RX-8's are high 14 sec cars. But you gotta launch right

RX-8 work the same way S2k and all honda's work. They both rev high to make hp since hp = tq * RPM / 5252.

RX-8's low end sux just like honda's but its has a bad ass top end.

as for the kills

Mazda 3 - I believe it they are ass slow
Stock g35 coupe - I belive this one. G35 coupes are kinda heavy. But no way was this a 2006 model. You can forget it if it was a 2006.

Civic SI turbo what year the 99-00 coupe? they run low 15's with intake, exhaust and a dyno tuned vtec controller. And all hondas are known for its power from a roll

Vette - You pulled on a vette. more like he was giving you a head start just to toy with you.
SRT4 - he could of started in 5th floor it wait for the turbo lag and still beat you on a 40 roll.
Kawasaki 600 - You got the jump cuz he was not racing and then changed his mine as blew by you.