I thought the 4.2 had much lower rear end ratio than a 2.7t. I figure that 160 mph would come at about 6200 on my 2.7t which works out to a very slight difference in the final drive ratio. Maybe the 6 speed 2.7t has lower than 1:1 (overdrive) 6th gear while the S6/A6 in 5th are 1:1 or more. Does anyone know the rear end ratio of a 6 speed 2.7t and the ratio of 6th gear vs. the rear end ratio and of 5th on an A6 4.2. It sounds like, at least the S6, has a final engine to wheel ratio that is very close to the 2.7t.

2001 A6 2.7t
PST, and everything but cell phone.
2000 Lexus RX300 (wife)
1980 Triumph TR-8
previously
2000 A6 2.7t
1997 740il
Acura Integra
Subaru hatchback
2 Volvos
Datsun 510 w/ Buick 215 V8
Lotus Europa Twincam JPS
Triumph GT6+
Dodge 880 Wagon
Chevy Impala