Greenest

Model Year 2018

Make and model Specifications Emission standarda MPG cityb,c MPG hwyb,c Green Score
Hyundai Ioniq Electric Electric (Li-Ion) Tier 3 Bin 0 / ZEV 4.7 3.8 70
Mercedes-Benz Smart Fortwo Electric Drive Coupe1 Electric (Li-Ion) Tier 3 Bin 0 / ZEV 3.8 2.9 69
BMW i3 BEV (94 Ah)2 Electric (Li-Ion) Tier 3 Bin 0 / ZEV 3.8 3.2 68
Tesla Model 3 Long Range Electric (Li-Ion) Tier 3 Bin 0 / ZEV 4.1 3.7 67
Kia Soul Electric Electric (Li-Ion) Tier 3 Bin 0 / ZEV 3.7 2.8 66
Chevrolet Bolt EV Electric (Li-Ion) Tier 3 Bin 0 / ZEV 3.8 3.3 66
Hyundai Ioniq Blue3 1.6L 4, auto LEV-III SULEV30 / Tier 3 Bin 30 57 59 65
Toyota Prius Eco 1.8L 4, auto CVT LEV-III SULEV30 / Tier 3 Bin 30 58 53 64
Ford Focus Electric Electric (Li-Ion) Tier 3 Bin 0 / ZEV 3.5 2.8 64
Kia Niro Plug-in Hybrid Electric (Li-Ion) / 1.6L 4, auto LEV-III SULEV30 / Tier 3 Bin 30 3.34 / 48 2.95 / 44 63
Honda Clarity Plug-in Hybrid Electric (Li-Ion) / 1.5L 4, auto CVT LEV-III SULEV20 / Tier 3 Bin 20 3.49 / 44 3.04 / 40 62
Chevrolet Volt Electric (Li-Ion) / 1.5L 4, auto CVT LEV-III SULEV30 / Tier 3 Bin 30 3.40 / 43 2.96 / 42 62

[P] Denotes Premium Gasoline. 
"Auto CVT" denotes continuously variable automatic transmission.
a A listing with two emission standards (e.g., LEV II SULEV / Tier 2 Bin 3) denotes a single vehicle carrying both a federal and a California emission certification. Green Scores for such listings reflect the cleaner of the two certifications.
b Fuel economy for electric vehicles is provided in miles per kiloWatt-hour.
c Fuel economy for plug-in hybrids is provided in miles per gallon for gasoline operation and in miles per kiloWatt-hour for electric operation
1. The Smart Fortwo Electric Drive Convertible earns a score of 67
2. The i3s earns a score of 67, and the i3 REx and i3s REx each earn a score of 63
3. The Hyundai Ioniq Plug-in Hybrid also earns a score of 65, while the Hyundai Ioniq hybrid earns a score of 63