ive owned both, an A4 with 2.73s and an M6 with 3.42s. I feel like my M6 has more power and it is also a lot more fun to drive. Stock for stock the M6 is faster if your a decent driver but with a high enough stall converter the A4 can be just as faster if not faster
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"Don't Think, Just Replace Opti"
1996 Firebird Formula M6 Black/Ebony
K&N CAI, Flowmaster Catback Exhaust, MGW Short Shifter, DMH cutout, UMI STB and SFC's, LS1 Front Brakes, Tune by Madtuner
1995 Cherokee Sport 4.0L - Stock...for now
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