11. Volkswagen Passat TDI

The Volkswagen Passat TDI sports understated, businesslike styling that rarely turns heads. However, its diesel engine transforms the experience, offering torque-rich performance and stellar highway fuel economy.
Long-distance drivers especially appreciate its stable ride and efficient cruising ability.
As Autoblog notes, the Passat TDI stands out as a sleeper sedan, delivering an engaging drive beneath its modest appearance.