Think of the redesigned 2012 Audi A6 as an Audi A7 for the corner-office crowd.

While the audaciously styled four-passenger A7 boasts a head-swiveling fastback body, the new five-passenger A6, mechanically joined at the hip to A7, presents a more grown-up demeanor.

A7 wears disco duds. A6 wears a business suit. Kudos to the tailor.
Available as the turbocharged, four-cylinder, front-drive 2.0T or the supercharged, V-6, all-wheel drive 3.0T we sampled, A6 shows a face highlighted by the trademark Audi gape-mouth grille — a matter of taste — and marvelous, raptor-eye headlights, both shared with A7. Aft of the A-pillar, however, 6 gets conservatively buttoned-down with clean flanks, a back-on-its-haunches cabin and a sculpted rump with a striking license-plate overhang.