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Performance Model X versus Model S

Discussion in 'Model X' started by Dutchie, Jul 2, 2013.

  1. Dutchie

    Dutchie Member

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    I am just wondering with a dual motor Model X it has been said that torque increases by 50%. Will a 60 KwH Model X with two motors outperform a 85 KwH Model S performance?
     
  2. Eberhard

    Eberhard #421 Model S #S32

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    No, because the output of the 60kWh is more limited as the 85kWh pack. to get full advantage of the dual motor, the pack size have to increase to at least 120kWh or Tesla has to indroduce a chemistry with higher power ability.
     
  3. brianman

    brianman Burrito Founder

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    Also we'll probably never see a real world test as I suspect AWD will be available only with the top battery offering on the X. Similar to the Perf on S.
     
  4. Vger

    Vger Active Member

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    There is the increased weight of the Model X to consider as well.
     
  5. ElSupreme

    ElSupreme Model S 03182

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    Well I think it might help.

    There are 3 limits you need to consider with the Tesla during acceleration.

    First is current limit. This is the amount of electrical current your battery, connectors, and power electronics can handle. Your motor is probably not the weak point here.
    Second is the power limit. This is the amount of power battery can put out. Your motor, and power electronics are probably not the weak point here either.
    Third is your traction limit. This is the amount of torque you can use on the road.

    Adding a second motor (and corresponding power electronics upgrades) could potentially increase the amount of current you could utilize. This would only be apparent at lower power levels (speeds ~0-40 mph).
    When your battery starts putting out maximum power it wont matter how many wheels are turning (assuming you have traction) in regards to acceleration. This probably happens ~40mph in the 60kWh pack.
    Adding a second motor would obviously increase your traction. This might help on poor surfaces.

    Against a 85kWh 2WD Model X non-performance:
    You might gain a tiny amount 0-20mph. Be pretty even 20-40mph. But then start losing more significantly after about 40mph.

    Against any thing performance you will be losing the whole way (unless traction is an issue).
    Against a 60kWh or 85kWh Model S you would be losing due to the probable increased Model X weight.
     
  6. Eberhard

    Eberhard #421 Model S #S32

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    Numbers for Models S Performance

    310kW div 2108kg div 9,81 m/s2 = 14,99 m/s = 53,96kph

    Up to this speed, the dual motor helps to improve the grip and helps to get closer to the physical possible numbers.
     

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