With all-wheel drive, the STS makes a surprisingly good all-weather car despite its performance edge, and with the new front-wheel steer system the AWD V8 model promises to be especially nimble.

With all-wheel drive, the STS makes a surprisingly good all-weather car, and with its front-wheel steer system, the AWD V8 model is especially safe and nimble. Inside, the STS has a look and feel that ...