Context: I sell cars and currently have a Nissan Leaf. A customer had asked if I knew why it had 121city/91highway MPG listed if it was a fully electric vehicle. This confused me too and it’s apparently a common thing? Thanks.
In: 7
Its a measure of efficiency to allow people to compare the energy consumption, they’re rated in MPGe (Miles Per Gallon equivalent)
Why list it as Miles per Gallon instead of kWh/mile or miles/kWh? Because they did some surveying and determined people don’t know what a kWh means in terms of their car and found MPG less confusing and consistent with the existing markings
121/91 MPGe city means the Leaf used 0.278 kWh/mile on the city driving test and 0.370 kWh/mile on the highway test
It doesn’t directly compare to the costs/CO2 emissions of a gasoline powered vehicle because it doesn’t deal with the upstream power generator efficiency but its a start and allows for comparisons of efficiency between electric cars beyond just the stated range which is heavily influenced by overall battery capacity
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