On behalf of a colleague, is it likely that Jabba would be able to do much with the 2.5 V6 Diesel in the Audi A6?

190-200hp i beleive..

AmD do remaps for the 2.5 TDi, it does depend however on what version you have to start with. From what I understand remapping the 2.5 is quite tricky, it has a complicated ECU which uses to chips to run and work out commencement of injection (or something along those lines).

Give AMD or Jabba a call ?

When I was having my 150 V6 done, 185-190bhp was the maximum and slightly less for tiptronic . If its the 180bhp sport quattro A6 maybe 210bhp max without lots of smoke?