AMG may be working up a new, small-displacement V8 for the C63. Autocar reports the Mercedes-Benz performance house aims to replace the naturally-aspirated 6.2-liter V8 found in the brawny C-Class with a turbocharged 4.0-liter V8. Autocar cites unnamed sources as saying the new V8 is built on the same modular bones as the turbocharged 2.0-liter four-cylinder engine headed for the A45 AMG and CLA45 AMG. Both engines share bore spacing and individual cylinder displacement as well as other specifics.

Drivers won't see a cut in power with the move, however. The report says the forced-induction 4.0-liter will deliver 450 horsepower – just under the 451 hp served up by the current C63 AMG. What's more, the engine will likely be capable of generating up to 600 horsepower. That means it could go on to supplant even the 5.5-liter V8 in the SLK55 AMG. While AMG hasn't outright confirmed the 4.0-liter powerplant, Mercedes-Benz AMG CEO Ola Kallenius has made it clear his organization will continue to focus on downsizing engine options in the future.


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    • 1 Second Ago
  • 30 Comments
      Feurig
      • 2 Years Ago
      Looking forward to the torque figures. If it's anything like we expect from AMG, it should be at least 500 ft-lbs.
      carguy1701
      • 2 Years Ago
      I'll miss the 6.2L when it goes away, though. That sound, god that sound...
        OptimusPrimeRib
        • 2 Years Ago
        @carguy1701
        The M156 is one of the best motors in recent memory in my opinion. It had the best sound I've heard in years.
        Evan McMiller
        • 2 Years Ago
        @carguy1701
        First of all...what a**holes are downvoting you...second...one of my best friends drives a C63 with the full MHP package and a Eurocharged tune, it is literally the nastiest, most insane sounding streetcar I've heard in my life. I've heard plenty of GT cars that don't sound nearly as aggressive. It's fun as hell to drive too, the N/A power curve is nice. Very linear. I miss driving that thing, and I'm going to miss the hell out of this engine. One of the all-time greats, by far.
        Dimitri
        • 2 Years Ago
        @carguy1701
        And i get to hear it everyday (;
      carguy1701
      • 2 Years Ago
      The engine in the SLK55 is naturally aspirated, not turbocharged.
      CadiVetteFerrari
      • 2 Years Ago
      I know that turbo engines can provide superior fuel economy while realizing similar or better performance than that of a naturally-aspirated engine of the same type. But the sound of a naturally-aspirated engine is unmistakable and intoxicating, and most will agree that, in general, turbo engines lack that sense. The V-10 from the LFA might have the single best sounding engine today and it's all natural, to boot.
        k.naz
        • 2 Years Ago
        @CadiVetteFerrari
        You are right, since you can hear the turbos spooling in the background, but for vehicles such as the G63 AMG with the new biturbo 5.5 V8, it still sounds great.
      • 2 Years Ago
      [blocked]
        Sean
        • 2 Years Ago
        That's a matter of coincidence and nothing else.
          • 2 Years Ago
          @Sean
          [blocked]
      Vinuuz
      • 2 Years Ago
      The ever expanding world of forced induction engines. I only hope it sounds as good as the other works from AMG, there is no doubt it will deliver power and better torque as compared to the engines it will replace.
      Henry
      • 2 Years Ago
      Good news for all but why show that rear? It sure resembles the rear of the current Nissan Maxima.
      k.naz
      • 2 Years Ago
      I wouldn't mind this engine in a C63, preferably a 4-door model. Combines both sportiness and practicality for young adults without having to go overboard and possibly broke :D
      nsk
      • 2 Years Ago
      This is great news. The n/a 5.5l V8 and its corresponding relatively poor fuel economy, short cruising range, and presence of gas guzzler tax is the only reason I haven't gone for a C63 sedan or M3 sedan. I know the motor sounds great and puts out good power figures, but I'd gladly give up some of its noise for more mpg and range.
        Omologato
        • 2 Years Ago
        @nsk
        Over the past two years AMG has been quietly moving all the "63" models from the NA-6.3L V8 to the 5.5L V8 BiTurbo and keeping "63" badge, the only exception is the C63 AMG. The 5.5L V8 BiTurbo is over 20% more fuel efficient than the 6.3L and there is no gas guzzler tax.
          k.naz
          • 2 Years Ago
          @Omologato
          You forgot the SLS AMG with the 6.2L V8 D:
        Merc1
        • 2 Years Ago
        @nsk
        Do yo know what you're talking about? C63 has a 6.2L n/a V8, not the 5.5L n/a V8, that engine is reserved for the SLK55 AMG. M
          nsk
          • 2 Years Ago
          @Merc1
          Did yo know that was a typing error?
      Luis A. Martinez
      • 2 Years Ago
      Thanks to Nissan this is going to happend,hope the Q on the G37 was only wrong information
      Omologato
      • 2 Years Ago
      Reason 450 [s]"There's no Replacement for Displacement."[/s]
      Feurig
      • 2 Years Ago
      And the SLK55 has the naturally aspirated 5.5L V8 from the other 63s in the AMG line (except those are biturbo), not biturbo like this article suggests.
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