The XLR is a luxury sports car sold by Cadillac and is assembled in Bowling Green, Kentucky. It is based on the same Y-body platform as the Chevrolet Corvette. The XLR uses the Cadillac Northstar engine rather than the GM LS2 engine found in the Corvette. The XLR also has its own unique styling, interior, and suspension, and has a power-retractable aluminum hardtop. The engine is Cadillac's 4.6 L Northstar tuned for 320 hp, and operates with a 5-speed automatic transmission. (edit this text)