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Thread: What's the difference?

  1. #1
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    Default What's the difference?

    I know i'm heading for some serious slagging here..... but what's the difference between a CDTI and a DTI?

    Someone asked me this morning and i couldn't answer!!!!!

  2. #2
    Regular Member VectraV6CDTi's Avatar
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    The badge?





























    No, ones common rail and the other aint

  3. #3
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    .................... and what does that mean??


  4. #4
    Regular Member Hideous's Avatar
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    one's fast and...



    one's slow

  5. #5
    Regular Member Green Growler's Avatar
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    Basically, the difference is the way the fuel is delivered/injected into the engine.
    The DTi being the old school way of doing things.
    The CDTI being fiats way of doing things, that's why they keep braking down.

  6. #6
    Regular Member Coastie's Avatar
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    how much plastic is under the bonnet ? lol

  7. #7
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    .................about 50bhp

  8. #8
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    Quote Originally Posted by Hideous View Post
    one's fast and...



    one's slow
    Give me a week and we'll find out who's is faster

  9. #9
    Ex Vec-C Admin ed taylor's Avatar
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    Vehicle : Vectra Estate

    Trim : Elite

    Engine : 3.2 V6

    Year : 04

    Mileage : 000

    Default

    I might be wrong, but isn,t the CDTI driven by a belt and the DTI a chain?

  10. #10
    Regular Member VectraV6CDTi's Avatar
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    A common rail diesel engine differs from a conventional diesel enigine in several imporatant respects. A conventional diesel engine works via a mechanical injection system, which relies on the enigine's diesel injection pump to deliver the required fuel pressure, at the correct time, to the diesel injector in order to allow the injector to operate. Each individual injector on a conventional diesel engine has its own pipe or "rail" connecting the injector to the mechanical pump, allowing the delivery of fuel to the injector.

    Common rail diesel injection systems work on a much different principle. In this system the mechanical controls are replaced by electronic controls to allow for more precise metering and timing of the fuel delivery into the engine, and therefore the injection pump is no longer solely responsible for the operation of the injection system. Also, the individual injector rails are replaced by 1 (or 2) "common rail" which operates under a constant high pressure. There is no injection pump associated with this system, yet a high pressure pump is still required to deliver the high pressure fuel to the common rail.

    The high pressure pump is capable of producing (depending on the system used) approximately 29000 psi of pressure into the common rail. At the correct time the electronic injector is operated and the fuel is injected into the engine allowing ignition to occur. The timing and fuel quantity is controlled by an advanced engine management system which gathers data on the engine conditions via a collection of sensors. All of these sensors measure different system parameters to calculate the correct fueling for the engine at any given moment.

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