The Saturn Ion is a stylish compact with innovative features. The base engine for the Ion is a 2.2-liter four-cylinder rated at 140 horsepower. Saturn has reconfigured the center dash to provide more room for storage and to enhance legroom. OnStar is now standard on all Ions. The sedan offers plenty of interior and luggage room . The Saturn Ion is a lot of fun on a winding road. Safety features include dual-stage driver and front-passenger frontal airbags. New for 2006 is a Passenger Sensing System that switches off the right front airbag if the right front seat is unoccupied, or occupied by a small adult or child .