Rankings · 2021

Least fuel-efficient small cars of 2021

Among 71 small cars from 2021 in the database (one per model family), the 2021 Ford Shelby GT500 Mustang is the least fuel-efficient at 16.8 l/100km, against a class average of 10.1 l/100km. The spread from best to worst is 3.6–16.8 l/100km. Electric vehicles are ranked separately by range.

Ranked71one per model family
Average10.1 l/100km
Leader2021 Ford Shelby GT500 Mustang

Top 10

12021 Ford Shelby GT500 Mustang16.8 l/100km
22021 Rolls-Royce Dawn16.8 l/100km
32021 Bentley Continental GT Convertible15.7 l/100km
42021 Aston Martin DBS13.8 l/100km
52021 BMW M8 Competition Convertible13.8 l/100km
62021 Ford Mustang Mach 113.8 l/100km
72021 Porsche 911 Turbo13.8 l/100km
82021 Aston Martin DB11 V1213.1 l/100km
92021 Ferrari Portofino13.1 l/100km
102021 Lexus LC 500 Convertible13.1 l/100km

Full ranking

#VehicleCombinedvs avgCO2WeightRecallsNCAP
12021 Ford Shelby GT500 Mustang16.8 l/100km+67%392.1 g/km1,906.9 kg——
22021 Rolls-Royce Dawn16.8 l/100km+67%392.7 g/km2,635 kg——
32021 Bentley Continental GT Convertible15.7 l/100km+56%373.4 g/km2,414 kg——
42021 Aston Martin DBS13.8 l/100km+37%324.4 g/km1,845 kg——
52021 BMW M8 Competition Convertible13.8 l/100km+37%323.1 g/km1,952 kg——
62021 Ford Mustang Mach 113.8 l/100km+37%325 g/km1,761.8 kg——
72021 Porsche 911 Turbo13.8 l/100km+37%320.6 g/km1,665 kg——
82021 Aston Martin DB11 V1213.1 l/100km+30%308.8 g/km1,854 kg——
92021 Ferrari Portofino13.1 l/100km+30%301.4 g/km1,705.1 kg1—
102021 Lexus LC 500 Convertible13.1 l/100km+30%303.9 g/km2,059.3 kg——
112021 Nissan GT-R13.1 l/100km+30%299.5 g/km1,779 kg1—
122021 Subaru Wrx13.1 l/100km+30%300.1 g/km1,528 kg15
132021 BMW M2 Competition Coupe12.4 l/100km+23%293.3 g/km1,593 kg——
142021 BMW M312.4 l/100km+23%293.3 g/km1,705 kg3—
152021 BMW M4 Competition Coupe12.4 l/100km+23%292 g/km1,759.9 kg——
162021 BMW M850i xDrive Convertible12.4 l/100km+23%281.5 g/km2,703.4 kg——
172021 Bentley Continental GT12.4 l/100km+23%290.8 g/km2,335 kg3—
182021 Ferrari Roma12.4 l/100km+23%293.3 g/km1,570 kg1—
192021 Lexus RC F12.4 l/100km+23%285.2 g/km1,795 kg1—
202021 Audi RS 511.8 l/100km+17%268.4 g/km1,875.2 kg——
212021 Genesis G70 AWD11.8 l/100km+17%284 g/km1,775 kg4—
222021 Lotus Evora GT11.8 l/100km+17%272.2 g/km1,443 kg——
232021 Acura TLX Type-S11.2 l/100km+11%261 g/km1,911.9 kg——
242021 BMW M240i Convertible11.2 l/100km+11%254.8 g/km2,435.8 kg——
252021 Audi S5 Cabriolet10.7 l/100km+6%244.2 g/km2,039.8 kg3—

Related rankings

Most efficient small cars of 20212020 edition2022 editionSUVs — 2021cars — 2021large cars — 2021midsize cars — 2021pickup trucks — 2021station wagons — 2021two-seaters — 2021

How this ranking works

Values come from FuelEconomy.gov, EPA certification data and NHTSA records shown on each vehicle's page. Only the best-placed version of each model family is listed, so one model cannot fill the list. Electric vehicles are excluded from fuel-consumption rankings and ranked by range instead.

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