The 2018 Audi A3 Cabriolet, with its 2.0L 4-cylinder engine, gets 28 MPG combined. That’s not the most efficient, but it’s a workable balance for those who want open-air driving and a premium experience more than saving every last drop of fuel. This car prioritizes lifestyle. It’s for weekend cruises with the top down, not budget commuting.

City and highway performance

The EPA estimates the A3 Cabriolet gets 25 MPG in the city and 33 MPG on the highway. The city number reflects stop-and-go traffic, which the turbocharged engine and seven-speed automatic transmission handle reasonably well. The highway number is more appealing, suggesting longer trips can be relatively economical, but driving with the top down will decrease your MPG. Considering the 220 horsepower and 258 lb-ft of torque, the highway number is actually quite good. The transmission is tuned to keep engine speeds low at cruising speed, which helps achieve the relatively high highway MPG.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Audi A3 Cabriolet is $1,550. This calculation is based on driving 15,000 miles per year and using national average fuel prices. Individual fuel costs will vary depending on your driving habits, city versus highway driving, and local fuel prices. This figure assumes you’re using premium fuel, which the A3’s engine needs for its advertised performance.

Real-world expectations

EPA estimates are a helpful benchmark, but real-world fuel economy can change. Aggressive driving, frequent short trips, and extended idling will all hurt your MPG. Careful acceleration, anticipating traffic, and minimizing braking can help you get closer to, or even exceed, the EPA estimates. Expect a slight dip in fuel economy due to increased wind resistance when driving with the top down, which many A3 Cabriolet owners do. To compare A3 MPG across all years, visit A3 MPG across all years.

How it compares

The A3 Cabriolet’s fuel economy positions it within its class. The BMW 2 Series Convertible, in its 230i version, gets about 24 MPG combined. The Buick Cascada, a more affordable convertible that is now discontinued, gets about 23 MPG combined. The A3 Cabriolet delivers a better driving experience and more premium features. While not the most fuel-efficient choice, its excellent handling, upscale interior, and open-air capability make it attractive to buyers who value those features. Compare all Audi fuel economy data for a wider view of fuel efficiency across the brand. The Mazda MX-5 Miata is different. It’s known for driving pleasure and lightweight build, achieving about 30 MPG combined. Miata buyers prioritize driving feel and care less about rear seat space or premium features. The A3 Cabriolet buyer values the luxury experience more and accepts some fuel economy trade-off.

Tips to maximize efficiency

Use the Audi Drive Select system. Choosing “Efficiency” mode changes the engine and transmission mapping to prioritize fuel economy by upshifting earlier and reducing throttle response. This won’t drastically change the A3 Cabriolet, but it can add a few extra miles per gallon, especially on highway trips.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, making the engine work harder and use more fuel. Check your tire pressures regularly and inflate them to the manufacturer’s recommended levels, usually found on a sticker inside the driver’s side doorjamb.

Avoid accelerating and braking hard. Gentle inputs allow the engine and transmission to operate more efficiently. Anticipate traffic and maintain a consistent speed to minimize sudden stops and starts.

Keep the top up at higher speeds. While driving with the top down is appealing, it increases aerodynamic drag, especially at highway speeds. Consider keeping the top up for long road trips to save fuel.