Which is faster a 2012 mustang 5.0 or the 2008 mustang 427 roush or the 2012 mustang roush?
well the 2012 has 412 underated horepower and the 427 has a blown 3 valve with 427 at the crank, it has a roots type blower system, they are pretty equally matched but the 427 had a after market susp( sorta anyway). it could go either way with a good driver, thats stock, add any other part and this new four valve will hand a 3 valve its azz
