While a combined 27 MPG isn’t the *main* reason someone buys a 2018 Audi A5 Cabriolet quattro 2.0L 4-cyl, it’s a respectable figure for a stylish, all-weather convertible that prioritizes spirited driving. This isn’t a fuel-sipping hybrid; it’s a luxury lifestyle choice, and the fuel economy reflects the balance between performance and relative efficiency. The target customer prioritizes the driving experience and open-air enjoyment over squeezing every last mile from a gallon of premium gasoline, but they also aren’t oblivious to fuel costs.

City and highway performance

The EPA estimates the A5 Cabriolet at 24 MPG in the city and 34 MPG on the highway. The city figure better reflects the stop-and-go driving that many owners will experience, especially during commutes and weekend errands. The highway number is where the A5 Cabriolet excels. The 2.0L turbocharged engine, paired with the seven-speed automatic transmission, allows for relaxed cruising and efficient long-distance travel.

Expect to see these numbers hold relatively true if you spend most of your time on the open road, but aggressive driving will quickly reduce your observed fuel economy.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2018 Audi A5 Cabriolet quattro 2.0L 4-cyl is $2,150. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of testing. Keep in mind that this is just an estimate, and your actual fuel costs will vary depending on your driving habits, location, and the fluctuating price of gasoline. However, it provides a useful benchmark for comparing the A5 Cabriolet’s fuel costs to other vehicles in its class. You can also compare to the entire range of all Audi fuel economy data.

Real-world expectations

While the EPA estimates are a good starting point, real-world fuel economy often differs. Expect to see numbers slightly below the EPA estimates if you frequently engage in spirited driving or spend a significant amount of time in heavy traffic. However, if you drive conservatively and prioritize fuel efficiency, you may be able to achieve mileage closer to, or even slightly above, the EPA’s figures. Factors such as tire pressure, vehicle maintenance, and even weather conditions can also impact fuel economy.

How it compares

The A5 Cabriolet’s fuel economy places it competitively within the luxury convertible segment. For instance, the BMW 430i Convertible, another popular choice, achieves around 28 MPG combined. The Mercedes-Benz C300 Cabriolet posts similar figures, hovering around 27 MPG combined. While slight variations exist, the A5 sits in a sweet spot that balances performance and fuel consumption without major compromises. These are competitors that a shopper might consider, and while one or two might boast a mile or two advantage in certain testing scenarios, the overall ownership experience trumps minuscule differences at the pump. Explore A5 MPG across all years to see how this compares to older models and other trim levels.

Tips to maximize efficiency

Pay attention to tire pressures. Maintaining the correct tire inflation, as specified on the sticker inside the driver’s side door, can significantly improve fuel economy. Underinflated tires create more rolling resistance, which forces the engine to work harder.

Avoid aggressive acceleration and braking. Smooth and gradual acceleration and deceleration conserve fuel. Anticipate traffic flow and avoid sudden stops whenever possible. The A5 Cabriolet’s quattro all-wheel drive system provides excellent grip, but it doesn’t negate the laws of physics when it comes to fuel consumption.

Use cruise control on the highway. Maintaining a constant speed on the highway is more fuel-efficient than constantly varying your speed. The A5 Cabriolet’s adaptive cruise control ensures a set following distance, enhancing safety and saving gas.

Limit idling. Excessive idling wastes fuel. If you’re stopped for more than a minute, consider turning off the engine, especially in urban environments. The auto start/stop feature is included to save you more, though comfort will suffer for some drivers.

Consider the A5 Cabriolet’s fuel needs during your shopping trips. The vehicle requires premium fuel. While it might be tempting to cheap out and pump regular unleaded, this will reduce performance and fuel efficiency over the long run.