According to the top man at Cadillac, Johan de Nysschen, the new CT6 sedan will come in many flavors starting with a turbo 4 banger all the way up to a range topping Twin Turbo V8. He answered some questions over on Jalopnik today and confirmed that the vehicle will eventually get get the Turbo eight.
My prediction is that this new V8 will be based on the concept they previewed with the Elmiraj where they previewed a Twin Turbo 4.5L V8 that makes 500 hp and 500 lb-ft. This may be the start of an all new V8 platform for GM as the only boosted V8’s right now are supercharged.