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For enhanced safety, the front and rear seat shoulder belts of the Audi A6 Allroad have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Buick Regal TourX doesn’t offer pretensioners for the rear seat belts.
The A6 Allroad’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Regal TourX doesn’t offer pre-crash pretensioners.
Both the A6 Allroad and Regal TourX have child safety locks to prevent children from opening the rear doors. The A6 Allroad has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The Regal TourX’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
The A6 Allroad has a standard Secondary Collision Brake Assist, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Regal TourX doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
When descending a steep, off-road slope, the A6 Allroad’s standard Hill Descent Control allows you to creep down safely. The Regal TourX doesn’t offer Hill Descent Control.
A passive infrared night vision system optional on the A6 Allroad Prestige helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The Regal TourX doesn’t offer a night vision system.
The A6 Allroad has a standard Top and Corner View Cameras to allow the driver to see objects all around the vehicle on a screen. The Regal TourX only offers a rear monitor and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the front or sides.
Both the A6 Allroad and the Regal TourX have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, all-wheel drive, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available blind spot warning systems and rear cross-path warning.
The Audi A6 Allroad weighs 637 to 778 pounds more than the Buick Regal TourX. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.
For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the A6 Allroad its highest rating: “Top Pick Plus” for 2020, a rating granted to only 32 vehicles tested by the IIHS. The Regal TourX has not been fully tested, yet.
The A6 Allroad’s corrosion warranty is 6 years longer than the Regal TourX’s (12 vs. 6 years).
From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Audi vehicles are more reliable than Buick vehicles. Consumer Reports ranks Audi 4 places higher in reliability than Buick.
The A6 Allroad’s 3.0 turbo V6 hybrid produces 85 more horsepower (335 vs. 250) and 74 lbs.-ft. more torque (369 vs. 295) than the Regal TourX’s 2.0 turbo 4-cylinder.
Regenerative brakes improve the A6 Allroad’s fuel efficiency by converting inertia back into energy instead of wasting it. The Regal TourX doesn’t offer a regenerative braking system.
The A6 Allroad has 3 gallons more fuel capacity than the Regal TourX (19.3 vs. 16.3 gallons), for longer range between fill-ups.
The A6 Allroad offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The Regal TourX doesn’t offer an SMG or a conventional manual transmission.
The A6 Allroad’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The Regal TourX doesn’t offer launch control.
For better stopping power the A6 Allroad’s brake rotors are larger than those on the Regal TourX:
The A6 Allroad’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Regal TourX are solid, not vented.
For better traction, the A6 Allroad has larger tires than the Regal TourX (245/45R20 vs. 235/50R18).
The A6 Allroad’s tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Regal TourX’s standard 50 series tires.
For better ride, handling and brake cooling the A6 Allroad has standard 20-inch wheels. Only 18-inch wheels are available on the Regal TourX.
The A6 Allroad has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the Regal TourX; it requires you to depend on roadside assistance and your vehicle will have to be towed.
The A6 Allroad has a standard driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The Regal TourX’s suspension doesn’t offer adjustable shock absorbers.
For a smoother ride and more stable handling, the A6 Allroad’s wheelbase is 3.8 inches longer than on the Regal TourX (115.2 inches vs. 111.4 inches).
For better handling and stability, the track (width between the wheels) on the A6 Allroad is 2 inches wider in the front and .4 inches wider in the rear than on the Regal TourX.
For better maneuverability, the A6 Allroad Prestige w/All-Wheel Steering’s turning circle is 3.6 feet tighter than the Regal TourX’s (36.4 feet vs. 40 feet).
The A6 Allroad has .9 inches more front shoulder room, .5 inches more rear legroom and 1.1 inches more rear shoulder room than the Regal TourX.
For enhanced passenger comfort on long trips the A6 Allroad’s rear seats recline. The Regal TourX’s rear seats don’t recline.
Pressing a switch automatically lowers the A6 Allroad’s rear seats, to make changing between passengers and cargo easier. The Regal TourX doesn’t offer automatic folding seats.
A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the A6 Allroad. The Regal TourX doesn’t offer locking storage for small valuables.
The engine in the A6 Allroad is mounted longitudinally (North-South), instead of sideways, as in the Regal TourX. This makes it easier to service and maintain, because the accessory belts are in front.
The A6 Allroad’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. An easy entry system costs extra on the Regal TourX, and is not available on all models.
The A6 Allroad Prestige has a standard heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Regal TourX doesn’t offer a heads-up display.
The A6 Allroad’s front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The Regal TourX’s rear power window switches have to be held the entire time to close them fully.
If the windows are left open on the A6 Allroad the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Regal TourX can only operate the windows from inside the vehicle, with the ignition on.
The A6 Allroad’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The Regal TourX’s manually variable intermittent wipers have to be constantly adjusted.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The A6 Allroad has standard headlight washers to keep headlight output high. The Regal TourX doesn’t offer headlight washers.
While driving with high beams on, sensitive light sensors standard on the A6 Allroad detect other vehicles which could be blinded and automatically switch to low beams. The Regal TourX doesn’t offer automatic dimming high beams.
To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the A6 Allroad has standard extendable sun visors. The Regal TourX doesn’t offer extendable visors.
The A6 Allroad has standard heated front seats. Heated front seats are only available on the Regal TourX Essence. The A6 Allroad also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the Regal TourX.
Optional air-conditioned seats in the A6 Allroad keep the driver and front passenger comfortable and take the sting out of hot seats in Summer. The Regal TourX doesn’t offer air-conditioned seats.
The A6 Allroad has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel is only available on the Regal TourX Essence.
The A6 Allroad Prestige offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the Regal TourX.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi A6 Allroad has a standard wireless phone charging system (Qi) in the center console. Only the Regal TourX Essence offers wireless charging and it costs extra.
The A6 Allroad’s optional Park Steering Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Regal TourX doesn’t offer an automated parking system.
The Audi A6/S6 outsold the Buick Regal by 72% during 2019.
© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.
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