Mercedes-AMG A45’s 2.0L Turbo Four To Be Utilized By Other Performance Models As Well

The most powerful series production 2.0-liter, four-pot currently resides in the Mercedes-AMG’s 45 and, in top form, kicks out a very healthy 421 PS (415 HP / 310 kW) and 500 Nm (369 lb-ft) of torque, directed to the all-wheel drive via an eight-speed, dual-clutch transmission.

This allows the new-gen A45 S and CLA 45 S to sit at the top of the food chain in the compact segment, edging out key rivals from Audi and BMW.

But why did they go to such great lengths (and investments) only to limit the offering to the high-end versions of the new A-Class and CLA? Well, according to PaulTan, quoting the AMG head honcho, Tobias Moers, there’s much more to it than that.

Also Watch: Does The New Mercedes-AMG A 45 S Have The Edge Over The Old Car?

During the 2019 Frankfurt Motor Show, where the two 45 S models were on deck, Moers said: “The reason [why it makes so much power] is that we’re going to use it for further applications, which are not necessarily east-west applications.” In plain English, he confirmed that it can be mounted longitudinally as well, as opposed to the transverse application in the A45 and CLA 45, thus opening the door to numerous possibilities.

Nonetheless, it probably won’t give birth to a C45 or an E45, but could replace the ICE units of the 43 and 53 models, albeit with the help of electrification. Mercedes-AMG has already announced it will to go down this road, and adding an electric motor will make the already powerful engine even crazier.

Could it, as some suggest, eventually take over even the 4.0-liter twin-turbo V8 found in modern AMG 63s, producing around 600 horsepower? Sure, downsizing and electrification are all the rage in the industry right now, though that seems like a very long stretch, especially for high-end AMGs where, we presume, four-bangers won’t sit very well with customers right now.


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  • Elmediterraneo

    There is also the AMG GLA 45 S and GLB 45 S coming soon.

    • Bash

      You beat me to it.

    • Kagan

      They are a-class to, doesn’t count!

  • Vassilis

    Mighty engine. I think it’s world’s best in terms of specific output currently. Crazy.

    • SteersUright

      Definitely. Question is, does it have any shot at being a reliable engine? I suppose only time will tell. I certainly hope MB overengineered it a bit as I cant imagine it would be inexpensive to repair when the time came.

      • Vassilis

        I think it’ll be OK. There were questions about the outgoing engine’s reliability as well and I think it’s fine.

    • gambit gamboa

      Wrong, they are many years late. EVO VII FQ400 had 405 HP stock on its 2.0L which was 16 yrs ago and can be tuned for even more. The new engine from benz is nothing special.

      • Vassilis

        Did you even read what I wrote? The Merc’s engine makes 420 hp so currently, it is the world’s best in terms of specific output. What exactly is wrong? And how on earth can you think it isn’t a special engine since it clearly is.

        • gambit gamboa

          They just increased the amount of PSI on the boost to 30. Thats nothing special, you can do that with most high performance turbo engines. The FQ400 starts with 20 PSI boost and made 405HP which was sixteen years ago, when increased to 30 it gets the same results so dont act like benz re-invented the wheel cause they clearly didnt. And for benz to take this long to produce an engine that does 10hp more is actually kind of pathetic.

          • Vassilis

            Why are you trying to make this about something that isn’t? Do you have an issue with AMG? Did I even insinuate anywhere that they re-invented the wheel with that engine? Do you disagree that currently, among even hypercars, that engine has the highest specific output on the market? No because it is a fact. That’s all I said and that’s all there is to it. Anything else is beyond the point.

  • SteersUright

    Will they ever make a properly small, light and agile sports car? No more of this overpriced, FWD-based, fast soap-bar-looking nonsense. Throw this monster 4-cylinder in a shortened & lightened C-class chassis or better yet, come up with a cheaper Boxster-fighter mid-engine chassis for it. If Chevy can come up with the C8 for $60k, surely MB can deliver something amazing as well for $50k.

    • Matt

      Why would Mercedes need to build a lightweight sports car when they can sell three to five times as many AMG A-Classes?

      Absolutely no financial sense in making one unless they want it to flop as bad as the SLK did.

      • SteersUright

        Hello grinch, I suppose Xmas isnt too far away….
        Despite your profound knowledge of auto manufacturing financials I’ve got somethin for ya…Newsflash: Sports cars hardly EVER make business sense! They’re a reward to your most passionate engineers & staff, loyal customers and are almost always partly written off as a marketing exercise because, if done well, garner a ton of press and build excitement around your brand.
        But you’re right, they should just give it all up, not make anything fun and exciting anymore and always remember poor selling models for eternity.

        • Matt

          Not being the grinch…being a realist. I love when carmakers go crazy and build models that don’t make any business sense (like the Megane Trophy-R – despite it’s steep price I doubt Renault will make much profit considering it is a limited production run).

          However the car industry is changing rapidly. You can’t just build models to get ‘written off’ in financial terms any more. Sales are dropping, investment in EV technology is massive and at the expense of other developments and there is more competition than ever. That’s why Toyota had to go to BMW to build the Supra. That’s why Audi is drastically reducing its vast model portfolio. Thats why automakers are desperately building as many SUVs as they can, because they are the only thing guaranteed to sell.

          Mercedes doesn’t need an ‘affordable’ sports car to sell more models. Porsche and others build them better anyway, so if that’s what you want you go to Porsche. Mercedes is better putting that same money into developing EV variants of all their models. Because in a few years that’s what everyone will be forced to buy anyway.

          • SteersUright

            Well said. I’d argue that whatever funds went into turning a FWD hatch, CUV, and whatever else they’re coming our with could’ve gone into a lightweight performance car based on a shortened C-class chassis. Every very high performance FWD car i’ve driven felt compromised to me. FWD sporty cars are at their best at the GTi level, in my eyes. Adding AWD doesnt fix much unless its superbly executed, rear-biased, etc.
            It may be highly unlikely, but I’d love to see someone take on the Porsche Boxster/Cayman at a lower price point and MB has the cash and engineering chops to do it.

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