I just looked in my car guide magazine, which has all the specs for all cars made in 2008. So it doesnt have the ZR1, but I know that was made off the 6.2L engine, not the 7.0L, so I took the weight of that, which is about 3,100 pounds, and the RX-8 is about 3,000 pounds, with the 1.3L rotory engine at about 242hp. While the vette has 625, but like I said unfair comparison...
And comparing the mustang to the RX-8 is also kind of unfair, as mazda is basically owned by ford... 33% at least, so why should Ford make there mustang compete against there partially owned RX-8, lol. They have a car in the tuner class, and a car in the muscle class. And the Gt, the first american super car.