Cadillac President Johan de Nysschen explicitly told media here at the 2018 New York International Auto Show that the brand’s new 4.2-liter twin-turbo LTA V8 engine is not bound for any Corvette. The executive aimed to squash any rumors that have circulated since the engine’s reveal last week with the 2019 Cadillac CT6 V-Sport.
The engine produces 550 horsepower and 627 pound-feet of torque in the V-Sport, though a 500-hp version will be optional in other Cadillac models.
de Nysschen said the engine focuses more on refinement and luxury, while the Corvette “wants a different kind of character.”
The idea behind Cadillac’s 4.2-liter twin-turbo V8 heading to the mid-engine C8 Corvette really gained momentum after a leaked IHS Markit report described a seemingly identical engine in the pipeline for the C8 Corvette. The report also mentioned the current 6.2-liter LT1 V8 engine and a 5.5-liter twin-turbo V8 engine.

Photo: Josh Busenbark via “Woodward” Facebook group.
Cadillac also threw fuel on the fire when it disclosed its new V8 engine would be built in Bowling Green, Kentucky, and General Motors’ Performance Build Center—the home of all things Corvette.
Still, de Nysschen may simply have shut down rumors for this specific engine. Engineers could certainly have a relative engine based on the LTA architecture in the works. We’ll simply have to wait and see.
Comments
Chevy will have their own DOHC engine at some point. They will need it for emissions. I expect they will do a cheaper engine for their use as they need to use it in trucks and other lower priced models.
I thought at best the block may be shared but everything else was up for change.
You throw different turbos on it and you have a different internal engine code. Just like they’ve done with the 6.2 and different super chargers.
Indeed. It’s all semantics.
Not so much the turbos as it is the displacement which allows them say exclusively for Cadillac.
I’m good with this, people have been dissecting Cadillac details for years for not having enough brand exclusives. It’s one more differentiation that can help it be a better comparison with the Germans.
My point exactly! The more brand exclusivity, the better!
While this is cool. I would really love to see four variants of v8 camaro with the new Dohc setup just in N/A form. An SS350 (5.7l) Dohc pumping out 485hp, an SS396 (6.5l) pushing out 550hp, a track focused Z/28 with a 530hp flat plane crank 302(5.0l) and a 800hp 427ci (7.0l) zl1. With the Dohc setup being able to be tuned for massive amounts of power with greater efficiency although these engines sound like they’d be horrendous you have a smaller displacement 5.7 putting out as much as a 6.2l LT1 and with direct and port fuel injection, variable valve timing and cylinder deactivation along with 10sp automatics the fuel mileage wouldn’t be that bad. The second engine being the 6.5l Dohc v8. Dodge already has a 6.4l so this engine really isn’t that far of a stretch and gm has a 6.2l but take an engine roughly the same displacement size and make it a Dohc variant and add efficiency to the performance and you still come out with a better Mpg rating. The 5.7l would need to be right around 28-32 highway while the 396 should be around 26-29. Now of course the 7liter ZL1 is going to be a bear with fuel economy not being a major focus but if they can make 7.0l get 23mpg on the highway then that would be a win. The z28 needs to follow the gt350 but be a car that has better street manners and a full interior.
It would also be nice to see the full 1LE pkg be dedicated to a 410hp twin turbo v6 camaro RS and turn the four cylinder camaro into a 350hp berlinetta focused on Buick level comfort and 35mpg fuel economy
410-465-HP Twin-Turbo V6… Yes! Buick level comfort for the turbo-4 …nope. Maybe for the current V6.
What we need is a 325-HP 1LE Turbo-4. and a 500-HP SS Git’r done GM.
Words are very subjective…The Vette could have this exact same engine, if the valve covers say “Corvette” instead of “Cadillac”, its not wrong to call it a different engine even if nothing else is different…If you blow your Cadillac 4.2TT you’re going to go to a Cadillac dealership to replace it…
However, with Al Oppenheiser being at the Vette helm, you can be sure there will be differences…
Al Opppenheiser is the Camaro chief engineer. Chief engineer of the Corvette is Tadge Juechter.
You’re right, I stand corrected with a small caveat…If you read a GMA non-ZL1 “Camaro” article, Al is rarely mentioned, if you look at a ZL1 article, Al is mentioned the majority of the time…The ZL1 uses the Z06s engine which does have some differences such as better cooling…
I’ll just patiently wait till GM decides to drop this engine in an Acadia and changes its name to Typhoon.
I’ll take “Things That Will Never Happen” for 800 Alex.
For corvette C8 ME engine :: 5.2-liter, 5.0- liter, or 4.9-liter DOHC V8 engine, Four Valves, TT turbocharger’s on these side of the block. No hot V configuration or 4.2-liter engine displacement that’s for Cadillac.
Speculation abounds in regards to this new Twin Turbo V8. I would like to see GM use this in C8 Corvettes or engine similar to it. 550h/p with 627 lb ft Torque is plenty for me. Unfortunately the price tag will be out of reach for the average customer.
There is a CAD picture of a TT DOHC V8 engine behind these C8 corvette ME that look’s nothing like a Cadillac’s V8 engine, these Turbo’s are on these side of these block, it doesn’t have these Hot V configuration, manifold etc is different. It doesn’t show any of these configuration of Cadillac’s V8 engine in that CAD picture. Also I’m thinking there will be only one TT engine (5.2-liter or 4.9-liter) not two as of what people keep saying on other website’s. I think there will be a High-performance hybrid system with these TT V8 engine, on these zora model of these C8 ME that will take it to very high hp/torque numbers, performance.
I am thinking in a couple of years Corvette will get some form of this engine. Different displacements,different heads,different turbo placements or whatever. I am betting it will happen. Too munch time and money spent to keep it completely Cadillac.