What's New for 2007: The higher-powered Solstice GXP expands the lineup to two models, introducing a high-tech turbocharged engine that increases power nearly 50 percent over the base engine. The GXP also sports more features and additional performance and safety hardware. Both models now include power height adjustment for the driver's seat.

The Solstice ($21,515) is powered by a 177-hp, 2.4-liter four-cylinder engine with a standard five-speed manual transmission. It comes standard with hand-cranked windows, manually adjusted outside mirrors and manual door locks. Its AM/FM stereo has six speakers, a CD and an auxiliary jack for MP3 players and other audio devices. The glass rear window has a defogger, and the urethane-clad steering wheel has a tilt adjustment. The shift knob wears leather, but seats and door panels are covered in cloth. The Convenience Package ($465) adds cruise control, an information center, and fog lamps. The Preferred Package ($625) includes power windows, door locks and body-colored outside mirrors. Together, these two packages bring the base Solstice up to snuff with the GXP, minus the cool engine.

The Solstice GXP ($26,515) gets a turbocharged 2.0-liter four-cylinder engine generating 260 horsepower and 260 pound-feet of torque, matched to a five-speed manual transmission. The GXP comes with more standard safety features, including ABS, GM's Stabilitrak skid-management system and a limited-slip differential. The GXP also gets power windows and mirrors, cruise control, remote keyless entry, fog lamps and polished aluminum wheels.

A five-speed automatic transmission ($875) and air conditioning ($969) are optional on both models.

Leather upholstery is available for both the base model ($690) and GXP ($525) as part of the Premium Package.

Audio upgrades include a CD that can play MP3 coded discs ($195), as opposed to a plug-in MP3 player (that capability is standard). Next up is a high-watt Monsoon system with subwoofer ($395), which requires the MP3 upgrade. There also is an in-dash six-CD changer ($495), which includes the MP3 capability. Both Solstice models also offer XM Satellite Radio ($199) with a three-month trial subscription. Other options include OnStar Safe & Sound ($695) with a one-year subscription, polished wheels for the base model ($545), chrome wheels, sport metallic pedals ($150), floor mats ($60) and a smoker package with lighter and ash tray ($40).

The base Solstice can be ordered with the limited-slip rear differential ($195) and a rock-hard suspension ($1,095) for club racing.

The Solstice is equipped with the minimum passive safety features required by federal regulation, which means seat belts and dual front airbags. Anti-lock brakes ($400) and Stabilitrak ($485) are optional on the base model.