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 4.4-liter V8 of the STS-V that makes 469 horsepower and delivers stunning performance. All STS engines are of aluminum construction, have double overhead camshafts and four valves per cylinder and benefit from variable valve timing to enhance both performance and operating efficiency.Click here to read more