I read an article the other day where one of the heads of the engine design crew stated they kept the HP down on the SI in order to maintain the life of the motor. That basically if they went higher that, the longevity of the motor wouldn't be as good. Of course they didn't state where the limit was to where the life of the motor would really be effected but this was in regards as to why the HP wasn't closer to the Type R. They also remarked of bringing out a model possibly in between the SI and Type R with HP in between the two. They were not sure if it was going to be a tuned 1.5 or a detuned 2.0 motor.