25 MPG combined is a reasonable, albeit not exceptional, figure for the 2022 BMW 840i Convertible. Absolute fuel efficiency isn’t likely to be the primary concern for those drawn to a luxurious, open-top grand tourer. This car is about the experience: the wind in your hair, the smooth surge of power from the inline-six, and the admiring glances you’ll receive while cruising along the coast. Fuel economy figures here are simply part of the ownership cost equation; a necessary consideration, but not the deciding factor.

City and highway performance

The EPA estimates the 2022 BMW 840i Convertible at 22 MPG in the city and 29 MPG on the highway. The city figure reflects the stop-and-go driving where the car’s weight and occasional need for spirited acceleration affect fuel economy. The highway MPG is more palatable; the 8-speed automatic transmission excels at finding the optimal gear for relaxed cruising, allowing the engine to loaf along and sip fuel relatively sparingly. Achieving that 29 MPG requires a disciplined right foot; aggressive acceleration will naturally diminish those numbers.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2022 BMW 840i Convertible is $2,300. This estimate is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, and assuming national average fuel prices. Fuel prices fluctuate considerably, and individual driving habits can significantly alter this figure. Someone who primarily uses the car for weekend jaunts and leisurely drives will likely spend less than the EPA estimate, while a driver with a heavier foot and more urban commuting will likely spend more.

Real-world expectations

While the EPA numbers provide a standardized benchmark, your own mileage will vary. The inline-six is responsive and loves to rev, and the temptation to exploit its smooth power delivery will inevitably impact fuel consumption. Expect to see figures in the low 20s in mixed driving, possibly dipping below 20 MPG with frequent short trips around town. On longer highway journeys at a steady pace, matching or even slightly exceeding the 29 MPG rating is achievable. Remember, this isn’t a car designed for economy; it’s about the joy of the drive.

How it compares

In the realm of luxury convertibles, the 840i faces competition from cars like the Mercedes-Benz SL, where the SL450, for instance, achieves around 21 MPG combined. Other options include the Porsche 911 Carrera Cabriolet, which can deliver around 20 MPG combined in some configurations. Comparing the 840I MPG across all years reveals a degree of consistency, reflecting the maturity of the powertrain. The Audi S5 Cabriolet, which offers all-wheel drive standard, posts around 24 MPG combined, making the choice less about outright fuel sipping and more about brand preference.

Tips to maximize efficiency

The 840i Convertible, by its very nature, isn’t designed to be a hypermiler’s dream. However, there are small, incremental adjustments you can make to improve your fuel economy. Use the “Eco Pro” driving mode, which remaps the throttle response and shift patterns to prioritize fuel efficiency. You’ll sacrifice some of the immediate responsiveness, but you’ll see a noticeable difference, particularly on longer trips.

Avoid unnecessary idling. Modern engines are designed to be restarted efficiently, and prolonged idling consumes fuel without covering any distance. If you’re waiting for more than a minute or two, it’s more fuel-efficient to switch off the engine.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consuming more fuel. Check your tire pressures regularly and inflate them to the recommended levels found on the driver’s side doorjamb.

Be mindful of your driving style. Smooth acceleration and gentle braking are key to maximizing fuel economy. Avoid abrupt changes in speed and try to anticipate traffic flow to minimize unnecessary braking and acceleration.

Consider removing unnecessary weight from the car. Excessive weight increases fuel consumption, so removing any unnecessary cargo from the trunk will help. For all all Bmw fuel economy data, be sure to check FuelEconomyHub.