General Motors Cadillac STS-V The 2006 STS-V to make Japan debut is a rear-wheel drive model that epitomizes Cadillac power and performance. The 4.4-liter supercharged Northstar V-8 engine is mated to the all-new Hydra-Matic 6L80 six-speed automatic transmission, resulting in an under-5-second club for 0-60 mph time. Careful calibration of the engine and transmission enables refined shift feel. In addition, it carries the craftsmanship and sophistication of its base model STS, featuring elegant design statement that is unmistakably Cadillac.