The Mercedes EQS and BMW iX xDrive50 lead the market with EPA-rated ranges above 400 miles on a single charge

The Mercedes-Benz EQS sedan currently ranks among the longest-range electric vehicles available in the United States, with EPA estimates reaching 453 miles for the rear-wheel-drive model. The BMW iX xDrive50 follows closely with 380 to 400 miles depending on configuration. Both vehicles use large battery packs—the EQS houses up to 107.8 kilowatt-hours—and aerodynamic designs that reduce energy loss at highway speeds.

Range varies significantly by model year, battery size, drivetrain (rear-wheel versus all-wheel drive), and EPA test conditions. A vehicle rated at 400 miles will typically deliver 300 to 350 miles in real-world driving, especially in cold weather or at highway speeds. Manufacturers publish EPA estimates, which use a standardized laboratory test, but actual range depends on driving habits, terrain, temperature, and how much battery capacity you use before recharging.

Key Takeaways

  • The Mercedes EQS sedan and BMW iX SUV currently offer the highest EPA-rated ranges, both exceeding 380 miles on a full charge.
  • Real-world range is typically 20 to 30 percent lower than EPA estimates, especially in cold weather or at highway speeds above 65 mph.
  • Battery size and aerodynamic efficiency are the primary factors determining range; larger batteries and sleeker designs travel farther on the same charge.
  • Rear-wheel-drive versions of most models travel farther than all-wheel-drive versions because they use less energy to move the vehicle.
  • Range leaders change as manufacturers release new models and battery technology improves, so comparing current-year vehicles gives the most accurate picture.

How EPA range estimates are measured and why they differ from real driving

The EPA tests electric vehicles in a laboratory using a standardized driving cycle that simulates city and highway driving at moderate speeds and temperatures. The test does not account for cold weather, aggressive acceleration, highway cruising at 75 mph, or mountainous terrain—all of which reduce range significantly. A vehicle rated at 400 miles might deliver only 280 to 320 miles in winter or on a highway trip.

Manufacturers must publish EPA estimates on the window sticker and in advertising, so these numbers are the most reliable comparison point between models. However, they represent best-case conditions, not typical use. Real-world range depends on factors you control—speed, acceleration, climate control use—and factors you do not, such as outside temperature and road grade. Cold batteries are less efficient; a 20-degree day can reduce range by 20 to 40 percent compared to 70 degrees.

Long-range electric sedans and their EPA ratings

The Mercedes EQS 450+ (rear-wheel drive) leads with 453 miles of EPA-estimated range. The Tesla Model S Long Range offers 405 miles. The BMW i7 xDrive60 reaches 380 miles. The Lucid Air Pure delivers 420 miles. Each of these vehicles uses a battery pack between 85 and 112 kilowatt-hours and prioritizes aerodynamic efficiency—drag coefficient below 0.22—to stretch range.

Sedan body styles naturally achieve longer range than SUVs because they present less wind resistance. A sedan and SUV with identical battery size will see the sedan travel 10 to 15 percent farther. This is why the longest-range vehicles in the market are almost always sedans rather than crossovers or trucks. If you prioritize range above other factors, a sedan will deliver more miles per charge than a larger vehicle.

Long-range electric SUVs and crossovers

The BMW iX xDrive50 reaches 380 to 400 miles depending on model year and configuration. The Tesla Model X Long Range offers 348 miles. The Genesis GV70 Electrified achieves 330 miles. The Audi Q6 e-tron, released in 2024, reaches 370 miles. SUVs sacrifice some range compared to sedans because their taller, boxier shape creates more aerodynamic drag, but modern designs and large batteries have narrowed the gap.

If you need three-row seating or cargo space, the range trade-off is unavoidable. However, most three-row electric vehicles currently deliver between 250 and 310 miles of EPA range, which is sufficient for most daily driving and weekend trips when paired with access to a charger at home or work. The longest-range three-row option is the Tesla Model X, which seats up to seven and reaches 348 miles.

Battery size and efficiency: what actually determines range

Range is determined by two factors: battery capacity (measured in kilowatt-hours, or kWh) and efficiency (how many miles the vehicle travels per kilowatt-hour). A larger battery stores more energy. A more efficient vehicle uses less energy to travel the same distance. The Mercedes EQS achieves approximately 4.2 miles per kilowatt-hour; the Tesla Model 3 achieves approximately 4.8 miles per kilowatt-hour. Both are efficient, but the Model 3 uses less energy per mile, while the EQS carries a larger battery.

Efficiency depends on weight, aerodynamics, motor design, and drivetrain. Lighter vehicles and rear-wheel-drive vehicles are more efficient than heavier vehicles and all-wheel-drive vehicles. A 200-pound difference in curb weight can reduce range by 5 to 10 miles. This is why the same model often shows different range ratings for rear-wheel-drive and all-wheel-drive versions—the all-wheel-drive motor and battery management system add weight and energy loss.

How driving speed and weather affect real-world range

Highway driving at 75 mph reduces range by 20 to 30 percent compared to mixed city and highway driving at 55 mph average. This is because aerodynamic drag increases with the square of velocity; doubling your speed quadruples the drag force. A vehicle rated at 400 miles will deliver approximately 280 to 320 miles on a highway trip at sustained highway speeds.

Cold weather reduces range by 20 to 40 percent because batteries are less efficient in low temperatures and cabin heating consumes significant energy. A vehicle rated at 400 miles might deliver only 240 to 320 miles in 20-degree weather. Preheating the cabin while plugged in before departure, rather than using battery power to heat while driving, can recover 5 to 10 percent of lost range. Conversely, warm weather and moderate speeds maximize range; the same vehicle might exceed its EPA rating under ideal conditions.

Comparing range across model years and new releases

Battery technology and electric motor efficiency improve annually. A 2024 model typically offers 5 to 10 percent more range than the same model from 2022, using the same battery size, because manufacturers refine software, reduce weight, or improve aerodynamics. New platforms, such as the Chevrolet Blazer EV and Equinox EV released in 2023 and 2024, often achieve better efficiency than older designs because they are built from the ground up for electric powertrains rather than adapted from gasoline platforms.

If you are comparing vehicles across different model years, check the EPA label for the specific year you are considering. A 2023 Tesla Model S Long Range and a 2024 Tesla Model S Long Range may have different EPA ratings. Manufacturer websites and the EPA's fueleconomy.gov database list current ratings; these are more reliable than reviews or articles that may reference older model years.

Frequently Asked Questions

Does a longer-range electric car cost more?

Generally yes. Longer-range vehicles use larger battery packs, which are the most expensive component of an electric car. A 400-mile vehicle typically costs $5,000 to $15,000 more than a 250-mile version of the same model. However, price depends on trim level, features, and current incentives, so comparing specific configurations is necessary.

Can I actually drive 400 miles on a single charge in winter?

Unlikely. A 400-mile EPA rating in ideal conditions becomes 240 to 280 miles in 20-degree weather at highway speeds. If you live in a cold climate and regularly take long trips, plan for 60 to 70 percent of the EPA rating as a realistic expectation. Preheating while plugged in and driving at moderate speeds can improve this.

Is a 300-mile range electric car enough for most people?

Yes, for most daily driving. The average American drives 40 miles per day. A 300-mile vehicle covers a week of commuting on one charge. For road trips, you will need to plan charging stops, but most long-distance travel in electric vehicles involves 30 to 45 minute charging breaks every 200 to 250 miles anyway.

Do all-wheel-drive electric cars have significantly less range than rear-wheel-drive?

Yes, typically 10 to 15 percent less. All-wheel-drive adds a second motor, extra weight, and energy loss in the drivetrain. If maximum range is your priority, choose rear-wheel-drive. If you need traction in snow or ice, the range reduction is a necessary trade-off.

How does towing affect electric car range?

Towing reduces range by 20 to 40 percent depending on trailer weight and aerodynamics. A vehicle rated at 300 miles will deliver 180 to 240 miles while towing. Few electric vehicles are currently rated for towing; the Tesla Model X and Chevrolet Silverado EV are among the few options if towing is essential to your use case.