The 92-93 b18a1 has 140hp as well. I don't know, could have something to do with them being obd1? I've heard everything from the exhaust mani to the cams is why... Who knows, but they make 140hp....

90-91......B18a1=130hp
92-93......B18a1=140hp
94-01......B18b=142hp

90-93 teg's= http://www.clubintegra.net/specs/90-93integra.html
94-01 teg's= http://www.clubintegra.net/specs/94-01integra.html