Detailed item info Model OverviewThe 2007 Saturn Ion sedan and Quad Coupe can be had either in basic Ion 2 and convenience-oriented Ion 3 trim. but the high-performance Red Line model is only available as a Quad Coupe. Both Ion 2 and Ion 3 models have a standard 145-horsepower. 2. 2L "Ecotec" engine; a 175-horsepower. 2. 4L Ecotec four-cylinder. with variable valve timing (VVT). is optional. Both engines have counter-rotating balance shafts and direct accessory mounting for smooth operation. With either engine. a five-speed manual transmission is standard and a four-speed automatic is optional. At the top of the Ion range is the high-performance Red Line model. It brings a 2. 0L supercharged four-cylinder engine making 205 horsepower. along with a heavy-duty five-speed manual gearbox. short-throw shifter. a limited-slip differential. 17-inch gunmetal-finish forged wheels with Z-rated tires. projector-beam fog lamps. equal-length drive shafts. and a lowered sport suspension. Leather seats are also standard. The Red Line can accelerate to 60 mph in only 6. 2 seconds. according to GM. On Ion 2 and Ion 3 models. an available Enhanced Performance Package brings thicker stabilizer bars. and a stiffer overall suspension for more nimble handling. There's also a leather trim package available on the Ion 3 that adds leather upholstery and a leather-wrapped steering wheel and shift knob. Head-curtain side air bags. which protect front and rear occupants. are optional across the line. Anti-lock brakes are optional on Ion 2 and Ion 3 models but standard on the Red Line. Sound systems range from the four-speaker CD deck that's standard on the Ion 2 up to an optional Saturn Advanced Audio System. which includes a 160-watt amp and six speakers. All sound systems include an auxiliary input jack.