Deciding to get rid of my A4 and get an A7 as I've always wanted one. A decent 3.0tfsi would be ideal but few about for around £25k so probably go for a 3 0tdi. As I love my toys there seems to be more 215bhp models with higher specs and in the black edition than there are 272bhp models with similar spec. So, with that in mind, what kind or realistic bhp increases would you expect to add to a 215bhp model? Just a simple remap without any mechanical modifications for example. Ta.