Roughly a year ago, Cadillac President, Johan de Nysschen, revealed that the sport-luxury brand will introduce a twin-turbo V8 engine some time in the future. Outside of that confirmation, however, details have been scarce. Until now.
Car and Driver picked de Nysschen’s brain, who revealed the first basic details on what to expect from the upcoming Cadillac Turbo V8. Foremost, it will displace 4.2 liters and be paired to two turbochargers. Though it will be a mighty 4.2-liter twin-turbo V8, de Nysschen clarified that all-out performance will not be the goal for the powerplant. In fact, the motor is not even being considered a V-series engine.
The other big detail is that the upcoming Cadillac 4.2-liter V8 will share nothing with General Motors’ current family of small-block engines. More specifically, it will in no way be related to the LT4 V8 found in the 2016 Cadillac CTS-V, making it the first V8 motor exclusive to Cadillac since the Northstar V8, which was discontinued in 2010. As such, it sounds like the new motor will, in fact, be a dual-overhead cam (DOHC) setup rather than the push-rod layout of the LT4.
When Cadillac’s new 4.2-liter V8 launches, it will first be found under the hood of the Cadillac CT6, likely in the Platinum or CT6 V-Sport models wearing a 4.2TT badge, with de Nysschen noting that a true CT6-V might not be in the cards. We’ll speculate that power figures will likely stretch well beyond 400 horsepower, as the new twin-turbo LGW V6 delivers that much punch from 3.0 liters of displacement and six cylinders. As such, Caddy’s new 4.2-liter turbo V8 will likely be rated closer to the 500 horsepower mark, with de Nysschen saying that power will likely be “in the upper 400s”. Those ponies will most likely be sent through GM’s familiar eight-speed automatic 8L90 or upcoming all-new ten-speed auto, though a more advanced dual-clutch gearbox could be possible.