1st, it's VTEC. People that know, understand and respect the technology that went into VTEC can get pretty upset if it's not put right. It's not Vtec, V-Tec, VTECH, v-tech or any other variant.... save yourself the useless arguments that can go on for days and take you no place... and just make sure you say/type VTEC. Annnnnnyway...

2nd, there were 3 main models of the Prelude in the 4th generation. (USDM wise anyway)

S ... bottom of the barrel. 135hp. AT or MT

Si ... middle. 160hp. AT or MT

VTEC ... top end. 190hp. MT only.

Each one going up had some extra options here and there also, but nothing huge. The biggest diffrences were the engines, then the brakes/wheels, then little things like leather, wing, better stereo etc.

As stated previously... the SR is basically the Si version for the canadians.