4. Volkswagen Jetta TDI
The Volkswagen Jetta TDI showcased the efficiency of diesel technology in 2005. With an EPA estimate of 36 mpg city / 47 mpg highway, this sedan stood out for its impressive range and robust European engineering. Compared to its gasoline siblings, the TDI offered more torque and significantly better fuel economy, appealing to both commuters and road-trippers. For a closer look at its performance, check out the Car and Driver review.