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	Jeep	Compass	2.4L 4, auto	LEV-III ULEV50 / Tier 3 Bin 50	22	31	47	Average	Compact SUVs	Details
2021	Kia	Sorento	2.5L 4, auto stk	LEV-III ULEV70 / Tier 3 Bin 70	24	29	47	Average	Compact SUVs	Details
2021	Kia	Sportage	2.4L 4, auto stk	LEV-III ULEV70 / Tier 3 Bin 70	23	30	47	Average	Compact SUVs	Details
2021	Mitsubishi	Outlander Sport 2WD	2.4L 4, auto CVT	LEV-III ULEV70 / Tier 3 Bin 70	24	29	47	Average	Compact SUVs	Details
2021	Volvo	XC40 FWD	2.0L 4, auto stk	LEV-III ULEV70 / Tier 3 Bin 70	23	32	47	Average	Compact SUVs	Details
2021	BMW	X1 xDrive28i	2.0L 4, auto stk Awd [P]	LEV-III SULEV30 / Tier 3 Bin 30	23	31	47	Average	Large Cars	Details
2021	Subaru	LEGACY	2.4L 4, auto CVT Awd	LEV-III ULEV125 / Tier 3 Bin 125	24	32	47	Average	Large Cars	Details
2021	Mercedes-Benz	GLB 250	2.0L 4, auto [P]	LEV-III ULEV70 / Tier 3 Bin 70	23	31	47	Above Average	Large Vans	Details
2021	Alfa Romeo	Giulia	2.0L 4, auto [P]	LEV-III ULEV125 / Tier 3 Bin 125	24	33	47	Average	Midsize Cars	Details
2021	Audi	A5 Sportback S line quattro	2.0L 4, auto Awd [P]	LEV-III ULEV70 / Tier 3 Bin 70	24	31	47	Average	Midsize Cars	Details
2021	BMW	540i	3.0L 6, auto stk [P]	LEV-III ULEV70 / Tier 3 Bin 70	25	32	47	Average	Midsize Cars	Details
2021	Cadillac	CT5	2.0L 4, auto stk [P]	LEV-III ULEV50 / Tier 3 Bin 50	23	32	47	Average	Midsize Cars	Details

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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.

"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

"...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

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