Stellantis' new 6-cylinder engine produces 750 HP with a manual transmission and rivals the Ferrari V6

While Maserati has its MCXtrema and its 3.0-liter V6 engine, tuned to 740 HP, which Ferrari has just unveiled its 296 GT3 Modificata with a 3.0-liter V6 producing 730 HP, Stellantis continues to demonstrate the potential of its new six-cylinder engine. But, once again, this is happening on the other side of the Atlantic.

We've already talked at length about the new Dodge Charger. And for good reason: from a technical standpoint, this American car is one of the most interesting models in the Stellantis group. It's based on the STLA Large platform and introduces the new GME T6 inline-six engine, marketed by Dodge as the SIXPACK. In the production Dodge Charger, this engine is available with 550 HP in its High Output. But two prototypes now demonstrate just how far this mechanical platform can go: 750 HP, rear-wheel drive, and… a manual transmission!

Two 750 HP Dodge Chargers with manual transmissions

These are the Dodge Charger BOOST and Dodge Charger RPM, two cars developed by Dodge for drifting, Hemmings and Suppy’s Garage. The base models are new Dodge Chargers equipped with a 3.0-liter twin-turbo six-cylinder engine producing 550 HP. But virtually everything else has been redesigned to turn them into drift machines.

Power thus reaches 750 HP, with two different options: the BOOST replaces the two original turbos with a single large turbo, while the RPM retains a significantly modified twin-turbo setup. Even more interesting: the all-wheel drive and automatic transmission found in production Chargers are gone. The engineers created custom clutch housings, modified the drivetrain, and converted the cars to rear-wheel drive with… a manual transmission. Three pedals and a shift lever: a combination that has become almost exotic on a modern car with this much power.

These two Chargers, which were first unveiled at Roadkill Nights, are back in the news because they’re participating in the GRIDLIFE Laguna Seca Festival September 18–20, 2026.

A Stellantis six-cylinder engine that flexes its muscles

Obviously, this isn't a future production Dodge Charger with 750 HP and a manual transmission. Both of these cars are heavily modified prototypes. But their existence illustrates something interesting.

Stellantis now has in its engine lineup an STLA Large platform designed to handle high power outputs, as well as a new 3.0-liter twin-turbo inline-six capable of producing 750 HP in this configuration—without any hybrid technology. And this engine is not entirely unfamiliar to the Italian automotive world. The GME four-cylinder belongs to the same broad engine family and has been powering the Alfa Romeo Giulia and Stelvio for years, without this seeming to pose a problem for Alfa Romeo enthusiasts.

The comparison is inevitably tempting. Ferrari gets 730 ch from its 3.0-liter V6 in the 296 GT3 Modificata, while the Maserati MCXtrema’s 3.0-liter Nettuno V6 produces 740 HP. With 750 HP, the Stellantis inline-six is therefore, at least in terms of raw power, in a comparable range. It even comes close to the 800 HP delivered by the Lamborghini Temerario’s twin-turbo V8 before its electric motor kicks in.

Of course, simply comparing power figures isn’t enough to compare engines or cars with radically different design philosophies. But the figure does allow us to gauge the potential achieved by this powertrain, developed by Stellantis in North America. And that naturally leads us to look at what’s happening on our side of the Atlantic.

And why not Alfa Romeo?

For now, Stellantis’s most spectacular technological demonstrations seem to be coming primarily from its U.S. division. With the STLA Large platform, a six-cylinder engine, rear-wheel drive, and now a manual transmission, Dodge is demonstrating exactly what can be achieved with the group’s new technologies.

In Europe, the picture is quite different. The upcoming Alfa Romeo Giulia (2026) and Stelvio (2025), which were once expected to benefit from STLA Large LP3, available only in the 100 % electric version, have since were canceled. Yet, on paper, in our view, Alfa Romeo would likely be the Stellantis European brand for which such a combination would seem the most natural: a six-cylinder engine, rear-wheel drive, high power, and a manual transmission.

So here’s the paradox: Stellantis now has, somewhere in its massive parts library, a modern six-cylinder engine capable of producing 750 HP, a recent platform suited for rear-wheel drive, and concrete proof that a manual transmission can be paired with the whole package.

And while Stellantis’s U.S. division continues to develop—and, above all, showcase—its own technical solutions, it’s hard to find an equivalent in Europe. Among the anticipated innovations is the upcoming STLA One platform, while an increasing portion of the group’s European technology announcements involve partnerships or collaborations with Chinese companies such as Dongfeng, Leapmotor, CATL, and even Huawei for Maserati.

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