Tire pressure will make a big difference. A6 (C7 Platform) Discussion - Best tires for comfort - I have the original 20 tires on my 2013 A6 and dislike them, they seem to be pretty harsh ride and not too quiet. I've seen recommendations for Continental DWS and Michelin AS/3 as replacements, most seem to be commenting on the performance elements
Id say the C7 A6 Would be a fairer comparison, its just that much better so either the C7 or B9 choice is great over the B8.5. The B8 interior is ancient, even my 2005 C6 A6 had the same interior, and that car was better than the B8, the C7 has a beautiful interior but its ageing so if interior was that important the B9 is a no brainer.
Check first what firmware you have, look at the beginning of the name, and if you have for example HN+_EU_AU3G_P0432 you need to get newest firmware (which mostly means higher end number) which for this moment for above itβs HN+_EU_AU3G_K0942. Only Audi A6 C7 and Audi A8 D4 in their very first production year had firmware starting from HN+_XX
A6 (C7 Platform) Discussion - Check Engine Light On. Discussion Discussion forum for the C7 Audi A6 produced from 2011 - 2017 M015_Time Normal Mode: 8 s M019
the engines are the same, but to me the interior in the c7 is so much better and more modern. the c6 interior is old fashion long ago. i would get the c7. 2002 A6 2.7T APR tune. Bilstein shocks. HR springs. 18' b5 rs4 reps.
In general it is better to get the last model year of an outgoing design than the first of a new design. So the '16-'18 (also known as C7.5 and looks different than a C7 {just making sure you are aware}) will usually be the best/most reliable version of that design.
mXHv4. 273 471 142 268 81 102 197 170 157
audi a6 c7 s line vs normal