20. Volkswagen Golf TDI
The Volkswagen Golf TDI showed how diesel power could deliver both hatchback practicality and outstanding fuel economy in 2005. With EPA ratings of 37 mpg city / 44 mpg highway, it rivaled other diesels for efficiency while offering ample cargo space and European flair. Compared to the Jetta TDI, the Golf’s compact size and versatility made it a favorite among efficiency-minded drivers. Find official fuel economy data at the EPA website.