In a world where fuel efficiency and sustainability are becoming increasingly important, some cars and SUVs still prioritize power and performance over conserving gasoline. For automotive enthusiasts who favor horsepower and luxury, even at the expense of fuel economy, 2025 presents a lineup of vehicles that will satisfy the most fastidious petrolheads. This article delves into the top ten least fuel-efficient supercars and SUVs of the year, showcasing machines that command both awe and hefty fuel bills.
10. Ferrari Purosangue
The Ferrari Purosangue’s gas-guzzling pedigree is clear: its naturally aspirated 6.5-liter V12 delivers a ferocious 725 horsepower but manages just 11 mpg city, 15 mpg highway, and a dismal 12 mpg combined. This makes it the least fuel-efficient SUV on the market in 2025—making enthusiasts grin, but environmentalists wince.
9. Lamborghini Revuelto
The Lamborghini Revuelto delivers astonishing hybrid V12 performance but consumes a shocking amount of fuel for a new supercar. EPA estimates peg it at just 10 mpg in the city, 17 mpg on the highway, and only 12 mpg combined, making it one of the thirstiest new cars available today.
8. Bugatti Mistral
The Bugatti Mistral is currently America’s least fuel-efficient car, boasting a staggering EPA rating of just 8 mpg in the city, 12 mpg on the highway, and a combined 9 mpg. Its quad-turbocharged 8.0L W16 engine delivers breathtaking power, but be ready to spend thousands annually at the pump for this privilege.
7. Cadillac Escalade-V
The 2025 Cadillac Escalade-V is a supercharged powerhouse with a 682-hp V8, but its brute force comes at a steep fuel cost. EPA ratings peg it at just 13 mpg combined, with 11 mpg in the city and 17 mpg on the highway—one of the thirstiest SUVs on the road today.
6. Dodge Durango SRT Hellcat
Packing a supercharged 6.2L HEMI V8 with over 700 horsepower, the 2025 Dodge Durango SRT Hellcat is a high-performance SUV that guzzles fuel at an incredible rate. With an EPA-estimated 12 mpg city and 17 mpg highway, its combined 13 mpg places it firmly among the thirstiest supercars available today.
5. Rolls-Royce Cullinan
The Rolls-Royce Cullinan is a super-luxury SUV that spares no expense on power or opulence—and it shows at the pump. Powered by a twin-turbo 6.7-liter V12, the Cullinan achieves just 12 mpg city and 20 mpg highway, making it one of the thirstiest vehicles on the road.
4. Aston Martin DBX707
The Aston Martin DBX707 is the world’s most powerful luxury SUV, boasting a 697-hp twin-turbocharged 4.0-liter V8. While it delivers thrilling acceleration and unmistakable British flair, its appetite for fuel is equally impressive. The 2025 DBX707 is rated at just 15 mpg in the city, 20 mpg on the highway, and 17 mpg combined by the EPA. This places it among the thirstiest SUVs on the market, proving that ultimate performance and efficiency rarely go hand in hand.
3. Bentley Bentayga
The Bentley Bentayga stands out for its luxurious appointments and powerful twin-turbocharged V8, but it’s also notorious for guzzling fuel. The 2025 V8 model achieves just 14 mpg city and 21 mpg highway—among the lowest in the super-SUV world—making it a top gas-burner on this list.
2. BMW X5 M Competition / X6 M Competition
The BMW X5 M Competition and X6 M Competition are notorious fuel guzzlers, each powered by a 617-hp hybridized twin-turbo V8. Both receive an EPA-estimated 13 mpg city, 18 mpg highway, and just 15 mpg combined—among the lowest for any super SUV, emphasizing thrilling speed over efficiency.
1. Mercedes-Benz GLS600 Maybach
The Mercedes-Benz GLS600 Maybach epitomizes luxury and excess—and its fuel economy matches its opulence. Its 4.0-liter twin-turbo V8 hybrid engine delivers 550 horsepower but burns through fuel at just 13 mpg city and 18 mpg highway, earning a low combined EPA rating of 15 mpg—among the thirstiest SUVs today.
Conclusion:
While these vehicles may not win any awards for eco-friendliness, they continue to capture the imagination with their blend of luxury, power, and performance. Their impressive specifications come with a significant environmental cost, concurrently highlighting the ongoing tension between automotive indulgence and ecological responsibility. As we embrace the innovations and challenges of the future, these examples of opulent excess may serve as reminders of the automotive industry’s complex relationship with sustainability.
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