Compare the2027 BMW X5 VS 2026 Acura RDX

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 RDX doesn’t offer pre-crash pretensioners.

The X5 has standard Active Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Head Restraints system moves the headrests forward to prevent neck and spine injuries. The RDX doesn’t offer a whiplash protection system.

The X5 has a standard PostCrash iBrake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The RDX 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.

Both the X5 and RDX have rear cross-traffic warning, but the X5 has Cross Traffic Warning with Braking (automatically applies the brakes) to better prevent a collision when backing near traffic. The RDX’s Rear Cross Traffic Monitor doesn’t automatically brake.

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 RDX doesn’t offer a driver alert monitor.

Both the X5 and the RDX have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, four-wheel antilock brakes, all-wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and available around view monitors.

The BMW X5 weighs 1158 to 1202 pounds more than the Acura RDX. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

The X5’s corrosion warranty is 7 years longer than the RDX’s (12 vs. 5 years).

BMW pays for scheduled maintenance on the X5 for 2 years and 24,000 miles longer than Acura pays for maintenance for the RDX (3/36,000 vs. 1/12000).

There are over 28 percent more BMW dealers than there are Acura dealers, which makes it easier should you ever need service under the X5’s warranty.

J.D. Power and Associates’ 2025 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Acura vehicles. With 2 fewer problems per 100 vehicles, JD Power ranks BMW higher than Acura.

J.D. Power and Associates’ 2025 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Acura vehicles. J.D. Power ranks BMW above average in long-term dependability. With 60 more problems per 100 vehicles in the first three years of ownership, Acura is rated below average.

From surveys of all its subscribers, Consumer Reports’ March 2026 Auto Issue reports that BMW vehicles are more reliable than Acura vehicles. Consumer Reports ranks BMW 2 places higher in reliability than Acura.

The X5’s 3.0 turbo 6-cylinder hybrid produces 122 more horsepower (394 vs. 272) and 148 lbs.-ft. more torque (428 vs. 280) than the RDX’s 2.0 turbo 4-cylinder.

On the EPA test cycle the X5 gets better mileage than the RDX:

			MPG
X5
		3.0 turbo 6-cyl. Hybrid	24 city/28 hwy
RDX
		2.0 turbo 4-cyl.	21 city/27 hwy
		A-Spec 2.0 turbo 4-cyl.	21 city/26 hwy

Regenerative brakes improve the X5’s fuel efficiency by converting inertia back into energy instead of wasting it. The RDX doesn’t offer a regenerative braking system.

The X5 has 4.8 gallons more fuel capacity than the RDX (21.9 vs. 17.1 gallons), for longer range between fill-ups.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the BMW X5 higher (6 out of 10) than the Acura RDX (5). This means the X5 produces up to 6.9 pounds less smog-producing pollutants than the RDX every 15,000 miles.

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 RDX doesn’t offer launch control.

The X5’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the RDX are solid, not vented.

For better traction, the X5 has larger tires than the RDX (F:255/50R21 & R:284/45R21 vs. 235/55R19).

The X5’s 255/50R21 front and 284/45R21 rear tires provide better handling because they have a lower 50 series front and 45 series rear profile (height to width ratio) that provides a stiffer sidewall than the RDX’s standard 55 series tires.

For better ride, handling and brake cooling the X5 has standard 21-inch wheels. Smaller 19-inch wheels are standard on the RDX. The X5’s optional 23-inch wheels are larger than the 20-inch wheels on the RDX A-Spec.

The X5 has a standard automatic load leveling suspension to keep ride height level with a heavy load or when towing. The RDX doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the X5’s wheelbase is 11.2 inches longer than on the RDX (119.5 inches vs. 108.3 inches).

For better handling and stability, the track (width between the wheels) on the X5 is 3.2 inches wider in the front and 2.8 inches wider in the rear than on the RDX.

The X5 has 1.1 inches more front headroom, 6.4 inches more front hip room, .3 inches more front shoulder room, 1.1 inches more rear headroom, 10.1 inches more rear hip room and 1.5 inches more rear shoulder room than the RDX.

For enhanced passenger comfort on long trips the X5’s rear seats recline. The RDX’s rear seats don’t recline.

The X5’s rear cargo window opens separately from the rest of the tailgate door to allow quicker loading of small packages. The RDX’s rear cargo window doesn’t open.

The X5’s standard towing capacity is much higher than the RDX’s (7710 vs. 1500 pounds).

Standard Trailer Stabilization Control on the X5 uses the Dynamic Stability Control sensors to detect trailer sway, then uses individual brakes to counteract any swaying and help keep the tow vehicle and trailer steady. The RDX doesn’t offer electronic trailer sway control.

The engine in the X5 is mounted longitudinally (North-South), instead of sideways, as in the RDX. This makes it easier to service and maintain, because the accessory belts are in front.

The X5’s standard Comfort Access allows you to unlock the doors from any outside door handle, open the cargo door, and start the engine, all without removing the key from pocket or purse. Smart Entry standard on the RDX doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear doors.

The X5’s optional power side swing out doors make it much easier to load and unload kids and cargo. One touch opens the door, before you even get to the sport utility. The RDX doesn’t offer a power rear door.

The X5’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 RDX’s standard intermittent wipers change speed with vehicle speed but can’t turn on and off or change speed based on changing rainfall.

To help drivers avoid possible obstacles, the X5 has standard cornering lights to illuminate around corners when the turn signals are activated. The RDX doesn’t offer cornering lights. The X5 also has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.

Manual rear side window sunshades are available in the X5 to help block heat and glare for the rear passengers. The RDX doesn’t offer rear side window sunshades.

The X5’s standard rear and side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The RDX has an automatic rear view mirror, but its side mirrors don’t dim.

The BMW X5 has power folding mirrors that offer unparalleled convenience while maneuvering in tight places or parked. With the mirrors folded it’s easier to walk past and help prevent parking damage. The mirrors can be quickly unfolded when the driver is ready to leave. Power folding mirrors are only offered on the RDX Advance.

The X5 has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the vehicle heater warms up. A heated steering wheel is only available on the RDX Advance.

The X5 offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the RDX.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW X5 has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the RDX. The X5 also offers Qi charging in the rear seat. The RDX doesn’t offer wireless charging in its rear seat.

The X5’s optional Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The RDX doesn’t offer an automated parking system.

The BMW X5 outsold the Acura RDX by over two to one during 2025.