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The X5’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The RXL doesn’t offer pre-crash pretensioners.
The X5 has standard Active Protection, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The RXL 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 X5. But it costs extra on the RXL.
A passive infrared night vision system optional on the X5 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 RXL doesn’t offer a night vision system.
The X5’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The RXL doesn’t offer a driver alert monitor.
Both the X5 and the RXL have standard driver and passenger frontal airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras and available around view monitors.
The X5’s corrosion warranty is 6 years longer than the RXL’s (12 vs. 6 years).
BMW pays for scheduled maintenance on the X5 for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Lexus only pays for the first scheduled maintenance visit on the RXL.
There are over 43 percent more BMW dealers than there are Lexus dealers, which makes it easier should you ever need service under the X5’s warranty.
The X5 xDrive40i’s standard 3.0 turbo 6 cyl. produces 45 more horsepower (335 vs. 290) and 67 lbs.-ft. more torque (330 vs. 263) than the RX 350L’s standard 3.5 DOHC V6. The X5 xDrive40i’s 3.0 turbo 6 cyl. produces 27 more horsepower (335 vs. 308) than the RX 450hL’s standard 3.5 DOHC V6 hybrid. The X5 xDrive50i’s standard 4.4 turbo V8 produces 148 more horsepower (456 vs. 308) than the RX 450hL’s standard 3.5 DOHC V6 hybrid.
On the EPA test cycle the X5 gets better fuel mileage than the RXL:
19 city/26 hwy
20 city/26 hwy
18 city/25 hwy
Regardless of its engine, regenerative brakes improve the X5’s fuel efficiency by converting inertia back into energy instead of wasting it. Lexus only offers a regenerative brake system on the RXL Hybrid.
Regardless of its engine, the X5’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) Lexus only offers an automatic engine start/stop system on the RXL Hybrid.
The X5 has 4.7 gallons more fuel capacity than the RXL Hybrid’s standard fuel tank (21.9 vs. 17.2 gallons), for longer range between fill-ups. The X5 has 2.7 gallons more fuel capacity than the RXL’s standard fuel tank (21.9 vs. 19.2 gallons).
The X5’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 RXL doesn’t offer launch control.
For better traction, the X5 has larger standard tires than the RXL (265/50R19 vs. 235/65R18). The X5’s optional tires are larger than the largest tires available on the RXL (F:275/40R21 & R:315/35R21 vs. 235/65R18).
The X5’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the RXL’s standard 65 series tires. The X5’s optional 275/35R22 front and 315/30R22 rear tires have a lower 35 series front and 30 series rear profile than the RXL’s optional 55 series tires.
For better ride, handling and brake cooling the X5 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the RXL. The X5’s optional 22-inch wheels are larger than the 20-inch wheels optional on the RXL.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the X5 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The RXL doesn’t offer run-flat tires.
The X5 offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The RXL doesn’t offer an active sway bar system.
The X5 offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Lexus doesn’t offer an active suspension on the RXL.
For a smoother ride and more stable handling, the X5’s wheelbase is 7.3 inches longer than on the RXL (117.1 inches vs. 109.8 inches).
For better handling and stability, the track (width between the wheels) on the X5 is 1.7 inches wider in the front and 2.9 inches wider in the rear than on the RXL.
For greater off-road capability the X5 has a greater minimum ground clearance than the RXL (8.7 vs. 8.2 inches), allowing the X5 to travel over rougher terrain without being stopped or damaged.
The front grille of the X5 uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The RXL doesn’t offer active grille shutters.
The X5 has 1 inch more front headroom, 1.7 inches more front shoulder room, .2 inches more rear headroom, 6.5 inches more rear legroom and .3 inches more rear shoulder room than the RXL.
The X5 has a much larger cargo area with its rear seat folded than the RXL with its rear seat folded (72.3 vs. 70.7 cubic feet).
The X5’s rear cargo window opens separately from the rest of the tailgate door to allow quicker loading of small packages. The RXL’s rear cargo window doesn’t open.
The X5’s standard towing capacity is much higher than the RXL’s (6603 vs. 0 pounds). Maximum trailer towing in the Lexus RXL is only 3500 pounds. The X5 offers up to a 7209 lbs. towing capacity.
The engine in the X5 is mounted longitudinally (North-South), instead of sideways, as in the RXL. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.
The X5’s optional Parking Assistant can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The RXL doesn’t offer an automated parking system.
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