the spec v is almost as fast as the xfire in 1/4 mile and 0-60. automatic xfire runs 7.1 0-60 and a15.2 1/4 mile where as the spec v runs a 7.2 0-60 and 15.3 1/4 mile, not much of a difference if u ask me. and the manual isnt that much faster 0-60 6.7 1/4 mile 14.7 an 04 maxima runs 6.3 0-60 and a 14.8 quarter mile, they are pretty close so its a drivers race...