Saturn Ion Red Lines feature a gas-powered 2.0 liter 16-valve inline-four engine with a double overhead cam, a 5-speed manual transmission and front-wheel drive. Red Lines feature a three-year, 36,000 mile warranty covering basic elements, with additional elements covered for periods that vary by the year model.
Red Lines include a MacPherson strut front independent suspension and a torsion beam rear suspension, with some models featuring a front and rear stabilizer bar. The suspension has been notably firmed on later year models.
Interior features include power door locks, power mirrors, power steering, an AM/FM stereo and four speakers. Some year models include speed-sensitive wipers, performance tires, alloy wheels, split-folding rear seatbacks, remote keyless power door locks, OnStar telecommunications service, or a hands-free phone. XM satellite radio is available as an optional feature on some later models. A rear spoiler is available as an option, but it has been criticized for blocking the driver's rear view.
Some year models feature a remote anti-theft alarm system, front and rear solid disc brakes, electronic brakeforce distribution and an engine immobilizer system. Depending on the year model, Red Lines feature a 13- to 13.2-gallon gas tank, with an EPA-estimated gas mileage of 20 to 23 MPG in the city and 26 to 32 MPG on the highway.