Best by Class

Starting with the latest model year, these vehicles scored highest in their vehicle class.

Year	Make	Model	Specification	Emission Standard	MPG City	MPG Hwy	Green Score	Class Ranking	Class
2021	Honda	CIVIC 5DR	1.5L 4, auto CVT	LEV-III ULEV125 / Tier 3 Bin 125	31	40	54	Above Average	Large Cars	Details
2021	Tesla	Model S Long Range Plus	Electric (Li-Ion)	Tier 3 Bin 0 / ZEV	3.53	3.35	54	Above Average	Large Cars	Details
2021	Tesla	Model X Performance (20" Wheels)	Electric (Li-Ion)	Tier 3 Bin 0 / ZEV	2.95	2.82	54	Superior	Large SUVs	Details
2021	Honda	CIVIC 4Dr	1.5L 4, auto CVT	LEV-III ULEV125 / Tier 3 Bin 125	30	38	54	Above Average	Midsize Cars	Details
2021	Honda	CIVIC 4Dr	2.0L 4, auto CVT	LEV-III ULEV125 / Tier 3 Bin 125	30	38	54	Above Average	Midsize Cars	Details
2021	Kia	Forte	2.0L 4, auto CVT	LEV-III ULEV70 / Tier 3 Bin 70	29	40	54	Above Average	Midsize Cars	Details
2021	Nissan	SENTRA	2.0L 4, auto CVT	LEV-III SULEV30 / Tier 3 Bin 30	29	39	54	Above Average	Midsize Cars	Details
2021	Ford	MUSTANG MACH-E CALIFORNIA ROUTE1	Electric (Li-Ion)	Tier 3 Bin 0 / ZEV	3.2	2.79	54	Average	Small Wagons	Details
2021	Ford	MUSTANG MACH-E RWD EXTENDED	Electric (Li-Ion)	Tier 3 Bin 0 / ZEV	3.08	2.68	54	Average	Small Wagons	Details
2021	Mini	COOPER CONVERTIBLE	1.5L 3, auto [P]	LEV-III SULEV30 / Tier 3 Bin 30	28	37	54	Above Average	Subcompact Cars	Details
2021	Mini	COOPER HARDTOP 2 DOOR	1.5L 3, auto [P]	LEV-III SULEV30 / Tier 3 Bin 30	28	37	54	Above Average	Subcompact Cars	Details
2021	Mini	COOPER HARDTOP 4 DOOR	1.5L 3, auto [P]	LEV-III SULEV30 / Tier 3 Bin 30	28	37	54	Above Average	Subcompact Cars	Details

Pages

auto cvt

denotes continuously variable automatic transmission.

auto stk

denotes manually adjustable automatic transmission

[CNG]

denotes Compressed Natural Gas

[P]

denotes premium gasoline.

[D]

denotes diesel

Emission Standards:

A listing with two emission standards (e.g., Tier 2 bin 5 / ULEV II) denotes a single vehicle carrying both a federal and California emission certification. Green scores for such listings reflect the cleaner of the two certifications.

Battery-Electric Vehicle Fuel Economy:

Fuel economy for pure battery-electric vehicles is provided in miles per kilowatt-hour.

Plug-in Hybrid Fuel Economy:

Fuel economy for plug-in hybrids is provided in miles per gallon for gasoline operation and in miles per kilowatt-hour for electric operation.

"...It's easy-to-use rating system makes it a snap to see the green from the mean. So enlighten your mind and free your lungs and check out ACEEE's Green Book before you buy."

Motor Week, Maryland Public Television

"For those of you who are more inclined to buy green than you are to drive through it as fuel prices rise, I can recommend no better resource than ACEEE's Green Book...[It] offers solid, practical, well-researched, balanced advice."

Warren Brown, Washington Post

Search form

Banner

Best by Class

Pages