An Estimated 500 hp :)
400 hp :}
13.5 HP
210hp
305 hp
307 hp.
VQ30DE engine with 190 HP
200
Non turbo, 160 HP
155 HP 160 TQ
98 brake horse power comes to mind but I am not sure.
Depending on which Altima and which SR20DET you're referring to. S13 SR20DET=205 hp S14 SR20DET=220 hp S15 SR20DET=247 hp