Hypotheitcal race - For f

What are the results of a 4 cylinder vs 6 cylinder vs 8 cylinder in a race, in a race where all cars are automatics (this way all you gotta do is hit the gas). Also all the HP is dynoes to be as close as possible (so weight reductions and gas amounts are as even as possible across the board. Who would win? What the ET's would be? What the top speed would be? What the fuel comsumption would be? Etc Etc. Mainly I wonder is their a simulation program out there that could calculate this, or does someone know from personal experience?