I am SURE his car does not weigh 2900 lbs also. You can't argue dynamics and gravity. It takes X HP and X torque to get X amount of weight moving. It does not matter if it is an RX-7 or not.
I could drop another .3 by losing 200+ lbs.
and look at your own page :
The other extreme is also possible and usually occurs when you are using racing slick tires.