The STS models benefit from GM's newest V6 and V8 engines, which boast the latest in computerized engine management and variable valve timing. The result is smooth, efficient power. The STS also offers a choice of equally smooth suspensions, from the standard suspension designed for smooth, comfortable commuting to an active suspension that instantly adjusts to any driving situation, whether cruising through a sea of potholes or swiftly motoring around a sweeping turn.

What really sets this latest generation of luxury models apart, however, is that the STS has returned to rear-wheel drive, an essential element for truly spirited driving. All-wheel drive is also available for handling stability in inclement weather.