25 MPG combined won’t win any hypermiling awards, but for the 2018 Audi A3 Cabriolet quattro with its 2.0L turbocharged engine and all-wheel drive, it is an acceptable trade-off for the open-air driving experience and sure-footedness that define this compact luxury convertible. Buyers aren’t prioritizing ultimate fuel efficiency; they’re after a stylish, fun-to-drive vehicle with premium features, and the A3 Cabriolet delivers that while remaining reasonably economical.

City and highway performance

The EPA estimates for the 2018 Audi A3 Cabriolet quattro are split into 22 MPG in the city and 30 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, where the turbocharged engine works harder to overcome inertia and the automatic transmission goes through frequent gear changes. The highway number shows the benefits of cruising at a steady speed, allowing the engine to operate more efficiently and take advantage of the transmission’s higher gears. The difference between these figures highlights the importance of considering your typical driving environment when evaluating this car’s fuel economy.

Annual fuel cost

The EPA estimates an annual fuel cost of $1,750 for the 2018 Audi A3 Cabriolet quattro. This figure is based on driving 15,000 miles per year and using national average fuel prices. Individual driving habits and local fuel costs will affect the actual amount you spend, but this figure provides a useful benchmark for comparing the A3 Cabriolet to other vehicles. Premium fuel is recommended for the A3 Cabriolet’s engine, so the cost per gallon will likely be higher than regular unleaded.

Real-world expectations

The EPA estimates represent a controlled environment. In the real world, factors like aggressive acceleration, frequent short trips, and weather conditions can all impact fuel economy. Some drivers might achieve the EPA’s highway figure on long road trips, but consistently matching the combined number requires a conscious effort to drive efficiently. Expect the A3 Cabriolet’s fuel consumption to fluctuate depending on your driving style and the type of roads you typically travel.

How it compares

Compared to its competitors, the 2018 Audi A3 Cabriolet quattro resides in a specific niche. Some competitors, particularly front-wheel-drive models, achieve slightly better fuel efficiency. For example, the BMW 230i Convertible (rear-wheel drive) typically sees around 24 MPG combined but lacks the A3’s quattro all-wheel drive system. The Mercedes-Benz C300 Cabriolet often achieves comparable numbers. Understanding these MPG differences is essential for buyers weighing the benefits of all-wheel drive against potentially improved fuel economy.

Tips to maximize efficiency

Avoid aggressive acceleration. The 2.0L turbo engine delivers satisfying power, but frequent hard acceleration will negatively impact fuel consumption. Smooth and progressive throttle inputs will help keep the engine operating in its most efficient range. Be mindful of turbo lag, anticipating your power needs can prevent unnecessary bursts of acceleration.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly, ideally every other week, and inflate them to the manufacturer’s recommended pressure (found on the doorjamb sticker). This simple step can noticeably improve fuel economy and tire life.

Reduce unnecessary weight. Carrying extra weight in the trunk or passenger compartment reduces fuel economy. Remove any items you don’t need on a regular basis to lighten the load and improve efficiency. Minimizing aerodynamic drag, such as removing roof racks when not needed, can also help.

Use the “Audi Drive Select” system carefully. The A3 Cabriolet typically offers different driving modes, Comfort, Auto, Dynamic, and Individual. Dynamic mode provides a sportier driving experience, but Comfort is designed for optimal fuel efficiency. Select the appropriate mode based on your driving conditions and priorities. Learn more about all Audi fuel economy data to better understand how technology can save on fuel costs.

Plan your trips and avoid peak traffic. Idling in traffic consumes fuel without covering any distance. Plan your routes to avoid congested areas and times of day whenever possible. Consider using navigation apps to find alternate routes that may be longer in distance but shorter in travel time. Also check A3 MPG across all years to consider other model years with different powertrain options.