27 MPG combined is respectable for the 2021 Subaru Legacy AWD 2.4L 4-cyl, and it’s a key part of this sedan’s value. It’s not trying to be a hybrid or a hyper-miler; it’s an affordable, comfortable, and safe family sedan with the added benefit of standard all-wheel drive. Legacy buyers prioritize sure-footedness in all weather conditions, and they understand that there’s a fuel economy trade-off compared to front-wheel-drive competitors. The Legacy’s fuel efficiency is simply good enough for its mission, not its defining characteristic. For those interested in comparing all Subaru fuel economy data, there are plenty of options.

City and highway performance

The 2021 Legacy with the 2.4L engine manages 24 MPG in the city, a figure largely dictated by stop-and-go traffic and the weight of the all-wheel-drive system. The continuously variable transmission (CVT), branded as AV-S8 by Subaru, plays a significant role here, keeping the engine in its most efficient operating range whenever possible. On the highway, the Legacy achieves 32 MPG. This number reflects the CVT’s ability to simulate higher gears for relaxed cruising, minimizing engine RPMs and maximizing fuel efficiency on longer trips. These numbers demonstrate solid everyday drivability and fuel mileage.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2021 Subaru Legacy AWD 2.4L 4-cyl is $1,600. This figure is based on driving 15,000 miles per year, with a roughly 55/45 split between city and highway driving, and using national average fuel prices. It’s a useful benchmark when comparing vehicles, but individual costs will vary depending on driving habits and local fuel prices. Keep in mind these numbers are estimates, and your personal fuel costs may be higher or lower.

Real-world expectations

While the EPA estimates provide a standardized comparison, real-world MPG in the 2021 Legacy can vary. Aggressive driving, frequent short trips, and carrying extra weight can all negatively impact fuel economy. Conversely, careful driving habits, regular maintenance, and using cruise control on the highway can help achieve figures closer to, or even slightly better than, the EPA estimates. The Legacy’s all-wheel-drive system, while excellent for traction, constantly engages the rear wheels, adding a bit of weight and friction that impacts fuel economy compared to front-wheel-drive rivals. It’s a conscious choice Legacy buyers make because safety and all-weather capability outweigh marginal MPG gains.

How it compares

The fuel economy of the 2021 Subaru Legacy AWD 2.4L needs to be considered against its competition. Consider the Toyota Camry; the non-hybrid AWD version gets an EPA-estimated 25 MPG combined. The Honda Accord, typically only offered with front-wheel drive, achieves up to 33 MPG combined in its most efficient non-hybrid form. Even the Nissan Altima, with its available all-wheel drive, manages up to 30 MPG combined. However, the Legacy’s 27 MPG combined isn’t dramatically lower, providing a decent compromise. Legacy owners consciously accept that slight MPG penalty for the year-round confidence that the sure-footed AWD provides. See LEGACY MPG across all years.

Tips to maximize efficiency

Gentle acceleration is key to maximizing fuel economy in the Legacy. The 2.4L engine responds well to a light foot, and the CVT is designed to keep the engine in its optimal efficiency range when you avoid aggressive throttle inputs. Anticipate traffic flow to minimize hard braking and unnecessary acceleration bursts.

Tire pressure significantly impacts fuel efficiency. Regularly check and maintain the recommended tire pressure, found on the door jamb. Underinflated tires create more rolling resistance, which forces the engine to work harder and consumes more fuel. Correct inflation ensures optimal contact with the road for better fuel economy and tire life.

Reduce unnecessary weight. Carrying extra weight in cargo areas or the trunk adds load to the vehicle, reducing fuel economy. Remove any items that are not essential for daily driving, especially heavy objects. Even small increments in weight reduction can yield a noticeable improvement over time.

Plan your routes strategically. Combine errands into a single trip to minimize cold starts, which are less fuel-efficient. Avoid peak traffic hours when possible, as stop-and-go driving significantly lowers MPG. Using navigation apps to find the most efficient route, avoiding congested areas, can also contribute to fuel savings.