A little bigger than most compact sedans, the Jetta is a roomy, comfortable, and practical choice. The 1.8-liter turbo four-cylinder is smooth and flexible, and returns an excellent 30 mpg. New for 2016 is a refined and energetic 1.4-liter turbocharged four-cylinder. It got 32 mpg overall in our testing. The GLI gets a strong turbo 2.0-liter, a sportier suspension, better brakes, and a richer-feeling interior. The Hybrid gets 37 mpg overall. Its 1.4-liter turbo engine, electric motor, and seven-speed automated manual work seamlessly. Revisions to the steering and suspension have given the Jetta improved agility and a steady ride. The diesel version is under investigation by the EPA for not complying with emissions regulations.