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    • Russian Mercedes-AMG X290 GT63 S Coupe 4Matic+ vs. BMW F90 M5 Competition dyno, curb weight, drag, roll, and braking comparison

      A well done independent comparison here by the Russians of the AMG GT63 S Coupe versus the BMW F90 M5 Competition. The mid-size luxury performance sedan offering from AMG and BMW is more alike than ever with the cars being quite similar in their approach to performance.


      The GT63 S Coupe is impressing as of late with handling results on the roadcourse that belie its weight. The GT63 S recently sent a quicker laptime than the F90 M5 around the Hockenheim GP course.

      The Russians start with a dyno comparison.

      GT 63 S:


      F90 M5 Competition:


      Overlay:


      Peak power between the two is very similar but it is interesting to note that despite having less displacement the M177 V8 is offering more area through the curve from 2500-5500 rpm. It is a fairly nice chunk as well. BMW no doubt knows this hence the M5 Competition getting a more aggressive tune yet it still does not match the stock GT63 S.

      The GT63 S certainly needs that torque in the mid-range as it is porky.

      GT 63 S:


      F90 M5:


      The difference is 169 kilograms or 372 pounds. That is significant.

      How do they fare against each other in a drag race? You will need to skip to the 29:00 mark.

      It's close but the M5 edges. The weight difference makes up for the AMG's mid-range torque advantage.

      They do a roll race and the AMG gets an advantage seemling due to where they started in the powerband. The M5 makes up the difference and passes but it definitely takes higher speeds to do it.

      The second roll race seems to have a better start for the M5 and it again it pulls. The M5 Competition is clearly the straightline champ.

      The M5 shows a slight advantage in braking.

      So what do we learn? Well, the Russians focus more on power and straightline racing and that is where the M5 wins. Oddly, the heavier AMG is the better track car as previously evidenced but there is no roadcourse testing in this video.


      It is also as if AMG is now excelling where BMW used to and BMW is excelling where AMG used to. Not that either of these cars is a slouch in any sense.


      Two excellent high performance sedans but this comparison is not as fun as it used to be when they were less similar in their approaches.


      This article was originally published in forum thread: Russian Mercedes-AMG X290 GT63 S Coupe 4Matic+ vs. BMW F90 M5 Competition dyno, curb weight, drag, roll, and braking comparison started by Sticky View original post
      Comments 5 Comments
      1. nbrigdan's Avatar
        nbrigdan -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        seemling
        Impressive that the 63 is faster around a track given it's slower in the straights, has slightly worse braking and weighs more. AMG doing magic to disguise that weight.
      1. hovabongz's Avatar
        hovabongz -
        Isnít the GT63 on cup2(semi slicks) hence the quicker laptime put the same tyres on the M5C and letís see what happens. On similar tyres, non semi tyres on both the M5C and GT63 the M5 was slightly quicker around a track when Autobild tested both on the same day. The M8GC will be getting the cup2 as an option.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by hovabongz Click here to enlarge
        Isn’t the GT63 on cup2(semi slicks) hence the quicker laptime put the same tyres on the M5C and let’s see what happens. On similar tyres, non semi tyres on both the M5C and GT63 the M5 was slightly quicker around a track when Autobild tested both on the same day. The M8GC will be getting the cup2 as an option.
        You raise a good point.

        I didn't see tire specifications in the Hockenheim test videos.
      1. marcvtec's Avatar
        marcvtec -
        Click here to enlarge Originally Posted by hovabongz Click here to enlarge
        Isnít the GT63 on cup2(semi slicks) hence the quicker laptime put the same tyres on the M5C and letís see what happens. On similar tyres, non semi tyres on both the M5C and GT63 the M5 was slightly quicker around a track when Autobild tested both on the same day. The M8GC will be getting the cup2 as an option.
        You are correct the merc comes with cup2 tires, hence why it was faster on the track.
        With both running the same tire compound would be a different story, since the M5 has more speed and less weight.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by marcvtec Click here to enlarge
        You are correct the merc comes with cup2 tires, hence why it was faster on the track.
        With both running the same tire compound would be a different story, since the M5 has more speed and less weight.
        BMW never ran it on the ‘Ring with equal rubber?