23 MPG combined isn’t going to win any awards, but for the 2021 BMW 840i xDrive Coupe, it’s an acceptable number reflecting its mission: effortless grand touring with strong performance. This isn’t basic transportation; it’s a statement, a meticulously crafted machine intended to deliver a luxurious experience. Fuel economy, while not irrelevant, isn’t the main concern for buyers who choose this car.

City and highway performance

The EPA estimates the 840i xDrive Coupe will achieve 20 MPG in the city and 27 MPG on the highway. The city miles reflect the stop-and-go nature of urban driving, which taxes any engine, even one with a turbocharged engine and direct fuel injection such as the 840i’s. The highway number is more indicative of the car’s true potential, where the smooth 3.0L inline-six can stretch its legs and deliver surprisingly reasonable fuel consumption during long cruises. These figures are directly related to the slick-shifting 8-speed automatic transmission (S8) that always seems to find the correct gear to optimize for both performance and fuel economy. Remember that these numbers are estimates; aggressive driving will undoubtedly lower them, while a mindful approach can yield slightly better results.

Annual fuel cost

The EPA estimates that the 2021 BMW 840i xDrive Coupe will cost approximately $2,500 in fuel annually. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, using then-current national average fuel prices. It’s a useful data point for comparison, but remember it doesn’t account for individual driving habits or fluctuations in fuel prices. Expect that number to rise if you drive more aggressively, or spend more time in stop-and-go traffic. You might see a slightly lower annual fuel cost if you primarily use the 840i for long highway trips. Understanding this context is critical when budgeting for ownership.

Real-world expectations

EPA numbers provide a baseline, but real-world fuel economy for the 840i xDrive Coupe will vary based on driving style, road conditions, and even the weather. Drivers with a heavy foot will likely see figures closer to the low end of the EPA range, or even below. Expect to be closer to the stated figures if you prioritize smooth acceleration and maintain consistent speeds. It’s also important to consider that the 840i is equipped with xDrive, BMW’s all-wheel-drive system, which adds weight and friction, slightly impacting fuel economy compared to a rear-wheel-drive model. Owners in regions with inclement weather often consider the added traction and stability a worthwhile trade-off.

How it compares

The 2021 BMW 840i xDrive Coupe exists in a competitive segment of luxury grand tourers, and its fuel economy stacks up accordingly. The Mercedes-Benz S500 Coupe, with its 3.0L inline-six and 4Matic all-wheel drive, offers comparable performance but only manages around 21 MPG combined. The Lexus LC 500, though visually stunning and mechanically reliable, is typically found around 19 MPG combined due to its naturally aspirated V8 engine. The Porsche 911 Carrera 4, a smaller and lighter sports car, achieves similar MPG ratings in real-world testing. When you research all Bmw fuel economy data you will see that the 840i xDrive competes fairly well with its stablemates. To gain more perspective, you can also compare 840I MPG across all years.

Tips to maximize efficiency

Take advantage of the 840i’s driving modes. The “Eco Pro” mode optimizes engine settings, throttle response, and shift points to maximize fuel efficiency. The performance may be slightly dampened, but it can make a noticeable difference on longer trips, especially when cruising at steady speeds.

Pay attention to tire pressure. Properly inflated tires reduce rolling resistance, which directly impacts fuel economy. Check your tire pressure regularly and ensure it’s within the recommended range, typically found on a sticker inside the driver’s side door jamb.

Avoid aggressive driving habits. Hard acceleration, sudden braking, and excessive speeding all contribute to increased fuel consumption. Smooth, progressive acceleration and anticipating traffic flow can significantly improve your MPG.

Reduce unnecessary weight. Carrying extra cargo in the trunk adds weight to the vehicle, forcing the engine to work harder and consuming more fuel. Remove any unnecessary items to lighten the load and improve fuel efficiency.

Consider minimizing your use of the air conditioning. The AC compressor places load on the engine, slightly impacting fuel economy. Opt for fresh air ventilation when weather permits to reduce this load.