24 MPG combined is a reasonable figure for the 2025 BMW 840i Coupe, a car engineered for effortless grand touring rather than outright frugality. Buyers in this segment prioritize a potent engine, sleek design, and luxurious features. Fuel economy is a consideration, but rarely the deciding factor. The 840i delivers a blend of performance and style, and its efficiency, while not class-leading, avoids excessive consumption.

City and highway performance

The 840i’s EPA ratings break down to 21 MPG in the city and 29 MPG on the highway. The city figure reflects the realities of stop-and-go traffic, where the turbocharged 3.0L inline-six works harder. The highway MPG is more representative of the car’s natural habitat: open roads where the engine can settle into a relaxed cruise. You can expect to see that 29 MPG figure frequently on long road trips, making the 840i a comfortable and relatively efficient companion for extended journeys. The smooth-shifting eight-speed automatic transmission (S8) plays a crucial role in optimizing both city and highway fuel consumption.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2025 BMW 840i Coupe at $2,400. This figure is based on driving 15,000 miles per year and using national average fuel prices. Individual spending will vary based on driving habits, local gas prices, and the type of fuel used. However, $2,400 provides a benchmark for prospective owners to factor into their annual running costs. The EPA arrived at this number assuming fuel prices at roughly $4/gallon given current national average fuel prices. To see all Bmw fuel economy data, check our research.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy often differs. Aggressive driving, frequent short trips, and extended idling can all negatively impact fuel consumption. However, careful driving, consistent highway speeds, and proper vehicle maintenance can help achieve figures closer to the EPA estimates. Owners report that the 840i’s fuel economy is heavily dependent on driving style. Drivers with a lighter foot can often exceed the highway MPG rating, while those who frequently use the engine’s power will see significantly lower numbers overall. Owners looking into 840I MPG across all years can inform their purchasing decision.

How it compares

The 840i’s fuel economy places it competitively within its class. The Porsche 911 Carrera, for example, achieves a similar 24 MPG combined, while offering sharper handling and performance. The Mercedes-Benz CLS 450 gets 25 MPG Combined from its turbo inline-6, positioning it slightly above the 840i for fuel efficiency. Audi’s S5 Coupe posts 24 MPG combined. These comparisons matter because they highlight the trade-offs in this segment. Buyers are trading slightly lower fuel economy for the prestige, performance, and luxurious experience offered by these premium coupes.

Tips to maximize efficiency

Driving smoothly is important. Avoid rapid acceleration and hard braking, as these actions significantly increase fuel consumption. Anticipate traffic flow and maintain a consistent speed to minimize wasted energy.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate to the recommended levels listed on the doorjamb sticker.

Reduce unnecessary weight in the vehicle. Extra cargo adds to the car’s overall weight, requiring the engine to work harder and consume more fuel. Remove any items you don’t need to carry regularly.

Use the car’s driving modes carefully. The 840i typically offers an “Eco” or “Comfort” mode optimized for fuel efficiency. Select these modes when driving conditions allow, but don’t hesitate to engage “Sport” mode when you want to enjoy the car’s full performance potential.

Consider the type of fuel you’re using. Most owners use premium-grade fuel. Some owners report that this fuel grade provides better fuel economy overall.