Rating "Efficiency"
Our summary score for energy or fuel consumption per kilometre; based on WLTP and real-world consumption.
The efficiency rating gives a summary figure for the energy use of a model per kilometre. We place the WLTP statement next to the real-world picture from owner reports and weigh both. For combustion engines we work with litres or kilos of fuel per 100 km; for electric cars with kWh per 100 km. We avoid a mixed figure across drivetrains, because the units are not one-to-one comparable.
The figure is not a price comparison. We do not compute fuel or electricity costs and make no statement about what is advantageous for you; that depends on your driving behaviour, contract and reference date. On plug-in hybrids (PHEV) we separately name the utility-factor assumption, because on that drivetrain the WLTP statement contains an assumption about charging behaviour that makes individual deviations large.
The rating is a reference figure with methodology and reference date on the methodology page. Combine it with the individual consumption and range figures and with your expected usage pattern to weigh it up yourself.
See also: WLTP, Real-world consumption, Utility factor, Range, Rating "Sustainability"
Source: Own summary rating from WLTP and owner-reported real-world consumption; reference date 2026-05-21
No tax or financial advice. Every figure shows its source and reference date. Always compare with an independent adviser and the official source.