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7/8-speed manual gear box

  • 12-02-2011 8:16pm
    #1
    Ghost Estate
    Closed Accounts Posts: 559 ✭✭✭


    Is there any car with one, or does such a gear box even exist for cars?

    (and I mean a normal manual gearbox not DSG thingies)


Comments

  • #2
    Henry Ford III
    Moderators, Business & Finance Moderators Posts: 17,855 Mod ✭✭✭✭Henry Ford III


    Outside of motorsports applications a 6 speed manual box is the highest number of forward gears I've seen.

    Regular top end autoboxes will frequently have 7 or 8 ratios.


  • #3
    Max_Damage
    Closed Accounts Posts: 5,461 ✭✭✭Max_Damage


    Ghost Estate wrote: »
    Is there any car with one, or does such a gear box even exist for cars?

    (and I mean a normal manual gearbox not DSG thingies)

    Well, off road vehicles have high-low boxes.

    My cousin's Land Rover is a four speed manual, but with the differential box, it makes it 8 speed.


  • #4
    shogunpower
    Closed Accounts Posts: 279 ✭✭shogunpower


    m5's have 7 speeds, and the new 5series ahve 8 speed autos, so does the lexus isf.


  • #5
    Anan1
    Registered Users, Registered Users 2 Posts: 22,815 ✭✭✭✭Anan1


    Any more than 6 forward speeds would be just too much grief for the average driver. Even 6-speed is a PITA if you ask me.


  • #6
    Matt Simis
    Registered Users, Registered Users 2 Posts: 8,718 ✭✭✭Matt Simis


    Anan1 wrote: »
    Any more than 6 forward speeds would be just too much grief for the average driver. Even 6-speed is a PITA if you ask me.
    Well, the Alfa 156 2.4JTD has 5 gears (manual), fine till you get to the motorway then you realise you feel a gear short, revs sitting pointlessly high.
    The 850CSi is 6sp manual and you always can choose the "perfect" gear at any moment.

    However I guess 7gears wouldnt really add anything that 6 dont already do, certainly in a petrol engine with a good wide power band.


    The logic behind 7/8 speed Autos on Diesels is entirely different and applicable to that engine though.


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  • #7
    Anan1
    Registered Users, Registered Users 2 Posts: 22,815 ✭✭✭✭Anan1


    Matt Simis wrote: »
    Well, the Alfa 156 2.4JTD has 5 gears (manual), fine till you get to the motorway then you realise you feel a gear short, revs sitting pointlessly high.
    The 850CSi is 6sp manual and you always can choose the "perfect" gear at any moment.

    However I guess 7gears wouldnt really add anything that 6 dont already do, certainly in a petrol engine with a good wide power band.


    The logic behind 7/8 speed Autos on Diesels is entirely different and applicable to that engine though.
    It's really down to the power band, the wider that is the fewer gears you need. I remember once driving a Mercedes 350SE with a four speed manual, and it really didn't need any more. Of course some tuned-to-death 2.0 diesel might benefit from seven or eight, but at that point auto becomes a must.


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