在等差数列{an}中,设其公差为d,由8a1+a4=0,得:8a1+a1+3d=0,即d=-3a1.则 S4 S2 = 4a1+ 4×(4?1)d 2 2a1+d = 4a1+6d 2a1+d = 4a1?18a1 2a1?3a1 =14.故选B.