According to Angus MacKenzie of Wheels Magazine, this engine “is closely related to the Blackwing” although it couldn’t be more different. Cadillac developed the 4.2-liter V8 independently from the peeps in charge of the LT6, and the hot-vee setup won’t carry over to the Corvette ZR1.
Angus does have a point about “the world’s most powerful naturally aspirated V8” because the 5.5-liter engine is rumored to belt out 460 kW. That converts to 617 horsepower in the United States of America and 625 horsepower where the metric system is preferred, figures that eclipse the most powerful naturally aspirated V8 offered in a road-going Ford vehicle.
I’m referring to the 5.2-liter Voodoo in the Shelby GT350, an engineering marvel with 526 horsepower on tap. The rumored output would also eclipse the Ferrari 458 Speciale and Mercedes-Benz SLS AMG, and it's definitely impressive for a Chevy with the motor located behind the driver.
Angus also throws around estimates for the hybrid E-Ray, twin-turbo ZR1, and hybrid twin-turbo Zora, which are supposed to follow the Z06 in 2023, 2024, and 2025 if the Bowling Green plant in Kentucky doesn’t face unexpected shutdowns over microchips and all that jazz. Oh, and by the way, the Z06 promises to handle much, much better than the Stingray thanks to 345/25 by 21-inch Michelin Pilot Sport Cup 2 R steamrollers at the rear end.