the si in the 93-95 model years has the D16Z6 which has 125hp and the si in the 96-97 model years has the D16Y8 with 127hp. the S has 102hp? with the D15B7 in the 93-95 model years and the D16Y7 which has 106hp in the 96-97 model years. the vtec model had the B16A3 and has 160hp with a redline of around 8000-8200rpm.