24 MPG combined is an acceptable figure for the 2025 BMW 840i Gran Coupe. This isn’t a hybrid designed to sip fuel; it’s a stylish four-door coupe prioritizing driving pleasure and luxurious features, supported by BMW’s sporting heritage. The buyers drawn to the 840i Gran Coupe understand this compromise. They want sleek design, a comfortable and tech-laden cabin, and the effortless power delivery of BMW’s smooth inline-six engine. Fuel efficiency is a consideration, but it’s secondary to the overall experience this car provides.

City and highway performance

The 840i Gran Coupe’s EPA ratings break down to 21 MPG in the city and 29 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, where the engine works harder and the aerodynamic benefits of the Gran Coupe shape are negated. The 29 MPG highway rating is more indicative of its long-distance cruising ability. On the open road, the 840i Gran Coupe settles into a quiet gait, the smooth engine barely working, contributing to relatively efficient travel. This split performance is important to understand: urban dwellers might see numbers closer to 21 MPG, while owners who frequently take highway trips could reasonably expect to approach, or even slightly exceed, the 29 MPG rating.

Annual fuel cost

The EPA estimates that the 2025 BMW 840i Gran Coupe will cost $2,400 per year to fuel. This figure is based on driving 15,000 miles annually, using a national average fuel price. Of course, the actual cost will fluctuate depending on local fuel prices and individual driving habits. Someone who drives significantly more than 15,000 miles each year will naturally spend more on fuel. Similarly, drivers in areas with higher gas prices will also see a higher annual fuel bill. Even with those variables, $2,400 serves as a reasonable benchmark when considering the ongoing cost of ownership.

Real-world expectations

While the EPA provides standardized testing data, real-world MPG figures can vary. Factors such as driving style, traffic conditions, and even tire pressure can affect fuel economy. Aggressive acceleration, frequent hard braking, and prolonged idling will all decrease MPG. Regular maintenance, including ensuring proper tire inflation and timely oil changes, can help maintain optimal fuel efficiency. Owners often achieve figures close to the EPA estimates, demonstrating that the 840i Gran Coupe’s ratings are generally representative of its real-world performance. Keep in mind you can also access 840I MPG across all years to get a sense of past performance.

How it compares

Compared to rivals, the 840i Gran Coupe’s fuel economy is competitive within its class. The Mercedes-Benz CLS 450, for example, achieves a similar 25 MPG combined with its inline-six engine. The Audi A7, with its turbocharged V6, lands around 24 MPG combined as well. Opting for a more powerful engine, such as the BMW M850i Gran Coupe with its V8, will result in a significant drop in fuel economy, down to approximately 19 MPG combined. These comparisons highlight the 840i Gran Coupe’s balanced approach: it delivers ample performance without sacrificing too much fuel efficiency. The buyers of the 840i Gran Coupe are aware of these trade-offs and appreciate that they are not dealing with the worst offender in the segment. For other BMW models, see all Bmw fuel economy data.

Tips to maximize efficiency

Engage Eco Pro mode. The 840i Gran Coupe features selectable driving modes that affect throttle response, transmission mapping, and even steering feel. Eco Pro mode prioritizes fuel efficiency by optimizing these parameters. While it might slightly reduce the urgency of acceleration, it can make a noticeable difference in fuel consumption, especially during city driving where fuel efficiency is challenged.

Practice smooth acceleration and braking. Abrupt acceleration and hard braking waste fuel. Anticipate traffic flow and maintain a consistent speed whenever possible. Gentle acceleration allows the engine to operate more efficiently, and smooth braking recovers energy that would otherwise be lost as heat. This is true for all cars, but even more important for a car that is tuned for performance like the 840i Gran Coupe.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended level, which is typically found on a sticker inside the driver’s side doorjamb. This simple step can improve fuel economy noticeably and extend the life of your tires.

Minimize idling. Letting the engine idle for extended periods consumes fuel without covering any distance. If you’re stopped for more than a minute, it’s generally more efficient to turn off the engine. Modern engines are designed to restart quickly and efficiently, so you won’t experience any significant wear and tear from frequent restarts. This won’t be a dramatic change to your fuel spending, but it can add up over time.