Board: Other Sports Cars Language: English Region: Worldwide Share/Save/Bookmark Close

Forum - Thread

    Acceleration question for M3 vs. CSL

    I read the comparison test between a standard BMW M3 with manual transmission and the M3 CSL with SMG II in the October issue of the EVO Magazine and I am profoundly confused about the performance numbers they published.

    How is it possible that a standard M3 with a power-to-weight ratio of 219bhp/ton could be 0.2sec faster from 0-60mph then the CSL with a power-to-weight ratio of 255bhp/ton?

    I don't claim to be a great expert but these numbers really do not make sense to me. Isn't the power-to-weight ratio a fairly good indicator for performance, particularly in straight-line acceleration?

    Any and all explanations would be highly welcome.



    Re: Acceleration question for M3 vs. CSL

    I have not used BMW's SMG II but some sequential gearboxes have difficulty on takeoff compared to a manual or an auto with torque converter. You can't get the right amount of wheelspin to launch the car. This could explain the difference.

    Re: Acceleration question for M3 vs. CSL

    I always thought high-rev drop clutch starts were a bit of a stretch as a benchmark. Would love to see people start quoting 5mph roll-on accel numbers more... or at some point maybe there won't be any more true manuals around and it won't matter? I wish there was some way to get my Tiptronic system to shift into neutral just so I could listen to the engine at stoplights Some systems allow neutral if you pull on both paddles at once don't they? Ramble ramble ramble...

    Re: Acceleration question for M3 vs. CSL

    The SMG system is somewhat disdvantaged off the start, and cannot rip off power shifts like you can with a standard box. It basically comes down to how much you want to abuse your transmission and drivetrain. SMG doesn't let you.

    But unless you are participating in a sprint race, acceleration from a dead stop doesn't mean much.

    Re: Acceleration question for M3 vs. CSL


    i was thinking about an M3 ... and testdrove two cars ... one with manual transmission ... the other one had SMG II !!!

    And i guess i am about the only one who'd stick with the manual transmission ... i did not like SMG at all !!!

    First of all i felt that the SMG car was slightly slower in acceleration ... and under a fully pushed throttle the SMG changed gears with an unhealthy noise and under a sharp mechanical tug !!! I did not feel to much confident about durability ... driving in the auto-modus was totally useless ... no comparison to a conventional automatic transmission, that shifts gears slower but much more smooth ... the SMG had signicant problems when velocity was varied more or less rapidly.




    Board Subject Last post Rating Views Replies
    Porsche Sticky SUN'S LAST RUN TO WILSON, WY - 991 C2S CAB LIFE, END OF AN ERA 1/19/18 10:13 PM
    263655 1687
    Porsche Sticky OFFICIAL: New 991.2 GT3 (2017) 1/21/18 5:31 PM
    Boxster Coupe GTS
    260593 4018
    Porsche Sticky OFFICIAL: 911 GT2 RS (2017) 1/23/18 1:35 PM
    89759 1394
    Porsche Sticky 992 (Next 911 generation 2019/2020) 1/12/18 7:11 PM
    67527 673
    Porsche Sticky Porsche Mission E - the future of Porsche? 1/3/18 8:32 PM
    CGX car nut
    39875 468
    Porsche Sticky OFFICIAL: New 991.2 Turbo S Exclusive Series (2017) 11/28/17 12:15 AM
    23926 332
    Porsche Sticky OFFICIAL: New Porsche Carrera T 12/1/17 7:24 PM
    13729 243
    Porsche Sticky OFFICIAL: Porsche 718 GTS models (Oct. 2017) 10/24/17 12:19 PM
    7291 19
    Porsche 918 latest news Thread Closed 11/6/17 10:43 AM
    548417 5574
    Porsche 991 GT3 RS 1/9/18 1:43 PM
    456625 5816
    Porsche OFFICIAL: 991 Turbo and Turbo S 10/26/17 1:33 PM
    446383 4239
    Porsche OFFICIAL: 2016 Porsche Carrera 911 [991.2] Facelift 3/24/17 12:49 PM
    254981 1382
    Porsche OFFICIAL: 911 R (2016) 1/4/18 9:14 PM
    247604 2558
    Porsche 997 GT3 RS 4.0 3/15/17 10:40 PM
    231293 737
    Porsche Cayman GT4 12/30/17 11:07 AM
    Boxster Coupe GTS
    213276 2482
    Porsche 991 GT2 RS (2017) - Rumors, speculations and gossip Thread Closed 7/3/17 2:04 PM
    175537 1699
    Porsche The moment I've been waiting for... 11/13/17 2:32 AM
    165152 874
    Porsche OFFICIAL: New 991.2 Turbo and Turbo S 1/23/18 12:27 AM
    164506 1074
    Ferrari 488 GTB/GTS 1/23/18 1:31 PM
    141394 1226
    McLaren McLaren on a winning streak 1/23/18 4:11 AM
    139016 2857
    Porsche 991.2 GT3 Thread Closed 3/7/17 11:47 AM
    125036 1651
    Porsche Boxster Spyder (981) 12/29/17 8:31 AM
    110809 692
    Porsche OFFICIAL: New Panamera (2016) 1/6/18 10:41 PM
    108111 1284
    Others Audi R8 V10 Plus (2016 model) - Review (updated Feb 13th 2017) 1/18/18 11:38 AM
    105677 1869
    Ferrari Ferrari F12 Berlinetta / 599 GTO Successor 12/5/17 3:29 PM
    87271 765
    Porsche OFFICIAL: 718 Boxster (2016) 10/20/17 11:17 AM
    81722 732
    Others VW caught cheating emissions tests 7/10/17 2:36 PM
    81485 861
    Porsche 991 GTS 4/3/17 4:27 PM
    68500 247
    Porsche OFFICIAL: Cayenne (958) Facelift 2014 3/2/17 4:22 PM
    67179 163
    Porsche OFFICIAL: New 991.2 (facelift) Carrera 4 and Carrera 4S 3/30/17 7:33 PM
    Carlos from SpainM
    60368 131
    371 items found, displaying 1 to 30.