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Thanks to top-notch vehicle testing and internationally standardized inspections, the modes of transportation are cleaner and more efficient today. Though the development for conventional internal combustion engine vehicles (ICEVs) has almost saturated today, yet it retains the commercial/heavy-duty (trucks and buses) automobile market. Thus, it becomes of utmost importance to analyze the well-to-wheel efficiency for determining the overall energy consumption and greenhouse gas (GHG) emissions while transitioning toward sustainable transportation. Electric vehicles (EVs) do have environmental impacts that are directly related to the country’s electricity generation, as they may involve fossil burning where other alternative sources of energy are not adequately present. This paper presents the overall energy efficiencies and GHG emissions from commercial/heavy-duty ICEVs and EVs. The study also briefly compares the other vehicle segments like 2 Wheeler, 3 Wheeler, and cars. Finally, the results show that commercial/heavy-duty ICEVs are advantageous over heavy-duty EVs when the GHG emissions are considered as of today. The commercial/heavy-duty ICEVs emit over 405 g CO 2e /km, and counter EVs produce 706 g CO 2e /km. The GHG emissions from 2 Wheeler ICEV were 46 g CO 2e /km and by the same segment, EV is 13 g CO 2e /km. Moving toward the car segment, an ICEV car produces around 158 g CO 2e /km and an EV of a similar model emits 67 g CO 2e /km. Furthermore, the 3 Wheeler ICEV emits around 99 g CO 2e /km and a 3 Wheeler EV produces lesser at 24 g CO 2e /km. Moving further on well-to-wheel energy efficiency, ICEVs have a maximum overall energy efficiency of 28%. Since EVs use various sources of energy for charging the battery, the overall efficiency was found to be at least 21% and maximum up to 39%. Thus, on an average EVs presently have a well-to-wheel efficiency of 32% when electricity generation mix is used for charging.

Well-to-wheel performance of internal combustion engine vehicles and electric vehicles – study for future Indian market