• Stock dual clutch E92 M3 takes on a stock E92 6-speed M3

      This is a debate that ranges all the time on the forums. What is faster, DCT or manual? Well, the dual clutch simply does shift faster and we see time and time again that the manual can not match it. This is a constant on every platform with a dual clutch and manual option (Porsche PDK versus manual direct comparison was posted earlier this year). The more shifts involved the bigger the advantage a dual clutch will have.

      On the M3 the DCT is geared much tighter in 1st, 2nd, and 3rd gears. The manual is geared better for the top end as it can stay in third longer (up to 113 miles per hour) than the dual clutch which has to shift to fourth much earlier. That is why you see the manual creep up in third gear in the video below but it still can not overcome the DCT shift speed advantage despite having lower drivetrain losses.

      This article was originally published in forum thread: DCT M3 VS 6 speed manual M3 started by LostMarine View original post
      Comments 121 Comments
      1. Autobahn335i's Avatar
        Autobahn335i -
        Click here to enlarge Originally Posted by LostMarine Click here to enlarge
        because it allows you to focus on handling the car better, as every automatic does. not because there is a speed advantage
        Of course there is a speed advantage on the race track. Even if you're a very good stick driver, there's just no way you can always shift 100% perfectly, especially as you exit corners and even more as you downshift where you need to rev-match on a manual in order to not upset the rear.

        The AT and DCT do this job for you, consistantly perfect at any time. Around any racetrack this will shave a few tenths off your time. Why is it so hard to admit?

        Then there's the pure shift speed advantage of a DCT. Have you ever heard (or better yet driven) a racecar with a REAL sequential transmission? There's no way even you could shift that fast!