The Cadillac twin-turbo 3.6L V-6 headlines the XTS’ powertrain lineup and is standard on the V-Sport model, delivering SAE-certified 410 horsepower (306 kW) and 369 lb-ft of torque (500 Nm), making it one of the most power-dense six-cylinder engines in the segment. A pair of turbochargers and an efficient charge air cooler help provide more immediate power delivery, while peak torque is sustained over a broad range — 1,900 to 5,600 rpm — for a confident feeling of power when accelerating or overtaking traffic.
The XTS’ standard 3.6L V-6 is rated at 304 horsepower (227 kW) and 264 lb-ft of torque (355 Nm). Lightweight features help reduce overall weight for greater efficiency and a more favorable front-to-rear weight balance. Examples include a composite intake manifold that saves approximately 5.5 pounds (2.5 kg) over the weight of a comparable aluminum intake and an integrated cylinder head/exhaust manifold design that saves approximately 13 pounds (6 kg) per engine.
The engines are matched with six-speed automatic transmissions and tap-shift control.