The 2008 Cadillac XLR gets revised suspension tuning and a new Platinum Edition option package. This two-seat sporty car is based on the Chevrolet Corvette, but XLR has unique styling, a power-folding hardtop, and different powertrains. Base models have a 320-hp 4.6-liter V8 engine. High-performance XLR-V versions have a supercharged, 443-hp 4.4-liter V8. A 6-speed automatic transmission is standard on both. Available safety features include ABS, traction control, antiskid system, and front side airbags that protect the head and torso. Run-flat tires are standard, as is GM's automatic adjusting Magnetic Ride Control suspension. All models get a revised version of Magnetic Ride Control designed to improve ride and handling response. The new Platinum Edition option package for base models includes unique interior and exterior trim. We have not yet tested the 2008 Cadillac XLR.