Fuel economy ratings for the 2027 model year show which vehicles take the most gasoline to run. A supercharged pickup sits at the bottom, with luxury sedans, SUVs and sports cars crowding close behind it. Here are twelve of the thirstiest vehicles, ranked by combined mpg and estimated yearly fuel cost.
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1. Ram 1500 (6.2L supercharged): Supercharged Thirst
The 6.2L supercharged Ram 1500 in four-wheel-drive form returns EPA rating of 12 mpg combined, the lowest figure of any non-electric 2027 vehicle on this list. The same listing puts annual fuel spending at $6,850.
That makes the pickup the benchmark for fuel cost among 2027 models. Buyers weighing the supercharged engine should treat the yearly total as a baseline, since the estimate rests on an assumed mix of city and highway driving and a set fuel price.
2. Cadillac Escalade V: Full-Size Luxury Burn
The all-wheel-drive Cadillac Escalade V is rated at 13 mpg combined, and fuel-cost figures estimate an annual fuel cost of $6,300 for the 2027 model year.
The rating places the high-performance Escalade just behind the Ram at the top of the thirst ranking. Owners who rack up long commutes or frequent road trips would likely see the yearly figure climb above that estimate, while light use would pull it lower still.
3. Rolls-Royce Cullinan: Ultra-Luxury SUV Thirst
Among the heaviest hitters on the list, the Rolls-Royce Cullinan posts EPA combined mpg of 13 mpg combined for 2027, with an estimated yearly fuel bill of $6,300.
That puts the SUV level with the Escalade V and with two Rolls-Royce sedans below it. For a buyer at this price level the fuel cost is a small line item, but the rating still marks the model as one of the least efficient non-electric vehicles of the year.
4. Rolls-Royce Ghost: Sedan Matches the SUV
The Rolls-Royce Ghost earns 2027 mpg listing of 13 mpg combined in 2027, identical to the larger Cullinan, and carries the same $6,300 annual fuel estimate.
A sedan landing on the same number as a tall SUV shows how little the body style matters at this end of the market. Anyone cross-shopping Rolls-Royce models on running costs will find no fuel savings at all from choosing the Ghost over the Cullinan in 2027.
5. Rolls-Royce Phantom: Flagship Fuel Bill
Rolls-Royce’s flagship, the Phantom, is listed at combined rating of 13 mpg combined for 2027, producing the same estimated annual fuel cost of $6,300 as the Ghost and Cullinan.
All three Rolls-Royce models in the ranking share one rating, so the brand claims a block of the top five. The estimate is a yardstick rather than a promise, and a Phantom driven mostly on short trips would be expected to land below its combined figure.
6. BMW M5: Super Sedan Appetite
The BMW M5 sedan checks in at mpg and cost estimate of 14 mpg combined for 2027, with annual fuel costs estimated at $5,850.
One mpg better than the Rolls-Royce trio, the performance sedan is the first entry on the list that dips below the $6,000 yearly mark. Drivers who use the car’s performance regularly should expect real-world consumption to track toward the thirstier side of that estimate, which assumes ordinary driving.
7. Chevrolet Corvette ZR1: Track Weapon, Pump Habit
At fuel economy entry of 14 mpg combined and $5,850 in estimated annual fuel cost, the 2027 Chevrolet Corvette ZR1 ties the BMW M5 for the same position in the ranking.
A two-seat sports car sharing a figure with a luxury sedan underlines how far the ZR1 sits from the efficient end of the market. For an owner who drives the car sparingly, the annual estimate would overstate actual spending, since it assumes a typical year of mileage.
8. Mercedes-Maybach S 680: Limousine Luxury Cost
The Mercedes-Maybach S 680 in 4Matic form is rated at 4Matic rating of 14 mpg combined for 2027, with an estimated $5,850 yearly fuel cost.
The long-wheelbase flagship lands level with the BMW M5 and Corvette ZR1, which shows that large luxury sedans and performance cars burn fuel at a similar rate. Chauffeured or stop-and-go use would likely sit under the combined number, a caveat for any buyer expecting steady highway driving.
9. Mercedes-AMG G 63: Boxy Off-Roader, Big Bill
The Mercedes-AMG G 63 climbs one step off the bottom of the group, returning annual fuel costs of 15 mpg combined and an estimated $5,500 in annual fuel costs for 2027.
That total is $1,350 below the Ram 1500 at the top of the list, yet it is still a hefty yearly sum for a single vehicle. As with every figure here, the estimate rests on assumed mileage and a fixed fuel price, so real bills will vary.
10. Chevrolet Corvette Z06: Corvette Takes Another Spot
A second Corvette makes the cut, as the Z06 is listed at combined mpg rating of 15 mpg combined with an estimated $5,500 annual fuel cost for 2027.
That is one mpg better than the ZR1 and the same result as the G 63. For prospective owners the yearly total matters less than the pattern: Chevrolet’s two most powerful Corvettes both appear in a ranking otherwise dominated by luxury sedans and SUVs.
11. Aston Martin Vanquish: British GT Gulps
The Aston Martin Vanquish reaches fuel economy listing of 16 mpg combined for 2027, and the listing estimates yearly fuel spending at $5,150.
Sixteen mpg is the best number among the twelve, though still low by any broad standard. The $1,700 gap to the Ram is a modest consolation, since the estimate still depends on assumed mileage and fuel prices, and a grand tourer driven gently may land closer to the rating.
12. Bentley Bentayga: Bentley Closes the List
Bentley’s Bentayga ends the ranking with 2027 EPA data of 16 mpg combined and an estimated annual fuel cost of $5,150 for 2027, matching the Aston Martin Vanquish.
A large luxury SUV equaling a sports coupe shows how closely clustered the final entries are. Owners comparing the Bentayga against the mainstream crossovers that populate most buyer lists would find the gap substantial, and the annual estimate still depends on assumed mileage and fuel prices.
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