engine settles into its sweet spot and the S tronic dual-clutch transmission can cruise in higher gears. The 2.0L engine’s broad torque curve means less downshifting and a relaxed driving experience, contributing to better fuel mileage on longer journeys.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,400 for the 2016 Audi A5 Cabriolet quattro 2.0L. This figure is based on driving 15,000 miles per year, using a blend of 55% city and 45% highway driving, and assumes national averages for fuel prices. Keep in mind that your actual fuel costs may be higher or lower depending on your driving habits, the type of fuel you use (premium is recommended), and local fuel prices. If you frequently find yourself stuck in rush-hour traffic or have a lead foot, expect to spend more.

However, if you do a lot of highway driving and practice fuel-efficient techniques, you may be able to beat the EPA estimate.

Real-world expectations

While EPA estimates provide a useful baseline, real-world fuel economy often varies. Some A5 owners report figures that are close to the EPA numbers, but some see slightly lower numbers, especially when driving primarily in the city. Aggressive acceleration and frequent use of the sportier “S” mode on the transmission will also negatively impact fuel economy. Conversely, conscientious drivers using the “Efficiency” mode and anticipating traffic flow can often achieve numbers slightly above the EPA highway estimate on long trips. The A5’s trip computer provides real-time and average fuel economy data, helping drivers monitor their consumption and adjust their driving habits accordingly.

How it compares

Compared to other convertibles in its class, the 2016 A5 occupies a middle ground when it comes to fuel economy. The BMW 428i Convertible (RWD) achieves a slightly better 27 MPG combined. However, adding xDrive (all-wheel drive) to the BMW drops the figure closer to the A5’s. The Mercedes-Benz C300 Cabriolet sits in a similar ballpark. A key consideration for the A5 buyer is the standard quattro all-wheel drive, which adds weight and complexity, directly impacting fuel economy, but provides superior traction in inclement weather. For many, that’s a reasonable compromise. You simply can’t find all Audi fuel economy data without acknowledging the quattro effect.

Tips to maximize efficiency

Use the Audi Drive Select system. The “Efficiency” mode optimizes engine and transmission settings for improved fuel economy, often noticeably reducing throttle response. It encourages a smoother driving style and prevents unnecessarily aggressive acceleration, which can significantly improve your MPG.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and burning more fuel. Check your tire pressure regularly and inflate them to the recommended level (typically found on a sticker inside the driver’s side door jamb). Even a small increase in tire pressure can make a difference over time.

Avoid unnecessary idling. If you’re stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and efficiently, and idling wastes fuel and emits unnecessary pollutants. The A5’s start/stop system can help with this in city driving.

Drive smoothly and anticipate traffic flow. Avoid sudden acceleration and braking, which consume more fuel. Maintain a steady speed and try to anticipate changes in traffic conditions so you can slow down gradually rather than slamming on the brakes. Use cruise control on the highway to maintain a consistent speed. Researching A5 MPG across all years reveals consistent gains from smooth driving.

Minimize aerodynamic drag. Remove any roof racks or cargo carriers when not in use, as they increase wind resistance and reduce fuel economy. Consider retracting the soft top when appropriate and weather permits to enjoy the open air, as this doesn’t noticeably impact fuel economy at reasonable speeds.