 Vehicles in both classes must have a fuel economy of 100 MPGe (21 kWh or 2.35 liters of petrol/100 kilometer) and produce less than 200 grams/mile CO2 emissions (measured well-to-wheel).For electric vehicles, the CO2 emissions requirement is a more binding constraint.Because CO2 emissions will be calculated assuming a national average of electricity sources projected to 2014, an all-electric car will have to achieve 114 MPGe in order to produce less than 200 grams/mile CO2 emissions.