The 100 Least Fuel-Efficient Cars in 2021

Have you ever wondered what the least fuel efficient cars manufactured in 2021 are? In this article, we'll list out the worst 100 cars from 2021 for fuel efficiency with information on each of them!

How to Determine Fuel Efficiency

The list of the best fuel efficient cars on this page is based on one simple metric provided to us by the U.S. Department of Energy: the combined miles per gallon (MPG).

This metric is calculated by taking the total miles driven by the car and dividing it by the total gallons of fuel used.

Manufacturers provide this information to the Department of Energy, they provide it to us, and we provide it to you after sifting and organizing it.

The combined miles per gallon (MPG) is a measure of how much fuel the car uses per mile and is a good indicator of how efficient the car is. It's a combination of both city and highway driving, to give you a more overall accurate MPG.

With that out of the way, let's dive into the list. You can click the links in the table below to see more detailed information about each car.

Worst 2021 Cars by Miles per Gallon

The list below is sorted by the combined miles per gallon (MPG) of the car, with the highest MPG at the top. This list includes both electric and regular fuel cars.

Car Combined MPG Fuel Cost
Bugatti Chiron Pur Sport 10 $7,400
Lamborghini Aventador Coupe 10 $7,400
Lamborghini Aventador Roadster 10 $7,400
Lamborghini Aventador Sian Coupe 10 $7,400
Lamborghini Aventador Sian Roadster 10 $7,400
Bugatti Chiron 11 $6,700
Ram 1500 TRX 4WD 12 $6,150
Dodge Durango SRT AWD 13 $5,700
Ferrari 812 GTS 13 $5,700
Ferrari 812 Superfast 13 $5,700
Jeep Grand Cherokee Trackhawk 4WD 13 $5,700
Bentley Bentayga 14 $5,300
Chevrolet Silverado Cab Chassis 2WD 14 $4,450
Chevrolet Silverado Cab Chassis 4WD 14 $4,450
Ford GT 14 $5,300
Ford Shelby GT500 Mustang 14 $5,300
GMC Sierra Cab Chassis 2WD 14 $4,450
GMC Sierra Cab Chassis 4WD 14 $4,450
Jeep Wrangler 4dr 4WD 14 $5,300
Lamborghini Urus 14 $5,300
Lexus LX 570 14 $5,300
Mercedes-Benz AMG G63 14 $5,300
Rolls-Royce Cullinan 14 $5,300
Rolls-Royce Cullinan Black Badge 14 $5,300
Rolls-Royce Dawn 14 $5,300
Rolls-Royce Dawn Black Badge 14 $5,300
Rolls-Royce Ghost 14 $5,300
Rolls-Royce Ghost EWB 14 $5,300
Rolls-Royce Phantom 14 $5,300
Rolls-Royce Phantom EWB 14 $5,300
Rolls-Royce Wraith 14 $5,300
Rolls-Royce Wraith Black Badge 14 $5,300
Roush Performance Mustang 14 $5,300
Toyota Land Cruiser Wagon 4WD 14 $4,450
Toyota Sequoia 4WD 14 $4,450
Toyota Tundra 4WD 14 $4,450
Aston Martin DBX V8 15 $4,950
Audi RS Q8 15 $4,950
Bentley Continental GT 15 $4,950
Bentley Continental GT Convertible 15 $4,950
Bentley Flying Spur 15 $4,950
BMW X5 M 15 $4,950
BMW X5 M Competition 15 $4,950
BMW X6 M 15 $4,950
BMW X6 M Competition 15 $4,950
Chevrolet Silverado 4WD TrailBoss 15 $4,150
Chevrolet Silverado Cab Chassis 2WD 15 $4,150
Chevrolet Silverado Cab Chassis 4WD 15 $4,150
Dodge Challenger SRT Widebody 15 $4,950
Dodge Charger SRT Widebody 15 $4,950
Dodge Durango SRT AWD 15 $4,950
Ford F150 RAPTOR 37 4WD 15 $4,150
Ford F150 RAPTOR 4WD 15 $4,150
GMC Sierra Cab Chassis 2WD 15 $4,150
GMC Sierra Cab Chassis 4WD 15 $4,150
Infiniti QX80 4WD 15 $4,950
Jeep Grand Cherokee SRT 4WD 15 $4,950
Lamborghini Huracan 15 $4,950
Lamborghini Huracan 2WD 15 $4,950
Lamborghini Huracan Spyder 15 $4,950
Lamborghini Huracan Spyder 2WD 15 $4,950
Land Rover Range Rover LWB SVA 15 $4,950
Nissan Armada 4WD 15 $4,950
Roush Performance Mustang 15 $4,950
Toyota Sequoia 2WD 15 $4,150
Toyota Tundra 2WD 15 $4,150
Audi R8 16 $4,600
Audi R8 Spyder 16 $4,600
Audi S8 16 $4,600
BMW M760i xDrive 16 $4,600
BMW X3 M 16 $4,600
BMW X3 M Competition 16 $4,600
BMW X4 M 16 $4,600
BMW X4 M Competition 16 $4,600
Cadillac Escalade 2WD 16 $4,600
Cadillac Escalade 4WD 16 $4,600
Chevrolet Camaro 16 $4,600
Chevrolet Camaro 16 $4,600
Chevrolet Silverado 2WD 16 $3,900
Chevrolet Silverado 4WD 16 $3,900
Chevrolet Silverado 4WD 16 $3,900
Chevrolet Silverado 4WD TrailBoss 16 $3,900
Chevrolet Silverado 4WD TrailBoss 16 $4,600
Chevrolet Suburban 2WD 16 $4,600
Chevrolet Suburban 4WD 16 $3,900
Chevrolet Suburban 4WD 16 $4,600
Chevrolet Tahoe 2WD 16 $4,600
Chevrolet Tahoe 4WD 16 $4,600
Dodge Challenger SRT 16 $4,600
Dodge Challenger SRT 16 $4,600
Dodge Challenger SRT Widebody 16 $4,600
Ferrari F8 Spider 16 $4,600
Ferrari F8 Tributo 16 $4,600
Ford F150 RAPTOR 4WD 16 $3,900
Ford Transit T150 Wagon 2WD FFV 16 $3,900
Ford Transit T150 Wagon 4WD FFV 16 $3,900
GMC Sierra 2WD 16 $3,900
GMC Sierra 4WD 16 $3,900
GMC Sierra 4WD 16 $3,900
GMC Sierra 4WD 16 $4,600

Conclusion

The least fuel efficient car of 2021 is the Bugatti Chiron Pur Sport. It has a combined MPG of 10 and costs $7,400 per year to drive it.

Least Fuel Efficient Cars By Year

If you want to continue researching the worst fuel efficient cars of all time, you can also look at the list of cars by year.

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  • "The 100 Least Fuel-Efficient Cars in 2021". MPG Buddy. Accessed on October 5, 2022. http://mpgbuddy.com/least-fuel-efficient-cars-in-2021.

  • "The 100 Least Fuel-Efficient Cars in 2021". MPG Buddy, http://mpgbuddy.com/least-fuel-efficient-cars-in-2021. Accessed 5 October, 2022

  • The 100 Least Fuel-Efficient Cars in 2021. MPG Buddy. Retrieved from http://mpgbuddy.com/least-fuel-efficient-cars-in-2021.