Cadillac has reiterated its stance that the twin-turbocharged 4.2-liter LTA V8 engine from the CT6-V will not find its way into the Corvette C8 or any other vehicle that does not have a Cadillac badge.
Speaking to Road & Track, Cadillac brand boss Steve Carlisle explained the twin-turbo V8 was developed in-house by Cadillac and that it would remain exclusive to the luxury brand. The first time he was asked if the car would find its way into anything else under the GM brand umbrella, Carlisle said “over my dead body.”
“When it comes to powertrains and propulsion, that’s a heart and soul kind of thing. It’s the DNA of a car,” Carlisle told R&T. “From a Cadillac perspective, there are certain things that need to be exclusive to Cadillac.”
The Corvette C8 will receive a twin-turbocharged DOHC V8, but it won’t be called the LTA. Instead, it will be called the LT7, as we exclusively reported earlier this year. Compared to the LTA, the LT7 will have a larger cylinder displacement and, of course, more power. Our sources indicate it will have more than 650 horsepower on tap, making it more powerful than the supercharged 6.2-liter LT4 V8 in the C7 Corvette Z06.
Another major difference between the LT7 and the LTA is the placement of the turbochargers. Whereas the LTA uses a ‘hot-vee’ design that places the turbochargers within the cylinder banks, the LT7 has its turbos mounted on either side, below the cylinder banks.
So while the overall, DOHC V8 engine architecture of the LTA and LT7 will be the same, there are many differences between these motors that tailor each to a specific purpose and give it a unique character. This approach allows GM to continue sharing parts between its brands while keeping Cadillac engines in their own, neatly polished corner.