Blehhh. Engineer here. I understand what you're trying to say, it's just that you are incorrect in this case. The WRX and STi actually have very similar power levels no mater which way you want to measure it. They just do, as shown in the real world. Also, note that the 142 mph top speed of the WRX is electronically limited, not drag limited. If the difference between the two was as pronounced as you're claiming, then using the relationship of aerodynamic drag power being proportional to velocity cubed, then if 265 hp can only 142 mph, then that would mean that the STi would have to be putting down 364 hp to hit 158, which we all know is incorrect. If there really was a 40 hp difference between the two cars (which there's not) then at 150 mph, 40 hp equates to an 8 mph higher top speed.