around a solid 4 seconds. mabe a few tenths of a second more just depends on the car but yes it will most likely around 12 mpg in the city and like 16 or 17 mpg highway. and in this case yes it would beat down an m3 just depends on the m3 some of those little bastards are fast as fuck especially with a turbo or supercharger. however the mustang wil always be faster on a straight away but on a track its a different story. the m3 is meant to compete with the porshe and is built mainly for handleing. and they also rev extreamly fast.