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    • AMG M157 V8 vs. M177 V8 - Comparing Mercedes-AMG W212 E63 S tuned output to W213 E63 S tuned output courtesy of Renntech

      A special thank you to our friends at Renntech for indulging BenzBoost in a dyno comparison between the W212 E63 AMG S and its 5.5 liter V8 M157 and the new W213 E63 AMG S and its 4.0 liter M177 V8.


      There are those people who believe the old motor is better and those people are likely fixated on the displacement alone. If displacement solely was king in the Mercedes world everyone would tune 6.0 liter M275 twin turbo V12's and nothing would be able to rival them.

      Well, it is not quite that simple. The new W213 E63 S features a more efficient twin turbo setup.

      The truth? The new car isn't giving up much of anything and will be faster tune only:


      Both E63's are making over 1000 newton-meters of torque which means 737 lb-ft. However, something interesting happens past 4500 rpm.

      Yes, the M157 does have a torque advantage up to 3500 rpm where the M177 matches it. However, the M177 torque curve then has the advantage until redline and it does not drop off to the same degree.

      This leads to a very flat power curve of over 700 horsepower from 5000 rpm to 7000 rpm. You will notice the M157 drops off fairly hard and only revs out to slightly past 6000 rpm. Not to mention, it makes less peak power.

      The M177 has another 1000 rpm of useable power and it makes more power tune only. Essentially, the M177 top end is much stronger. The tradeoff from 2500 rpm to 3500 rpm for the advantage from 4500 rpm to 7000 rpm is well worth it.

      Anyone thinking 1.5 liters is a deal breaker simply is not with the times. The M177 is shaping up as the superior tuning choice and better engine design.

      M157:

      Bore: 98.0 mm
      Stroke: 90.5 mm
      CC: 5461.1
      Horsepower: 577
      Torque: 590 lb-ft
      Redline: 6400
      Compression: 10.0:1

      M177:

      Bore: 83.0 mm
      Stroke: 92.9 mm
      CC: 3982
      Horsepower: 603
      Torque: 627 lb-ft
      Redline: 7000
      Compression: 8.6:1


      P.S. Due to a corrupted file we were not able to get a stock vs. stock comparison. That will come in a later article.

      This article was originally published in forum thread: AMG M157 V8 vs. M177 V8 - Comparing Mercedes-AMG W212 E63 S tuned output to W213 E63 S tuned output courtesy of Renntech started by Sticky View original post
      Comments 8 Comments
      1. Stevenh's Avatar
        Stevenh -
        That 8.6:1 compression on the M177 shocked the hell out of me. Checked C63S specs on MB's site and they're showing 10.5:1 there, but 8.6:1 on the E63S. What is the difference between the two? I thought it was a shared platform.
      1. 93siro's Avatar
        93siro -
        I guess the E63 has a whole lot more boost cramped into it hence the lower CR.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Stevenh Click here to enlarge
        That 8.6:1 compression on the M177 shocked the hell out of me. Checked C63S specs on MB's site and they're showing 10.5:1 there, but 8.6:1 on the E63S. What is the difference between the two? I thought it was a shared platform.
        I had to double and then triple check that it was accurate.

        You will notice it is the same compression ratio as the M133.
      1. RENNtech EUROPE's Avatar
        RENNtech EUROPE -
        Just as a side note: we can get more max torque (mid range) from BOTH engines tune only and as for the M157, we also deliver more with the STD tune... But since we are "for now" limiting the torque on the 9G to 1050Nm, I have provided the results of 1050Nm-tunes for both engines ... It doesn't have an effect on the resulting power and both are showing the TUNE only crank power, which is possible without further modifications ...
      1. Batman's Avatar
        Batman -
        Click here to enlarge Originally Posted by RENNtech EUROPE Click here to enlarge
        Just as a side note: we can get more max torque (mid range) from BOTH engines tune only and as for the M157, we also deliver more with the STD tune... But since we are "for now" limiting the torque on the 9G to 1050Nm, I have provided the results of 1050Nm-tunes for both engines ... It doesn't have an effect on the resulting power and both are showing the TUNE only crank power, which is possible without further modifications ...
        Please correct me if I'm wrong. Are you saying that both engines are "basically" making the same amount of power and torque with a tune only? How many pounds of boost is the M177 engine running compared to the M157?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Batman Click here to enlarge
        Please correct me if I'm wrong. Are you saying that both engines are "basically" making the same amount of power and torque with a tune only? How many pounds of boost is the M177 engine running compared to the M157?
        He's saying they both hit their 'torque limit' over 1050 nm which is where they are comfortable for reliability reasons.

        The M177 is making more power as you can see in the overlay.
      1. Batman's Avatar
        Batman -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        He's saying they both hit their 'torque limit' over 1050 nm which is where they are comfortable for reliability reasons.

        The M177 is making more power as you can see in the overlay.
        How many pounds of boost is the M177 running versus the M157?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Batman Click here to enlarge
        How many pounds of boost is the M177 running versus the M157?
        I don't know. @RENNtech EUROPE