VAG 1.4 MPi engine question

[The DJ 27]

The engine comes in three different versions as I understand it; 60bhp, 75bhp (which I have) and 100bhp, as used in the Lupo Sport and stuff like that. What is the difference between the 75bhp and 100bhp units? Is it purely a matter of changing the chip, as in the Mini One, or is there more to it than that? Just out of interest you understand...

[KITT]

Isn't the 100bhp one 16v and the other two 8v? I've got the 100bhp one in my Polo and that's certainly 16v

[edc]

No chip is going to make a 1.4 n/a go from 75 to 100 bhp.

[The DJ 27]

No mines a 16v engine as well. I was just thinking that it may have been a similar situation to the MINI. I.e, by changing the ECU program on a Mini One, you have a Mini Cooper engine. The ECU on the Mini One doesn't allow the throttle body to open fully, hence less horsepower