Originally Posted by Agamemnon
I was wondering the same thing about the transmission. If so, it is pretty impressive that the 8 AT can handle the torque. I see the diffs, drive shafts etc have been reinforced but it seems the transmission is what we have in our f30s. Since I was planning on a mild tune from Dinan when it becomes available, its good to know that the transmission can handle far more.
I'm pretty sure the ZF 8 can handle quite a lot of torque, Audi had to use it on the RS7/S8 because the S-Tronic DSG could not handle the torque of the 4.0 TFSI which is around 520 lb-ft in the highest state of factory tune.
I couldn't tell, but does this Alpina offer a LSD? It looks beastly, wonder about the cost.
Edit: According to Wikipedia
, there is a variant used in a Bentley capable of handling 900 lb-ft...holy crap that must be one hell of a torque converter!! I'd guess the 3 series shares the 8HP45 with the 1/5 series', which can handle about 450 lb-ft at the crank. Maybe someone has a better source than autoblog