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    Thread: TFSI vs TSI Engines

    1. 09-17-2008 11:14 PM #1
      Does anyone know what the differences are? and what the letters stand for?

      From what I suppose:

      TSI (Gas Tig)(Turbo gaS fuel Injected?)
      TDI (Diesel Tig)(Turbo Diesel fuel Injected?)

      TFSI (Gas) ???


    2. Member NZTIGUAN's Avatar
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      09-17-2008 11:18 PM #2
      Not certain exactly what the letters stand for but the TFSI is Turbo AND Supercharger. The others are as you have them but maybe the letter designations are German ?

      Cheers

      Derek
      Alexandra New Zealand
      Second Tig, 2013, TDi, Auto, night blue, park assist 2, auto lights and wipers, RCD510, fogs, tow pack
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    3. 09-18-2008 03:17 AM #3

      FSI stands for Fuel Stratified Injection, this is a petrol direct injection system.

      TSI stands for Turbocharger Supercharger Injection, this is the latest system of turbo and supercharged engines.

      and it should follow that tFsi is a combination of both


    4. Senior Member feels_road's Avatar
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      09-18-2008 04:57 AM #4
      TSI used to mean dual charged, but no longer so. Like with quattro/ 4Motion, it has become a VW marketing term that, unfortunately, hides technical aspects.

      Audi retains TSI for the dual-charged engines. On the other hand, the new, completely revised (end of 2007, Tiguan; 2008 all) 1.8 and 2.0 direct-injected and turbo-charged engines are now called TSI by VW.

      See the technical forum for details.

      Aung San Suu Kyi

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      09-18-2008 11:32 AM #5
      TDI also is "Turbo Direct Injection" not Turbo Diesel Injection, although the acronym is used only with the Diesel engine

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      09-21-2008 02:55 PM #6
      Quote, originally posted by Rocc (Jamaica) »
      Does anyone know what the differences are? and what the letters stand for?

      From what I suppose:

      TSI (Gas Tig)(Turbo gaS fuel Injected?)
      TDI (Diesel Tig)(Turbo Diesel fuel Injected?)

      TFSI (Gas) ???

      I have not heard TFSI used, maybe you are confusing the 2.0T FSI as TFSI? My understanding it was FSI and TSI, but never TFSI.


    7. 09-21-2008 04:51 PM #7
      http://allworldcars.com/wordpress/?p=3453




      Modified by Rocc (Jamaica) at 5:54 PM 9-21-2008


    8. Member vdubnut_mike's Avatar
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      09-24-2008 05:11 PM #8
      hmmm.. I stand corrected, I think.

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      09-30-2008 08:18 PM #9
      Here is the official US version (Notice I am not including our fellows to the east of us.

      TFSI- Turbo Fuel Straight Injection
      TDI- Turbo Direct Injection **Diesel Only**
      TSI-Turbo Straight Injection (If we include our neighbors to the east, the defination above would also be true)
      FSI- Fuel Straight Injection

      The names are similar, but too much alphabet soup for me.


    10. 10-02-2008 04:40 PM #10
      Right away I notice cool Halloween smilies when I'm writing this post.
      Pumpkin wink

      vampire smiley

      LOL

      Anyway, just wanted to add my two cents. As far as I understood, the TSI, TDI FSI, TFSI and CSI acronyms (OK maybe not CSI) are not all really english acronyms. For instance TDI is not "Turbo Direct Injection" rather these are German autos with German acronyms which us North American Engligh type's try to make up meanings too.

      That was my understanding as I have heard and seen the acronyms writen in German and its a bit different. We're on the right track, but my point is just that its German.


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