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
2020	Hyundai	Ioniq Blue	1.6L 4, auto	Tier 3 Bin 30	57	59	66	Superior	Midsize Cars	Details
2020	Toyota	PRIUS PRIME	Electric (Li-Ion) / 1.8L 4, auto CVT	LEV-III SULEV30 / Tier 3 Bin 30	4.26 / 55	3.58 / 54	66	Superior	Midsize Cars	Details
2020	Hyundai	Ioniq Electric	Electric (Li-Ion)	Tier 3 Bin 0 / ZEV	4.29	3.58	65	Superior	Midsize Cars	Details
2020	Toyota	PRIUS Eco	1.8L 4, auto CVT	LEV-III SULEV30 / Tier 3 Bin 30	58	53	65	Superior	Midsize Cars	Details
2020	Honda	INSIGHT	1.5L 4, auto CVT	LEV-III SULEV30 / Tier 3 Bin 30	55	49	64	Superior	Midsize Cars	Details
2020	Hyundai	Ioniq Plug-in Hybrid	Electric (Li-Ion) / 1.6L 4, auto	Tier 3 Bin 30	3.65 / 53	3.37 / 52	64	Superior	Midsize Cars	Details
2020	BMW	i3	Electric (Li-Ion)	Tier 3 Bin 0	3.69	3.02	63	Superior	Compact Cars	Details
2020	Toyota	COROLLA HYBRID	1.8L 4, auto CVT	LEV-III SULEV30 / Tier 3 Bin 30	54	54	63	Superior	Compact Cars	Details
2020	Hyundai	Ioniq	1.6L 4, auto	Tier 3 Bin 30	55	54	63	Superior	Midsize Cars	Details
2020	Toyota	CAMRY HYBRID LE	2.5L 4, auto CVT	LEV-III SULEV30 / Tier 3 Bin 30	51	53	63	Superior	Midsize Cars	Details
2020	Toyota	PRIUS	1.8L 4, auto CVT	LEV-III SULEV30 / Tier 3 Bin 30	54	50	63	Superior	Midsize Cars	Details
2020	Mini	COOPER SE HARDTOP 2 DOOR	Electric (Li-Ion)	Tier 3 Bin 0	3.41	2.97	63	Superior	Subcompact 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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