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Both the A8 and XJ have child safety locks to prevent children from opening the rear doors. The A8 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 XJ’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 A8 has a standard front seat center airbag, which deploys between the driver and front passenger, protecting them from injuries caused by striking each other in serious side impacts. The XJ doesn’t offer front seat center airbags.
The A8 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 XJ 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.
To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the A8. But it costs extra on the XJ.
A passive infrared night vision system optional on the A8 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 and even aims one of the vehicle’s headlights in the direction of the person or object. The XJ doesn’t offer a night vision system.
Both the A8 and the XJ have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.
The Audi A8 weighs 595 to 860 pounds more than the Jaguar XJ. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.
The A8’s corrosion warranty is 6 years longer than the XJ’s (12 vs. 6 years).
There are over 81 percent more Audi dealers than there are Jaguar dealers, which makes it much easier should you ever need service under the A8’s warranty.
J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Audi vehicles are better in initial quality than Jaguar vehicles. J.D. Power ranks Audi 25th in initial quality. With 43 more problems per 100 vehicles, Jaguar is ranked 30th.
J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Jaguar vehicles. J.D. Power ranks Audi 13th in reliability, above the industry average. With 18 more problems per 100 vehicles, Jaguar is ranked 20th.
The A8’s 3.0 turbo V6 hybrid produces 37 lbs.-ft. more torque (369 vs. 332) than the XJ’s standard 3.0 supercharged V6.
On the EPA test cycle the A8 gets better fuel mileage than the XJ AWD (19 city/27 hwy vs. 17 city/26 hwy).
Regenerative brakes improve the A8’s fuel efficiency by converting inertia back into energy instead of wasting it. The XJ doesn’t offer a regenerative braking system.
To lower fuel costs and make buying fuel easier, the Audi A8 uses regular unleaded gasoline (premium recommended for maximum performance). The XJ requires premium, which can cost 20 to 55 cents more per gallon.
For better stopping power the A8’s standard brake rotors are larger than those on the XJ:
For better traction, the A8 has larger standard tires than the XJ (255/45R19 vs. 245/45R19).
The front and rear suspension of the A8 uses air springs for a smoother, controlled ride than the XJ, which uses coil springs in front. Air springs maintain proper ride height and ride more smoothly.
The A8 offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Jaguar doesn’t offer an active suspension on the XJ.
For a smoother ride and more stable handling, the A8’s wheelbase is 3.7 inches longer than on the XJ (123.1 inches vs. 119.4 inches).
For better handling and stability, the track (width between the wheels) on the A8 is .7 inches wider in the front and 1.2 inches wider in the rear than on the XJ.
The A8 has 1.5 inches more front shoulder room, 1.3 inches more rear headroom, 5.4 inches more rear legroom and 1 inch more rear shoulder room than the XJ.
To make loading groceries and cargo easier when your hands are full, the A8’s trunk can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The XJ doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.
While the XJ Supercharged is not recommended to tow, any A8 can tow a minimum of 3500 pounds.
J.D. Power and Associates surveys of service recipients show that Audi service is better than Jaguar. J.D. Power ranks Audi third in service department satisfaction. With a 30% lower rating, Jaguar is ranked 15th.
The A8 offers an optional 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 XJ doesn’t offer a heads-up display.
To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the A8 has standard extendable sun visors. The XJ doesn’t offer extendable visors.
The A8 offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The XJ doesn’t offer a house-current electrical outlet.
The Audi A8/S8 outsold the Jaguar XJ by 15% during 2017.
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