Prius is 5th time winner of ADAC Eco test, which rates cars based on their size, performance compared to their fuel consumption and CO2 emissions. Cars are actually tested at ADAC, with real life case examples (including A/C usage), although they are not driven fast. Test included many of the Bluemotion vehicles that were supposed to get better results than Prius. ADAC EcoTest: Die saubersten Sparautos - Neuwagen - FOCUS Online Many Lexus models were rated well, including LS600h, and RX400h. And not only that, IS220d, which often gets rated bad for fuel consumption by german auto media, scored better than Audi and MB rivals and was only worse than BMW's 4cly model with start/stop (and lot less than official numbers suggest).
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