25 MPG combined is what you’ll get for effortless grand touring in a beautifully sculpted four-door coupe. The 2021 BMW 840i Gran Coupe, with its smooth 3.0L inline-six and exquisitely crafted interior, doesn’t apologize for prioritizing driving pleasure over Prius-like efficiency. It knows exactly who its customers are , successful professionals, empty-nesters, and style-conscious individuals who value a statement as much as a smooth ride and it delivers the experience they expect.

City and highway performance

While the combined figure of 25 MPG is useful for broad comparisons, the individual city and highway numbers tell a more complete story. The 840i Gran Coupe achieves 22 MPG in the city. This reflects the stop-and-go nature of urban driving, where the engine spends more time idling and accelerating. Out on the open road, the 840i Gran Coupe shines, delivering a respectable 29 MPG. This is where the engine and eight-speed automatic transmission can settle into a comfortable cruise, taking advantage of the car’s aerodynamic shape to minimize fuel consumption at higher speeds. This car is built for long distances, and its highway fuel economy reflects that intentional design.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 BMW 840i Gran Coupe at $2,300. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, and using the national average fuel price. Keep in mind that this is just an estimate. Your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and local fuel prices. If you drive more aggressively, spend more time in city traffic, or use premium gasoline, expect to spend more than the $2,300 estimate. Consider the long-term ownership cost and check 840I MPG across all years of production.

Real-world expectations

EPA estimates are a useful starting point, but real-world fuel economy can often differ. Observations from owners and independent tests often fall a bit short of the official figures, due to variations in driving style, traffic conditions, and even tire inflation. In city driving, expect figures closer to the low 20s and potentially just under the advertised 29 MPG on the highway if you enjoy exploring the engine’s performance capabilities. Ultimately, the 840i Gran Coupe’s fuel economy is highly dependent on how you drive it.

How it compares

The 2021 BMW 840i Gran Coupe faces competition from luxury four-door coupes like the Mercedes-Benz CLS 450 4MATIC, which delivers around 25 MPG combined. The Audi A7, with its turbocharged V6, offers similar performance and fuel economy, also hovering around 25 MPG combined for the 55 TFSI trim. The Porsche Panamera 4, while offering a more sporting driving experience, achieves a slightly lower 23 MPG combined. This comparison puts the 840i Gran Coupe right in the mix, with its fuel economy being a secondary consideration for buyers primarily focused on its styling, performance, and prestige. For a broader view, take time to review all Bmw fuel economy data, especially when considering different models within the brand.

Tips to maximize efficiency

Use the BMW’s driving modes. The 840i Gran Coupe offers different driving modes, including an Eco Pro mode, which optimizes engine and transmission settings for maximum fuel efficiency. Engaging this mode will dull throttle response and encourage earlier upshifts, increasing MPG at the expense of outright acceleration. If you want to prioritize efficiency on longer drives, this is your best bet.

Practice smooth driving habits. Avoid aggressive acceleration and hard braking, as these habits consume significantly more fuel. Anticipate traffic flow and maintain a consistent speed whenever possible. The 840i Gran Coupe’s comfortable ride and refined powertrain make it easy to drive smoothly and efficiently.

Ensure proper tire inflation. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate your tires to the recommended pressure. This is especially important on a heavier vehicle like the 840i, as it makes a noticeable difference.

Minimize idling. Letting your engine idle for extended periods wastes fuel. If you’re stopped for more than a minute or two, turn off the engine. The 840i’s automatic start/stop system, while sometimes intrusive, is designed to minimize idling in stop-and-go traffic. Consider using it in city environments.

Use cruise control on the highway. Engage cruise control on long highway drives to maintain a consistent speed and optimize fuel economy. The 840i’s adaptive cruise control system can further enhance efficiency by automatically adjusting your speed to maintain a safe following distance from other vehicles.