A　new　multirotor　aerial　vehicle　with　two　rotor　arms　formed　in　a　V-shape　configuration　is　introduced　in　this　paper.　To　figure　out　the　aerodynamic　interference　effects　between　rotors　as　an　implication　of　the　control　method,　this　paper　discusses　the　aerodynamic　performance　of　the　V8　Octorotor　MAV　with　different　rotor　spacing　using　both　experiments　and　simulations.　A　hovering　experiment　platform　is　applied　to　obtain　the　thrust,　power　consumption　and　rotational　speed.　PL　(power　loading)　is　promoted　to　characterize　the　aerodynamic　performance　of　the　V8　Octorotor　MAV.　The　velocity　vector,　streamline　and　turbulent　vortices＇　distribution　of　the　V8　Octorotor　MAV　are　presented　as　the　simulation　results,　which　indicates　that　turbulence　intensity　generated　by　the　MAV　dissipates　faster　in　a　large　rotor　spacing.　Therefore,　rotor　vibration　is　reduced　with　an　increased　hovering　stability,　and　the　power　loading　is　much　improved　at　G3　(1.2D-1.4D-1.6D-1.8D)　with　a　better　aerodynamic　performance　both　with　a　thrust　increment　and　power　decrement.