I also have both and I drive both daily (gave my wife the I5). An I5 with 32s and ibtake mod gets off the line the same as my modded V8 (runnin 35s, slightly heavier wheels, sliders and lots of performance mods). However after Im running 25mph, the V8 is much more driveable (when I play with the throttle there is so much torque at hand while the I5 just becomes extremely loud!)