How Mercedes Made The Most Powerful 4-Cylinder Engine In The World
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Published 2019-08-14
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Mercedes AMG has cranked out a gem of an engine. The hand built M139 is a 2.0L turbocharged inline four-cylinder that makes 416 horsepower! That makes it the most powerful turbo four-cylinder engine currently in a production car! The M139 engine is used the Mercedes GLA45, CLA45, and A45 vehicles. 416 horsepower at 6,750 RPM and 369 lb-ft at 5,000 RPM. With a displacement of 1991 cc, the M139 makes over 208 horsepower per liter! It also has some of the highest peak combustion pressures of any engine.
How did Mercedes do it? Clever engineering. From the engine layout, to the roller-bearing twin-scroll turbos, to the block and forged internals, to the cylinder head, to the spray on cylinder liners, the engine is packed with brilliant engineering features. How does it all work? Check out the video for full details!
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All Comments (21)
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How did Mercedes make the most powerful 4 cylinder engine in the world? Simple. Boost. Boost. Boost, with a generous helping of yet more boost.
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Well I guess it only has to last until the warranty expires!
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Meanwhile, at VW, "how can we make a plastic engine block..."
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konigsegg: hold my beer makes a supercar with a 3 cylinder
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Four minutes in and we get the answer, 30psi of boost.
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You just have to love people who knows what they are talking about, like this guy! Greetings and many thanks from Trondheim, Norway!
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Great improvements from Mercedes Benz and also by me, because I now understand your drawings and can follow the explanations through them, Jason. Thank You. What is the most impressive technology for me, is the Nanoslide that "sticks" the oil to the cylinder walls that reduces the Friction BY 50%! and the TWAS which also compensates the Closed Deck Heads.
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Love your videos man i learned a lot, your hard work is paying off!!
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The $54k driveable German grenade!
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What an incredible engine, it’s too bad that many owners won’t know anything about their amazing engine! They drive it because it’s an AMG and therefore has a lot of power.
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I enjoyed this video immensely. I appreciated your excitement about this engine.
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Awesome breakdown. You have great content. Thank you for your efforts.
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Thanks Jason, for explaining some very complicated technology extremely well. The specific output of modern engines astounds me, having become interested in cars in my middle teens in the early 60s. At that time, American muscle was hitting about 1 hp/cu in on the hottest cars (about 61 hp/l.). The fastest European cars were getting close to 100hp/l, which was about what race cars got. I’m fascinated by this technology which makes more than 200 hp/l possible ON A PRODUCTION CAR! 😵
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Honda Civic Type R: I have the most powerful 4 cylinder engine Mercedes: Hold my engine oil
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In my experience, I’ve found the heat saturation gains from mounting the turbocharger on the firewall-side of the bay can also aid in catalyst light-off and therefore reduce tailpipe emissions. I would not be surprised to hear this was also a consideration with the new EU 7 targets on the horizon.
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Amazing video!! thumbs up for you and thumbs up for Merc for giving so much thinking on their engines, I meant this truly is race engineering applied on streetcars.
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Turbo roller bearing ,spray on coating ,electric waterpump.. sounds like endless money pit around age 6 years old.
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Right after I heard the words Turo I was expecting to hear about its quirks and features.
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One of your best videos I have seen to date - Amazing Merc Engine... 416 HP out of that little 2L is looney tunes! (And people ask what F1 does for road cars...) Also, TURO is awesome - I have been using it for 5 years now and its AWESOME!
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Insane progress from Mercedes, throwing everything at it
