Difference between TSI and TFSi

[.-Samuel-.]

What is says on the title really, whats the difference between tsi and tfsi?

Tfsi - Turbocharged Fuel Stratified injection

Tsi - Turbochared stratified injection?

The reason im asking is because i can find a turbo upgrade for the 1.4tsi but not the tfsi.

 

[MarkpS3]

Both operate on the same principal, TSI is just the name given to the later, 'improved' version of the (T)FSI engine.

Quite a bit of info here:

http://bd8ba3c866c8cbc330ab-7b26c6f3e01bf511d4da3315c66902d6.r6.cf1.rackcdn.com/FSIvTSI.pdf