Q:  Why would you buy a Prius? A:  Fuel economy. Q:  So why would you buy a Prius? The Jetta TDI beats Prius in Popular Mechanic’s testing, sets a Guiness world record for fuel efficiency, and has superior handling and performance (see video below).  http://www.mnn.com/transportation/cars/blogs/new-guinness-fuel-economy-record-an-amazing-679-mpgin-a-jetta http://www.popularmechanics.com/automotive/new_cars/4284188.html