"Wait. There must be some mistake. How can an autobahn-inspired performance machine beat one of the most fuel-efficient cars ever made?
It looks like that is exactly what happened on a 545-mile London-Geneva run, when a diesel-powered BMW 5-series posted better MPG stats than a petrol-based Toyota Prius hybrid. The BMW 520d with a 2.0-liter diesel engine and regenerative braking posted an impressive 41.9 mpg - about 0.9 mpg better than a full hybrid Prius. The difference may not seem huge. But given that the Prius weighs about 500 lb less, BMW's fuel economy lead was significant enough to raise new questions about which drivetrain technologies are more environmentally viable and should become the future mainstream of sustainable transport.
According to our partner site Technoride, the 5-series' triumph over Prius can be attributed to "a series of energy-saving features BMW calls EfficientDynamics: battery recharge when braking, good aerodynamics, low rolling resistance, a continuous fuel consumption gauge on the dashboard, and a six-speed manual transmission that is rated as improving fuel economy by about 10%."
Story:
http://www.goodcleantech.com/2008/03/bmw_beats_prius_in_mpgs.php
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