An auto Crossfire will beat a Auto RX8...
as stated before that the RX8 only out performs the Xfire when it is at the right RPMs...

Story time...

I've raced my friends RX8...
He's not so great with his shifting in the high revs yet... so it was like him SLAMMING the gas... shifting ... but much like an auto... when he redlights it but not enough to keep the RMPs high enough to continue to the next shift.... The xfire destroyed the RX8 from a 0 - 60 ...

now at ??? lets just say a high speed... the RX8 was able to pull away because its ported rotary engine system at high rpms...

Horse power isnt always everything... its about how the car is designed to handle its shifting... the RX8 is an amazing car when used correctly... but I'd put $100 on WMichael stomping a Rx8's booty at a SCCA race... and now with his ECU upgrade even off the line at a traffic light....