joule of gasoline, diesel, or electricity) and energy consumption per unit of travel (joules per 100 km), which captures the relative energy efficiency of BEVs versus ICEVs. Fossil fuels require converting electricity because of heat loss (USDOE 2024b). This report estimates energy efficiency for different each vehicle segment in 2024, averaged across 40 countries. BEVs show a substantial energy efficiency advantage over ICEVs in all vehicle segments. For two-wheelers, BEVs require 13.1 megajoules (MJ) per 100 km of travel, compared with 78.5 MJ per 100 km for ICE two-wheelers—roughly six times more efficient on α per-kilometer basis. For cars, BEVs average 60.9 MJ per 100 km, more than four times more efficient than their ICE counterparts.