Originally Posted by
n8henn
When I bought mine, I looked at it like this. If you are not going to modify the car, the 4.2 is an option. However I wanted to modify and insisted on a manual 6-speed car then the 2.7tt is your only option. Not much tuning potential for the 4.2 and as others have said, the chains will fail at some point. Oh and no 6-speed 4.2 AR.
Meh, just supercharge the 4.2 and do a 6mt swap
. Lol!
I think the timing component job/issue is overblown. Sure it is a very real consideration and spending coin on preventive maintenance without power gains is a bummer. That said, how many 4.2 ar timing failures/issues have we seen? Once done, it is done.
Also, when you add up the real world cost to replace turbos (engine pull), clutch upgrade (when going bigger turbo), fueling, tune, etc...multiple timing belt jobs, it adds up quick. BUT, you have one badass audi at that point imo. So, I like both options frankly (currently own a b5 s4 2.7tt avant and 4.2 ar).
Following the jhm performance recipe for the b6/7 s4 with exhaust, tunes (ecu/tcu), intake mani, lwcp, lwr, and the 4.2 ar can be a fun formidable option, too.
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