* The electric vehicle consumption figure is expected to remain constant over time, and refers to the consumption of BEVs or PHEVs in the electric-only mode. Currently, electric vehicles are already extremely efficient vehicles. In fact, the electric engine is already highly efficient (over 90%), so it is unlikely to improve significantly over time. The consumption largely depends on the vehicle’s weight and aerodynamic coefficient:
1. The aerodynamic drag is already contained via very high levels of efficiency, with Cx = 0.28 for C-segment cars, largely thanks to design considerations aimed at increasing the range and quietness of the vehicles, as well as a number of inherent advantages (e.g., a flat underside due to there being no central exhaust system).
2. The weight is already low, thanks to design considerations aimed at increasing the vehicle’s range. The engines are already very light and powerful (there’s no reason to increase the power further, 150 hp for a hatchback has already been achieved), so the only element that could be optimized is the battery (its specific weight). The trend is to increase capacity while keeping the size the same.