34 MPG combined isn’t going to win any hypermiling competitions, but it’s a sweet spot for the 2017 Audi A3 e-tron. It’s the efficiency result of a calculated compromise: a plug-in hybrid powertrain wrapped in a premium package that appeals to buyers prioritizing advanced technology as much as outright fuel savings.

City and highway performance

The A3 e-tron’s fuel economy doesn’t drastically change depending on the environment. The EPA estimates 33 MPG in the city and 36 MPG on the highway. This consistency suggests a balanced hybrid system that provides meaningful electric assistance in both stop-and-go traffic and during sustained cruising. The 1.4L 4-cylinder engine, when working alone, is relatively efficient, and the electric motor provides a supplemental boost, reducing the engine’s workload and keeping fuel consumption in check. The automatic (AM-S6) transmission is also programmed to maximize efficiency, selecting the best gear for any given situation.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Audi A3 e-tron at exactly $1,700. This figure assumes 15,000 miles of driving per year, with a mix of city and highway conditions, using the national average fuel price at the time of calculation. While individual results may vary based on driving habits and local fuel costs, this $1,700 benchmark provides a standardized way to compare the A3 e-tron’s running costs to other vehicles. Remember that electricity used for charging is not factored into this $1,700 figure. Depending on how often you charge, and electric rates in your area, your personal yearly cost could be significantly different.

Real-world expectations

The A3 e-tron’s fuel economy is linked to charging habits. Owners who are diligent about plugging in frequently, maximizing electric-only range, will likely surpass the EPA’s 34 MPG combined figure. On the other hand, those who primarily treat it as a traditional hybrid, rarely using its charging capability, might see numbers closer to a conventional gasoline-powered car. Aggressive driving will also drop the MPG below EPA results. The A3 e-tron rewards a smooth driving style that allows the electric motor to contribute effectively.

How it compares

Compared to other plug-in hybrids of its era, the 2017 A3 e-tron occupies a specific niche. The Toyota Prius Prime, for example, offered superior fuel economy (54 MPG combined) but lacked the A3’s luxurious features and engaging driving dynamics. A BMW 330e offers a slightly sportier driving dynamic and similar levels of premium features when compared to the A3 e-tron, but its MPG of 34 combined is roughly equivalent. Someone cross-shopping these vehicles is making a decision based on brand preference and specific features, not simply on MPG ratings. For those considering non-plug-in hybrids, the Lexus CT 200h, with its 42 MPG combined, provided significantly better fuel economy in a similar size class, albeit with noticeably less power and prestige. For all Audi fuel economy data, seeing where Audi’s lineup stands will help in decision making.

Tips to maximize efficiency

Charge the A3 e-tron whenever possible. Even short top-ups can significantly extend the electric-only range and reduce gasoline consumption. Make it a habit to plug in at home and explore public charging options to keep the battery topped off.

Use “Audi Drive Select” to optimize for efficiency. Selecting the “Efficiency” mode adjusts throttle response, transmission mapping, and climate control to minimize energy consumption. This mode is especially useful for highway driving and longer trips where maximizing fuel economy is the goal.

Practice smooth acceleration and braking. Anticipate traffic flow and avoid abrupt starts and stops. Gentle acceleration allows the electric motor to contribute more effectively, and regenerative braking captures energy during deceleration, replenishing the battery.

Monitor tire pressure regularly. Underinflated tires increase rolling resistance, which hurts fuel economy. Check tire pressure at least once a month and maintain the recommended levels specified in the owner’s manual. Consider using an accurate digital tire pressure gauge to ensure precise readings.

Reduce unnecessary weight in the vehicle. Extra cargo adds load, forcing the engine and motor to work harder. Remove any items from the trunk or backseat that are not essential for your daily commute. For A3 MPG across all years, comparing fuel economies against various models can provide insight.