As far as everything I read a GT-40 was 40 inches tall. I saw an original race prepped one at a car show and it had a measuring stick next to it that read 40 inches. So maybe they all lied i dunno. As far as the new 1 i don't think it will be 40 at the roof but probably pretty dam close. That's a lot lower than the rest listed and with mid engine it would be tought to ruin the handling. As for the fastest I figure it will get short changed after it goes into production like always. But as far as the numbers stated in the magazine articles and without a road test. I'd still have to say the GT-40 would be the best.