Models are ordered by purchase price. Base model specs are displayed for each model. Purchase price of future models are based on best estimates available and may vary between states due to variations in local taxes and fees. Efficiency is measured in watt-hours per km (Wh/km). This represents how much electricity a vehicle uses to travel one kilometre. WLTP is the Worldwide Harmonised Light Vehicle Test Procedure. It is a laboratory test used to measure fuel consumption and vehicle emissions.