2009 European VW Diesel-Hybrid - 69 mpg US.

Volkswagen is to unveil a diesel-electric hybrid Golf capable of returning an astonishing 83.1mpg and emitting just 89g/km of carbon dioxide. This isn't Volkswagen's first hybrid: it experimented with a trial petrol-electric fleet in the early 90s and it has been developing diesel-electric units for some years (one took part in the 2004 Challenge Bibendum eco-car rally in Shanghai).