23 MPG combined is the reality for the 2015 BMW 640i xDrive Gran Coupe, a stylish four-door coupe that prioritizes looks and smooth power over outright efficiency. This isn’t a car purchased by someone obsessing over fuel costs; it’s a statement about success, taste, and a desire for grand touring comfort. Buyers in this segment value the sleek design, the prestigious badge, and the sophisticated driving experience its turbocharged engine delivers. The fuel bill is a secondary consideration, though still on their radar.

City and highway performance

The EPA estimates the 2015 BMW 640i xDrive Gran Coupe achieves 20 MPG in the city and 29 MPG on the highway. The city figure reflects the realities of stop-and-go traffic where the engine’s start/stop system plays a role, and the highway number represents the vehicle’s sweet spot. At cruising speeds, the turbocharged inline-six settles into a relaxed rhythm for relatively efficient long-distance hauls.

The xDrive all-wheel-drive system adds weight but provides confident traction in all weather conditions, a key selling point for buyers in northern climates. The eight-speed automatic transmission is expertly tuned to keep the engine in its optimal power band, contributing to both performance and fuel economy.

Annual fuel cost

Based on EPA estimates of 15,000 miles driven per year and national average fuel prices, the 2015 BMW 640i xDrive Gran Coupe has an annual fuel cost of $2,500. This figure is based on the vehicle’s combined MPG rating and can fluctuate depending on individual driving habits and variations in gasoline prices.

While not insignificant, this expense is typically factored into the overall cost of ownership for vehicles in this luxury segment. Owners are generally more concerned with the overall ownership experience, including maintenance, insurance, and depreciation, than with squeezing every last mile from each gallon.

Real-world expectations

While the EPA numbers provide a useful benchmark, real-world fuel economy for the 2015 BMW 640i xDrive Gran Coupe can vary. Aggressive driving, frequent short trips, and prolonged idling will all decrease fuel efficiency. On the other hand, consistent highway driving at moderate speeds should allow drivers to approach or even slightly exceed the EPA’s 29 MPG highway estimate.

Premium fuel is recommended, which further impacts the overall cost of fueling this vehicle. 640I MPG across all years can vary.

How it compares

Compared to other four-door coupes in its class, the 2015 BMW 640i xDrive Gran Coupe’s fuel economy is about average. For example, the Audi A7 3.0T equipped with quattro all-wheel drive, a direct competitor, achieves a slightly better 24 MPG combined. The Mercedes-Benz CLS400 4MATIC, another rival, also hovers around 23 MPG combined. The Porsche Panamera, while offering more powerful engine options, generally sacrifices fuel economy, with base models achieving similar numbers but higher-performance variants dipping significantly lower.

For buyers considering all Bmw fuel economy data, it’s about finding a balance between performance, luxury, and running costs. The BMW offers an appealing blend of all three.

Tips to maximize efficiency

Take advantage of the driving mode selector. The “Eco Pro” mode optimizes engine and transmission settings for maximum fuel efficiency. While it may slightly reduce throttle response, it’s an effective way to conserve fuel during everyday commuting.

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

Anticipate traffic flow and practice smooth acceleration and braking. Avoid sudden bursts of speed and hard braking, as these actions significantly reduce fuel efficiency. Maintaining a steady pace and anticipating traffic conditions will help you conserve fuel.

Minimize idling time. If you anticipate stopping for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, and prolonged idling wastes fuel unnecessarily. Use the Auto Start-Stop function if it doesn’t bother you.

Reduce unnecessary weight. Carrying extra cargo in the trunk or on the roof rack impacts fuel economy. Remove any items you don’t need and consider removing the roof rack when not in use to reduce aerodynamic drag.