25 MPG combined is an acceptable number for the 2015 BMW 640i Coupe. This isn’t a vehicle purchased for saving money; people buying a sleek, two-door grand tourer with a powerful inline-six aren’t prioritizing fuel efficiency over spirited driving. They want a blend of performance and luxury, and a bit of efficiency is simply a compromise.

City and highway performance

The EPA estimates the 2015 640i Coupe at 21 MPG in the city and 31 MPG on the highway. The city figure is reasonable for a car of this size and power, reflecting the stop-and-go nature of urban driving. The highway MPG is more impressive, showing the engine’s ability to cruise efficiently at sustained speeds. This makes the 640i a comfortable and economical choice for long distance journeys, the kind it was designed for. This car excels on winding backroads where its chassis and engine can be enjoyed, but the 640i’s mission is eating up miles in comfort, and that 31 MPG rating makes it far more appealing than something that gets, say, 26 MPG. For a better picture of Bmw fuel economy data, explore the brand-wide averages.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2015 BMW 640i Coupe at $2,300. This figure is based on driving 15,000 miles per year and using the prevailing national average fuel price for premium gasoline, which this car requires.

It’s important to note this is just an estimate; your actual fuel costs will vary depending on your driving habits, the type of driving you do, and the price of fuel in your area.

Real-world expectations

While the EPA estimates serve as a useful benchmark, real-world fuel economy often deviates. Expect to see figures close to the EPA estimates if you drive conservatively and primarily on the highway. However, if you frequently engage the 640i’s Sport mode, enjoy spirited acceleration, or spend most of your time in heavy city traffic, your MPG will likely fall below the official ratings. Regular maintenance, including tire inflation and timely oil changes, also play a role in maintaining optimal fuel efficiency. For more data, search for 640I MPG across all years.

How it compares

The 2015 BMW 640i Coupe’s fuel economy is competitive for its class. The Audi A7 3.0T, another stylish four-door coupe, delivers around 24 MPG combined. The Mercedes-Benz CLS550, with its V8 engine, comes in lower, around 20 MPG combined. The Porsche Panamera, depending on the trim, can range from the low teens to the mid-twenties, highlighting the impact of engine choice and performance focus.

The 640i sits right in the middle, and that suits its mission perfectly. The buyer who picks this car wants a degree of athleticism but doesn’t necessarily want to pay for it at the pump. They are happy to get in the mid-twenties and not apologize for it.

Tips to maximize efficiency

Take advantage of the 640i’s Driving Dynamics Control. Selecting “Eco Pro” mode optimizes engine settings, throttle response, and shift points to prioritize fuel efficiency. While it might temper the car’s sporty character, it can noticeably improve MPG, especially on longer trips.

Avoid excessive idling. Modern engines are more efficient when turned off and restarted, rather than left idling for extended periods. If you anticipate sitting for more than a minute or two, shut the engine down.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, reducing fuel economy. Check your tire pressure regularly (at least monthly) and inflate them to the manufacturer’s recommended pressure, found on the sticker inside the driver’s side doorjamb.

Use cruise control on the highway. Maintaining a consistent speed helps maximize fuel efficiency. Cruise control minimizes unnecessary acceleration and deceleration, contributing to better MPG on long highway drives.

Be mindful of your driving style. Aggressive acceleration and hard braking consume more fuel. Smooth, gradual acceleration and anticipating traffic conditions can significantly improve your fuel economy. Let that inline six breathe deep only when you really need to!