Cadillac brings several significant mechanical upgrades with the 2008 STS, starting with a 3.6-liter V6 engine/six-speed automatic standard powertrain that rates 298 horsepower and 268 lb.-ft. of torque. That's a 40 horsepower boost over the 2007 model and slightly more torque – the existing standard powertrain is rated at 252 lb.-ft. Other improvements include significant safety advances such as an updated version of GM's StabiliTrak stability control system, a lane departure warning system, blind spot monitoring system and more.