While many automakers are giving up on larger engines and downsizing to turbocharged four-cylinder engines, even in performance cars, Mazda is set to launch a new inline-six engine. Last May, we reported on the Japanese manufacturer working to develop a new straight-six, and immediately recognized strong similarities between what Mazda has been working on, and both current and future products from BMW, Mercedes-Benz, and Jaguar Land Rover.

According to patent filings that have been picked up on by various automotive news outlets, Mazda’s upcoming straight-six will be coupled with a 48-volt mild hybrid system in the next-generation Mazda 6. If a 48-volt mild hybrid sounds familiar in anyway, that’s because it’s the same kind of setup Mercedes-Benz has paired with it’s M256 3.0-liter straight-six, which has been in production since 2017. Jaguar‘s new Ingenium 3.0-liter inline-six is another example of a time-tested engine design being mated to a cutting-edge 48-volt electrical system.

Jaguar Ingenium 3.0-liter inline-six

Jaguar Land Rover’s new 3.0-liter Ingenium inline-six uses both an electric supercharger and a twin-scroll turbocharger.

Digging into more of the details, the new Mazda engine may use the company’s Skyactiv-X compression ignition system, which works exactly as it sounds; the fuel-air mixture is ignited spontaneously as opposed to being catalyzed by a firing spark plug. That’s for the gasoline-burning version of the engine, while there will also be a turbodiesel Skyactiv-D unit. And while we’re on the topic, Mazda’s Skyactive-G technology is a version of gasoline direct injection that has found its way into many of the automaker’s engines, and the new 3.0-liter straight-six is expected to use it as well.

Car and Driver has mentioned a rough estimate of 350 horsepower, which would be more than enough to make whatever Mazda models this engine finds its way into potent competitors. Speaking of actual models, it’s speculated that, in addition to a sporty two-door, a sleek four-door model—think BMW Gran Coupé styling—is also expected to use the engine. This four-door would likely be the upcoming generation of the Mazda 6, which should be on sale by the end of 2022. In addition to the engine, the revamped Mazda 6 is also expected to use rear-wheel drive.

Mercedes-Benz M256 Inline-Six

The Mercedes-Benz 3.0-liter M256 inline-six, which uses a twin-scroll turbo and direct injection along with a 48-volt mild hybrid system.

What does it mean for BMW? Breaking into the entry-level luxury market isn’t easy, but as Genesis and in some respects Kia have demonstrated, with the right staff and great products, it’s not impossible. Whether or not Mazda is able to do the incredible, and compete with the likes of the Audi, BMW, and Mercedes out of Germany, and the miraculous story that is Lexus, remains to be seen, but an effort like the one outlined above sends a strong signal.

Above all though, we welcome another straight-six in the marketplace. And although making an attempt at the same kind of architecture Mercedes has been using is no small undertaking for an automaker the size of Mazda, who better to give it a shot than the company which gave us the Miata and mass-produced rotary engines for over 40 years.—Alex Tock


[Photos courtesy Mazda North American Operations, Jaguar Land Rover, Daimler AG.]



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