The Cadillac STS represents an American challenge to the technology, quality and great driving attributes of the high-end imports. Available with rear-wheel or all-wheel drive, with engines ranging from a responsive and efficient V6 to a supercharged V8, the STS delivers a lot of luxury, technology and performance with a wide range of drivetrain and powerplant choices. The 3.6-liter direct-injection V6, developing 302 horsepower and matched with a six-speed automatic transmission, is standard equipment. There is also a 4.6-liter V8 with 320 horsepower and, at the top, the supercharged…
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