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Both the S8 and XJ have child safety locks to prevent children from opening the rear doors. The S8 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 S8 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 S8 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 S8. But it costs extra on the XJ.
A passive infrared night vision system optional on the S8 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 S8 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, lane departure warning systems, rearview cameras, available blind spot warning systems and rear cross-path warning.
The Audi S8 weighs 1146 to 1411 pounds more than the Jaguar XJ. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.
The S8’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 S8’s warranty.
J.D. Power and Associates’ 2019 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 22nd in initial quality. With 17 more problems per 100 vehicles, Jaguar is ranked 31st.
J.D. Power and Associates’ 2019 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 8th in reliability, above the industry average. With 44 more problems per 100 vehicles, Jaguar is ranked 25th.
The S8’s 4.0 turbo V8 hybrid produces 223 more horsepower (563 vs. 340) and 258 lbs.-ft. more torque (590 vs. 332) than the XJ’s standard 3.0 supercharged V6. The S8’s 4.0 turbo V8 hybrid produces 93 more horsepower (563 vs. 470) and 166 lbs.-ft. more torque (590 vs. 424) than the XJ Supercharged’s standard 5.0 supercharged V8. The S8’s 4.0 turbo V8 hybrid produces 73 lbs.-ft. more torque (590 vs. 517) than the XJR575’s standard 5.0 supercharged V8.
Regenerative brakes improve the S8’s fuel efficiency by converting inertia back into energy instead of wasting it. The XJ doesn’t offer a regenerative braking system.
For better stopping power the S8’s brake rotors are larger than those on the XJ:
The S8 offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The XJ doesn’t offer ceramic brake rotors.
For better traction, the S8 has larger tires than the XJ (265/40R20 vs. 245/45R19).
The S8’s standard tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the XJ’s standard 45 series front tires.
For better ride, handling and brake cooling the S8 has standard 20-inch wheels. Smaller 19-inch wheels are standard on the XJ. The S8’s optional 21-inch wheels are larger than the 20-inch wheels optional on the XJ.
The front and rear suspension of the S8 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.
For a smoother ride and more stable handling, the S8’s wheelbase is 3.8 inches longer than on the XJ (123.2 inches vs. 119.4 inches).
The S8 uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The XJ doesn’t offer active noise cancellation.
The S8 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.
A low lift-over trunk design makes loading and unloading the S8 easier. The S8’s trunk lift-over height is 27.4 inches, while the XJ’s liftover is 28.5 inches.
To make loading groceries and cargo easier when your hands are full, the S8’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.
J.D. Power and Associates surveys of service recipients show that Audi service is better than Jaguar. J.D. Power ranks Audi 8th in service department satisfaction (above the industry average). With a 32% lower rating, Jaguar is ranked 20th.
The S8 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 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 S8 has standard extendable sun visors. The XJ doesn’t offer extendable visors.
Power rear and rear side window sunshades are standard in the S8 to help block heat and glare for the rear passengers. The XJ doesn’t offer rear side window sunshades.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi S8 has a standard wireless phone charging system (Qi) in the center console. The XJ doesn’t offer wireless personal charging.
The S8 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.
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