General Motors this week announced another tidbit about their upcoming Cadillac CT6 flagship sedan, an all new generation of high-feature V6 engines.

The top rung of this new engine architecture is a 3.0 liter twin turbo which will produce a robust and refined 400 horsepower and 400 lb-ft of torque. This makes it Cadillac says one of the most power-dense V6 engines in the world

To produce all its power and also be efficient, it will boast turbocharging, cylinder deactivation which enables four-cylinder operation on light loads and auto stop/start technologies.

In the 2016 Cadillac CT6, the engine will be mated to GM’s Hydra-Matic 8L90 eight-speed automatic transmission.

Cadillac says the all-new engine gets turbochargers with lightweight, low-inertia titanium-aluminide turbines and low-volume inter-cooler similar to the ATS-V, which contributes to more immediate power delivery.

These low-inertia turbochargers enable peak torque to come between 2,500 rpm to 5,000 rpm, right in the sweet spot for most street and highway driving conditions.

The new engine family will also include a new 3.6 liter naturally aspirated version. Both will be produced at GM’s Romulus Powertrain Operations plant just outside Detroit.

The new flagship Cadillac CT6 and its twin-turbocharged V6 will be unveiled next week at the New York Auto Show.