This is my 5th audi. The 4.2l is a rocket on wheels and my favorite so far. Engine has been maint. free other then the standard timing belt / water pump change ($800) at 80K. Break pads last ~40K. Minor non-driveability repairs. Window switch ($110) 2x failed, 5 min DIY repair. Front end torsion squeaks (>$1000). Expensive oil changes ($80). Center display is getting dim. Most fun daily driver I have ever owned. Unique body and interior of the 4.2l sets it far about the mundane 2.7Ts. Great in the snow. Almost as fast as my 911. Find a non-dealer Audi mech., I haven't met a dealer yet that will let me out of the service bay for <$1000 of questionable repairs.
310hp! Body style. Interior layout - at nighttime it looks like a jet fighter. Rear "bucket" type heated seats are popular.
Typical lack of German ability to get the cup holders correct. Nagging little electronics issues.