GM has confirmed that its upcoming 2014 CTS sedan, due at his month's New York Auto Show, will debut with a twin-turbo 3.6 litre V6 engine.
Based on the company's existing naturally-aspirated 3.6 V6, the new turbo mill utilise two small turbochargers and a host of new components to produce a hefty 313kW and 583Nm of torque.
Breaking it down, that's 87kW per litre - and GM is all-too-happy to remind buyers of how those figures compare to the 3.0 litre turbo six in the 535i (74kW/litre) and the 4.4 twin-turbo V8 in the 550i (68kW/litre).
Combined with an eight-speed automatic transmission, GM says the engine will propel the CTS sedan to 100km/h in 4.6 seconds.
Among the enhanced engine's modifications are new cylinder block and head castings, strengthened connecting rods, machined and doned aluminium pistons with top steel ring carriers, and a 10.2:1 compression ratio.
There's also direct injection and vacuum-actuated wastegates, and GM says the two turbocharges produce "more than" 12 pounds of boost (80kPa).
At the lower end of the scale, the new CTS will also be offered with a 2.0 litre turbocharged four-cyliner engine producing 203kW.
Where it would sit in the line-up is another question, however. While Ford long ago dropped its V8-powered Falcon XR8, Holden intends to stick with naturally-aspirated power, keeping the SS with GM's 6.0 litre V8.
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