thnx guys for the input ,base price diff, b/n the two is around 4-5000 pound.i have a4 avant 2.0 tdi (170 bhp) ,very much satisfied with the fuel economy.
with loded option will 2,7 cost 2000 pound. i think i ll go for the 2,7 .
just talked to my dealer and told me if i order now i may get the car after 6-http://www.a5oc.com/forums/images/smilies/mad.gif7 month ,that is a looong time

and he added if i order the audi tt 2.0 tdi will get it in july or august . i think i ll go for a5 2,7 tdi and tt tdi for the wife.