Mercedes-Benz Hints Its New Turbo Four Could Eventually Get Over 415 HP!

Mercedes-AMG will launch its new 2.0-liter turbo four in a handful of AMG 45-badged models in the very near future and has suggested that it could get more powerful.

The M139, as it is code-named, has already been officially confirmed with a peak output of 415 hp and 369 lb-ft (500 Nm) of torque. Power per liter sits at an impressive 208 hp, making this the most powerful mass-production four-cylinder road car engine ever.

Compared to the M133 that powered the previous-gen AMG 45, the M139 has been flipped 180 degrees, with the turbocharger and exhaust manifold now facing backwards. The turbo also features roller bearings and the engine incorporates an improved exhaust manifold helping to prevent individual cylinders from negatively influencing one another during load cycles, while it runs on 0W20 oil (!) and still needs servicing every 20,000 miles or once a year, whatever comes first.

Also Read: Mercedes-AMG’s New Turbo Four Engine Rated At 382 HP In A45, 415 HP In A45 S

Producing a turbocharged four-cylinder engine with so much power is an impressive feat, made possible by numerous upgrades that range from new oil- and water-cooling systems to forged aluminum pistons and an ultra-strong crankcase, but Affalterbach’s engineers don’t appear finished with this powertrain.

During a recent presentation, Mercedes-AMG head of engine development Ralph Illenberger indicated to Car Sales there is more grunt on the agenda.

“There will be more to come. There’s always room for improvement. But 421 PS is really quite a high number, especially when it’s also street-legal. That was the challenge. We’ll see what the future will bring,” he said.

If AMG does boost horsepower and torque figures from this engine, we could end up with some very exciting performance cars. And to think that a blue-blood supercar of the early 2000s, like, theFFerrari 360 Modena, had “only” 395 horses at its disposal (and less torque) – and, from what we recall, was ferociously fast.

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  • Merc1

    We should see the CLA45 and GLB45 here in the U.S. They’re going to be a riot to drive. Like holding a lit firecracker with this screamer of an engine.



  • Astonman

    I’m going to miss news like this when we get into electric: The engineering abilities of these car manufacturers to differentiate themselves from the rest will be gone.

    • SteersUright

      What a silly comment. Why would you imagine that human ingenuity would cease with the combustion engine?

      • Astonman

        You could be right – I figured an electric motor is so simplistic, how far can you improve it. There’s room for batteries of course with energy density. But going forward with exotic cars, what can the Ferraris and McLaren and others do to the electric motor that makes it their own to differentiate from the others middle of the road brands? This intrigues me greatly. I could be wrong about innovation, I hope I am!

  • Elmediterraneo

    German medias are also talking about a 470/480 hp hybrid version of this engine with the same power for the petrol side.
    This engine will be in the :
    A45 hatchback (EU only)
    CLA 45
    CLA 45 shooting brake (EU only)
    GLA 45
    GLB 45

  • eb110americana

    The once per year service cycle seems pretty intense when most modern engines have a 100,000 mile service apart from routine fluid and filter changes. That said, a PHEV version of this could easily hit 500 HP, which would be enough for all but the chunkiest of AMG tow rigs. That’s pretty impressive considering that the V12 was basically a necessity if you wanted any kind of power in a Mercedes only a few decades ago. Their V8 has shrunk to 4.0L and the V12 is on the way out. One wonders if the V8 may be the next to go.

    • Bhaskar Manda

      Indeed. The Peugeot 508 SW Sport Engineered (concept, but slated for production) makes 400 hp, 500 Nm torque with a 1.6T engine, 2 electric motors, and an 11 kW battery

    • Matt

      Yearly service intervals are pretty normal – I have my car serviced every year. Performance engines by their nature have shorter intervals because components and fluids are much more stressed, it’s hardly surprising.

  • Bash

    Very nice.

  • SteersUright

    Seriously impressive. Lets see how much power they can get out of their new Inline-6 also based on this 4-cyl. Do have to wonder about long term longevity though and cost of parts once out of warranty. Still, amazing power density.

  • JohnCarscoop

    It isn’t being announced again. The story you linked is about the current production specs, this one is about the possibility of an even more powerful version in the near future

  • Axel Cortez

    as I said in another article hope they fixed the transmission that loves to grenade itself from the A180 all the way to the A45 (I had to rebuild an A45 transmission)

  • PK

    Mercedes Benz will eventually have to getting rid of all the petrol combustion engines factory and move onto 100% electric in the next decades or so.

  • Charles Chin

    Super stout block, anyone noticed how heavy that engine is? Heavier than some 6cylinder turbocharged engines.

    • Kagan

      Well people think just because it has less cylinders and displacement it will weight much less but that ain’t the case, same goes for ordinary turbo engines too.

      I don’t know maybe it still has weight advantage compared to a v8

    • Kagan

      Compare it to an ls or Lt engine with some power output, anybody?

  • Stephen G

    WOW this is amazing. Now that powerful electric cars with no maintenance schedules are becoming popular all of a sudden ICE are doing the same. 415hp form 2.0 liters and 20K mile oil changes up from 3. What incredible technological breakthrough suddenly occurred?

    • Ben

      Nearly every owner of any vehicle that sees such a higher reading from the odometer always tells me manufacture suggested upkeep is bullshit, stick with the old time tested schedule. Don’t listen to this “life long” fluid nonsense and change your oil every 3k.

    • Kevin Cagle

      3d printing/cad modeling, bench data with very specific heat and flow detail, extremely tight machining tolerance. oiling and cooling channels are very specific now and dont have to interact with the cylinder as much. Meaning less oil, less fluids, cleaner oil for longer periods of time, etc. That’s why you are seeing things like 0w40 oil now. The range of error though is reduced dramatically. an old v8 389 can take all kind of abuse and rattling without much damaging it, but you also have to use a heavyweight oil. In a modern engine like these they are awesome until they are not. These types of engines have not been on the market long enough yet to see how they fail in catastrophic situations.

      • gambit gamboa

        Wrong, thinner oil creates bigger probability of friction between metals. Ask the third party mechanics and they love it when you bring in a modern bmw/benz for repairs. More electronic components exposed to heat and cold = more probability for malfunction. Car companies know people are too poor to shell out 50k cash for their cars so they added as much features so that it works for the first 5 years as after the lease ends nobody wants the bill to repair these cars so theyre thrown out.

        Cheaper to pay $600 every month and become a budget baller than to fork out 60k all at once, then lease again for model refresh. These cars wont last long after 5 years without big repairs. Rated junk.

  • Ermal Morina

    why do I smell an A45 Black Series

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