Thanks to throttle recalibrations and engine tuning, overall acceleration with the base engine is satisfying. Performance is swifter yet from the A6 2.7T and A6 4.2 sedans. The continuously variable automatic transmission (CVT), available in the 3.0, sharpens throttle response at high engine speeds vs. conventional automatic. Audi claimed 0-60 mph acceleration times below 7 seconds for each of the performance editions, and we wouldn't dispute those figures. They easily rank among the faster cars in the near-luxury class. Fuel economy is good for a near-luxury car. We averaged 22.4 mpg in a front-drive sedan. Heavier weight makes the Quattro editions somewhat less frugal. Firm steering--especially in S6 models--communicates well in turns and helps the car head effortlessly down interstates and straightaways. Few front-wheel drive midsize sedans corner with more poise or grip than an A6. The penalty is a suspension that glides over rough pavement centers, but notices nearly every small bump and tar strip, making for a "busy" ride on many surfaces. On the plus side, the ride is generally supple and quiet. Brakes are strong, with neatly progressive pedal feel. Wind noise is very slight, but tires thump and whine. Limited-production RS6 is for the hard-core performance fan only. The ride is rough, noise levels much higher, and acceleration neck-snapping. As for the interior, the A6 cabin is a breezy, sophisticated blend of color-matched surfaces and walnut trim, joined by touches of brightwork on the dashboard, doors, and console. The sedan is roomier than competitive BMW 5-Series or Mercedes-Benz E-Class models. Occupants enjoy an abundance of head, shoulder, and leg room. In back is a supportive bench seat that promises plenty of knee clearance, toe space, and head room. The wagon's 2-place rear seat is sized for preteens. Outside mirrors are small enough to hamper lane changes, but visibility otherwise is quite good. It's even better in the glassy wagon, which also boasts good load-carrying ability. Trunk space is cavernous and easily accessible. Interior storage is also plentiful, including map pockets on every door. Workmanship and materials are top-notch throughout. Panel gaps are precise, inside and out.

Value for the Money
New or used, an A6 costs a lot less than a comparable BMW 528i or Mercedes-Benz E320, yet delivers a similar sense of Teutonic solidity and driving feel. Audi's allroad wagon brings the ride and comfort of an SUV into the mix without sacrificing sophisticated onroad capability. The A6 is a well-made machine that performs admirably on the road. All told, we recommend these great German machines highly, despite their relatively high prices.