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GM Makes Mopar Fans Jealous With New Twin-Turbo “LT7” Engine

New V8 From GM, Dethrones C170 HELLEPHANT As Most Powerful V8...

Chevrolet has unleashed a new beast in the automotive world with the 2025 Corvette ZR1, boasting an impressive 1,064 horsepower from its all-new LT7 engine. This twin-turbocharged 5.5-liter DOHC flat-plane crank V8 is setting new benchmarks and leaving Mopar fans green with envy, especially in light of recent changes in Stellantis’ engine lineup.

The LT7 engine in the 2025 Corvette ZR1 produces a staggering 1,064 horsepower at 7,000 rpm and 828 lb.-ft. of torque at 6,000 rpm. These numbers make it the most powerful V8 ever produced by an American auto manufacturer. Chevrolet estimates that the ZR1 can achieve a top speed of over 215 mph on the racetrack and can complete the quarter-mile in under 10 seconds.

Supercharged 6.2-liter HEMI® HELLEPHANT C170 V8. (Stellantis).

When stacked against the 2023 Dodge Challenger SRT Demon 170, the Corvette ZR1’s performance is even more impressive. The Demon 170, powered by a supercharged 6.2-liter HEMI V8, produces 1,025 horsepower and 945 lb.-ft. of torque. While these figures are remarkable, the ZR1’s twin-turbocharged V8 edges out the Demon in terms of horsepower, highlighting General Motors’ (GM’s) dedication to pushing performance boundaries.

Mopar enthusiasts have long cherished the HEMI V8 for its raw power and distinctive sound. However, Stellantis has discontinued most of its HEMI V8 lineup in favor of twin-turbocharged inline-six engines and electric vehicles (EVs). This move has left many fans disheartened, feeling that the automaker is moving away from its high-performance roots.

Twin-Turbocharged 5.7-liter DOHC “LT7” Flat-Plane Crank V8. (GM).

While Stellantis shifts focus, GM and Ford continue to invest in high-performance V8 engines. GM recently announced nearly $1 billion in funding for the development of a next-generation small block V8. On the other hand, Ford is working on the Mustang GTD, featuring a new version of its 5.2-liter V8 that delivers 800 horsepower.

Both GM and Ford are leveraging their EV programs to offset fuel emissions requirements, allowing them to maintain V8 engines in their lineup. This approach ensures that enthusiasts still have access to the powerful engines they love while also meeting modern emissions standards.

Twin-Turbocharged 5.7-liter DOHC “LT7” Flat-Plane Crank V8. (GM).

Stellantis reported a 48% drop in net profit for H1 2024 compared to the previous year, along with a significant decline in sales in the North American market. Stellantis plans to lower prices on some struggling nameplates to regain customer confidence. However, many believe that the company’s CEO, Carlos Tavares, does not fully understand the preferences of the North American market.

The decision to move away from V8 engines and towards EVs and inline-six engines may alienate a significant portion of Stellantis’ customer base. While EVs are gaining popularity, a majority of customers still prefer the traditional power and performance of V8 engines. If Stellantis fails to address these preferences, it risks losing loyal customers to competitors like GM and Ford.

Twin-Turbocharged 5.7-liter DOHC “LT7” Flat-Plane Crank V8. (GM).

The 2025 Chevrolet Corvette ZR1 is a testament to Chevrolet’s commitment to high-performance engineering. Its LT7 engine sets new standards for power and performance, making it a formidable competitor in the supercar segment. Meanwhile, Mopar fans face uncertainty with Stellantis’ shift away from the beloved HEMI V8. As GM and Ford continue to innovate with powerful V8 engines, Stellantis must carefully balance its transition to EVs with the desires of its traditional performance-focused customer base.

Robert S. Miller

Robert S. Miller is a diehard Mopar enthusiast who lives and breathes all that is Mopar. The Michigander is not only the Editor for MoparInsiders.com, 5thGenRams.com, and HDRams.com but an automotive photographer. He is an avid fan of offshore powerboat racing, which he travels the country to take part in.

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While EVs are gaining popularity, a majority of customers still prefer the traditional power and performance of V8 engines. If Stellantis fails to address these preferences, it risks losing loyal customers to competitors like GM and Ford.

Both GM and Ford are leveraging their EV programs to offset fuel emissions requirements, allowing them to maintain V8 engines in their lineup. This approach ensures that enthusiasts still have access to the powerful engines they love while also meeting modern emissions standards.

Battery electric vehicle market share is stalled around 7% of sales. Auto manufacturers are currently moving their EV merchandise by offering give away lease deals. While GM and Ford wanted to "leverage their EV programs to offset fuel economy requirements," which would allow "them to maintain V8 engines in their lineup", the reality of today's market doesn't allow this.

Both Ford and GM are losing their assets on their EV programs. I don't know where GM got the billion dollars to develop a new V8, maybe it was the sales profits from those electric Hummers.

The decision to move away from V8 engines and towards EVs and inline-six engines may alienate a significant portion of Stellantis’ customer base. While EVs are gaining popularity, a majority of customers still prefer the traditional power and performance of V8 engines. If Stellantis fails to address these preferences, it risks losing loyal customers to competitors like GM and Ford.

Once again EVs are not gaining in popularity. The early adopters have already purchased them and the market plateaued because middle class consumers are rejecting the costs and the necessary lifestyle changes of owning an EV.

A significant majority of Ford F-150 buyers choose six cylinder engines. While "a majority of customers still prefer the traditional power and performance of V8 engines", the sales reports of all the brands industrywide doesn't support a preference for V8s.

This article fails to mention gas-electric hybrids which are rapidly gaining in popularity. Stellantis is also investing in hybrid technology. The new inline six cylinder engines offer similar power and performance to a V8 engines. I don't know if Ram and Jeep will combine the inline sixes with the next generation hybrid systems.

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Both GM and Ford kept alot of other powertrain options available while Mopar went V8 heavy and toppled over. But if you notice a theme, Both GM and Ford are now playing in the 5-liter group, much like the old days of Trans Am Racing. A smart move for Stellantis to play would be their own version of a 5.2L (318ci) V8 DOHC with an N/A version and a twin turbo variant to go along with their hurricane powerplants which would allow them to get back in the V8 game once things settle down a bit. Only thing is, I think the Hurricane engines are going to be extremely successful to a broad range of people, especially if they bring out a pair of potent 2.0L and 2.4L Hurricanes pushing roughly 325hp and 385hp respectively on the low end of things for the STLA Medium and base SLTA LArge cars along with the three variants of the 3.0L Hurricane (standard, high output and Cat X) and even the potential of a larger 3.8L Hurricane. Turbo cars respond very well to modifications and if Direct Connection gets involved with stage kits. We're going to see Dodge do what the MKIV Supra and R34 Skyline did in the late 90's and early 2000s where they quickly became competitive with American V8s and in alot of cases beat them and also were way easier to modify to get impressive power gains and also see the 4-cylinder variants become what cars like the SRT4 cars and other tuners became back then. The hurricane family may actually bring back the affordable, modifiable muscle car. Don't get me wrong, these 1,000+ hp cars are amazing but not fun to the average guy and there is no point to modifying them. just my opinion

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Nothing promises that a V8 would be more potent than the I6. For several reasons. At this point it just about marketing. The 4.0 version of the engine you talked about exist and it was NOT nearly as potent.

Remember Corvette and Mustang Dark Squirrel or whatever it is called is basically the bespoke Halo models. These are not volume powerplants.

Nothing keeps the same thing from happening at Dodge but seems like a lot of work for something that would be marginally more potent and way more expensive.

Entire tuner culture embraced i6 at BMW and Nissan. We should also, like the 80s embraced the 2.2 Turbo.

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EV market is slowing down and this evident by the German automakers rethinking their strategy.

The I6 can have better performance than the V8, but the performance minded poeple will still choose a V8, and a clear example is the new C63 AMG and its sales number and how this made Mercedes rethink the V8 for its coupe sibling.

The HEMI Challenger and Mustang were neck to neck in the sales race.
So, let’s see how the numbers stack up when it comes to a V8 Mustang vs an I6 Charger Coupe.
Better yet let’s see how the refreshed Ram will fair against Ford and GM twins.

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