81 MPG combined is not a figure typically associated with performance flagships, but the 2024 BMW i7 M70 xDrive Sedan (21 inch Wheels) operates differently. It’s a statement car, a technological tour-de-force that prioritizes luxury and blistering acceleration alongside, surprisingly, excellent efficiency. The i7 M70 isn’t bought by those primarily concerned with fuel stops; it’s chosen by executives, entrepreneurs, and individuals who value cutting-edge performance wrapped in an opulent, all-electric package. Its impressive range is a welcome benefit, not the primary reason for the purchase.

City and highway performance

The EPA estimates highlight the electric powertrain’s effectiveness in both urban and open-road scenarios. Achieving 79 MPG in the city shows the regenerative braking system’s ability to recapture energy, particularly in stop-and-go traffic. The 85 MPG highway rating demonstrates the aerodynamic efficiency and refined electric motor management at higher speeds. These numbers reinforce that the i7 M70 is no mere compliance car. Instead, its efficiency is integral to its advanced engineering.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 BMW i7 M70 xDrive Sedan (21 inch Wheels) at $950. This is based on driving 15,000 miles per year and using the national average electricity prices at the time of calculation. This figure is significantly lower than comparable gasoline-powered luxury sedans, a tangible benefit of choosing an all-electric vehicle. While the initial investment is substantial, the long-term running costs, particularly regarding energy, are significantly reduced. This figure is a benchmark, but your results will vary depending on electricity prices in your area and your personal driving style.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy numbers can vary. Driving habits, ambient temperature, and terrain all impact battery range and efficiency. Aggressive acceleration, frequent use of climate control, and sustained high speeds will deplete the battery faster. Owners should expect some deviation from the EPA estimates, particularly in extreme weather conditions. However, even with these factors considered, the i7 M70 remains an efficient vehicle in its class.

How it compares

The all-electric luxury sedan market is expanding, but the i7 M70 stands out. The Mercedes-Benz EQS 580 4MATIC Sedan, a direct competitor, achieves an EPA-estimated 97 MPGe combined. The Lucid Air Grand Touring boasts an impressive 137 MPGe combined. While the i7 M70’s MPGe might not be the highest, it delivers performance and luxury in a unique package. Buyers must weigh the slight efficiency differences against factors like brand preference, driving dynamics, and interior appointments. Consider that the Porsche Taycan Turbo S achieves a combined 76 MPGe, highlighting that performance often comes at a cost.

Tips to maximize efficiency

Use the BMW’s driving modes. The “Eco Pro” mode prioritizes efficiency by limiting throttle response and optimizing energy consumption. Consider using this mode during long highway stretches or when maximizing range is critical. Know that using “Sport” mode greatly decreases the vehicle’s efficiency, although it unleashes the full potential of the powertrain.

Take advantage of regenerative braking features. The i7 M70 allows you to adjust the level of regenerative braking. Higher levels recapture more energy when decelerating, which helps extend your driving range. Experiment with different settings to find the balance between regeneration and natural driving feel that suits you best.

Precondition the battery before driving. Use the BMW app or the vehicle’s infotainment system to preheat or precool the battery while plugged in. This optimizes battery performance and range, particularly in cold weather. Further, plugging in keeps the HVAC system from draining the battery while pre-heating or pre-cooling.

Maintain proper tire inflation. Correctly inflated tires reduce rolling resistance, improving overall efficiency. Check your tire pressure regularly and inflate them to the recommended levels, which can be found on the driver’s side doorjamb. The i7 is a heavy vehicle and low tire pressure will impact the efficiency, handling, and tire wear.

Plan your charging strategy. Take advantage of off-peak electricity rates to reduce charging costs. Install a Level 2 charger at home for faster and more convenient charging. Public charging location is often determined by convenience and price, but plan for the most efficient charging scenario to reduce range anxiety.

For all Bmw fuel economy data, FuelEconomyHub.com is a great place to start. Find I7 MPG across all years for a deeper dive into the i7 model line.