According to Cars.com “The top trim engine is a new twin-turbocharged version of the 3.6-liter V-6, making a hefty 420 hp and 430 pounds-feet of torque. For both V-6 models, rear-wheel-drive versions come with a new eight-speed automatic transmission, while the all-wheel-drive non-turbo V-6 comes with the six-speed (the twin-turbo V-6 is not available with all-wheel drive).
The twin-turbo engine comes with a new trim level. The V-Sport is meant to bridge the gap between the 321-hp, 3.6-liter V-6 and the fire-breathing 556-hp, supercharged V-8 CTS-V. The Vsport will feature 18-inch wheels, a quicker steering ratio, Brembo brakes front and rear, a Track mode for the transmission, a heavy-duty cooling system, an electronic limited slip differential and Cadillac’s Magnetic Ride Control active suspension.”
It seems that GM is taking a page from Ford and its EcoBoost lineup. With engine management and direct injection being de rigueur, why not bolt on some boost?