According to the source below the 2017 Civic Si will have 25% more torque and horsepower than the Civic touring.
http://www.torquenews.com/1574/honda-performance-fans-dis-10th-gen-civic-si-prior-market-arrival#comment-55922
This source attended the official unveiling and under this headline...
Hi Guys,
I watched the video posted by Hondata comparing the 10th Gen EX-T to a 9th Gen Si... I was a little skeptical... I'd like to see a run from a dead stop and from lower speeds, which no one has posted
So I decided to try each one for myself. The 9th Si is FUN, its engaging, I SO Enjoyed...