volkswagen

The latest concept incarnation of Volkswagen's Golf TDI achieves an impressive 62 mpg. In addition, carbon dioxide emissions are limited to just 99 g/km, less than a Toyota Prius. The vehicle will likely be sold in the UK starting in the middle of 2009. This level of efficiency is achieved with a 1.6-liter TDI diesel engine.

The engine generates 105 horsepower and brings the car from 0 to 60 in 11 seconds. In addition to the smaller engine, mileage in this model has been increased with changes to the transmission, low rolling resistance tires, and improved aerodynamics.