The B8 received a size bump of about 6 inches in wheelbase over the B7, with the A3 ready to take over small car duties the A4 had room to grow. The extended wheelbase allowed more interior room but also had a nice secondary effect of balancing the front to rear weight distribution a bit better, improving handling. An APR tune along with a high flow cat gives a nice bump to 287 HP / 341 TQ, for those looking for a bit more a K-04 turbo is also available.