you guys are forgetting the main factor... the Driver... different skills, differents ways of driving... its about style about the driver..... also it depends on the track because both cars haves its advantages and disadvantges... i first of all i lean toward the supra.. its is my fav. car... i wanna get that clear but heres what i'm pointing out... if u race them on a circuit... the skyine is known for quick response, so around corners upshifting and downshift are almost perfect, no to mention the ABS and the 4WD that can pull away so quickly. But on the other hand the supra will probably spin out alot around the corners.. when the gas is punched coming out of a corner the supra with all the power and torque my drift a little becuz its also pushing that weight forward, cutting time and sometimes speed... its all RWD anyway too (gosh i love that car..heh) but if you put it on a drag strip, yes the skyline will pull off quicker, but also but it also takes only a little bit of time to bring out the torque and power of the Supra, and the supra will (more that likely) win at the last minute. -----
But also there is other factors affecting the performance.. as it how close it is to sea level... where the air is denser..so u can get more air into ur turbo or air - cold air intake... But most importantly....it all depends on the driver...