Compare the2024 Porsche Cayenne CoupeVS 2024 Acura RDX

Safety
Warranty
Reliability
Engine
Fuel Economy and Range
Transmission
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Towing
Servicing Ease
Ergonomics
Recommendations

Safety

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The Cayenne Coupe has a standard Multi-collision Brake System, 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.

Over 200 people are killed each year when backed over by motor vehicles. The Cayenne Coupe offers optional Maneuver Assist that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The RDX doesn’t offer backup collision prevention brakes.

A passive infrared night vision system optional on the Cayenne Coupe 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 RDX doesn’t offer a night vision system.

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

Both the Cayenne Coupe and the RDX 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, 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 Porsche Cayenne Coupe weighs 682 to 1705 pounds more than the Acura RDX. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

Warranty

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

Reliability

J.D. Power and Associates’ 2023 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Porsche above average in initial quality. With 40 more problems per 100 vehicles, Acura is rated below average.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Porsche vehicles are more reliable than Acura vehicles. J.D. Power ranks Porsche above average in long-term dependability. With 30 more problems per 100 vehicles in the first three years of ownership, Acura is rated below average.

Engine

The Cayenne Coupe’s standard 3.0 turbo V6 produces 76 more horsepower (348 vs. 272) and 88 lbs.-ft. more torque (368 vs. 280) than the RDX’s 2.0 turbo 4-cylinder. The Cayenne E-Hybrid Coupe’s standard 3.0 turbo V6 hybrid produces 191 more horsepower (463 vs. 272) and 199 lbs.-ft. more torque (479 vs. 280) than the RDX’s 2.0 turbo 4-cylinder. The Cayenne S Coupe’s standard 4.0 turbo V8 produces 196 more horsepower (468 vs. 272) and 162 lbs.-ft. more torque (442 vs. 280) than the RDX’s 2.0 turbo 4-cylinder. The Cayenne S E-Hybrid Coupe’s standard 3.0 turbo V6 hybrid produces 240 more horsepower (512 vs. 272) and 273 lbs.-ft. more torque (553 vs. 280) than the RDX’s 2.0 turbo 4-cylinder. The Cayenne Turbo E-Hybrid Coupe’s standard 4.0 turbo V8 hybrid produces 457 more horsepower (729 vs. 272) and 420 lbs.-ft. more torque (700 vs. 280) than the RDX’s 2.0 turbo 4-cylinder.

Fuel Economy and Range

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

The Cayenne Coupe S E-Hybrid/Turbo E-Hybrid’s standard fuel tank has 1.4 gallons more fuel capacity than the RDX (18.5 vs. 17.1 gallons), for longer range between fill-ups. The Cayenne Coupe’s standard fuel tank has 6.6 gallons more fuel capacity than the RDX (23.7 vs. 17.1 gallons).

Transmission

The Cayenne Coupe’s optional 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.

Brakes and Stopping

For better stopping power the Cayenne Coupe’s brake rotors are larger than those on the RDX:

	Cayenne Coupe	Cayenne Coupe CCB	RDX
Front Rotors	14.2 inches	17.3 inches	12.4 inches
Rear Rotors	13 inches	16.1 inches	12.2 inches

The Cayenne Coupe’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.

The Cayenne Coupe 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 RDX doesn’t offer ceramic brake rotors.

The Cayenne Coupe Turbo has standard air brakes, which adjust the spoiler automatically during high-speed braking in order to shorten stopping distances. The RDX doesn’t offer air brakes.

Tires and Wheels

For better traction, the Cayenne Coupe has larger standard tires than the RDX (F:255/55R20 & R:295/45R20 vs. 235/55R19). The Cayenne Coupe’s optional tires are larger than the largest tires available on the RDX (F:285/45R21 & R:315/40R21 vs. 255/45R20).

The Cayenne Coupe’s standard 295/45R20 rear tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the RDX’s standard 55 series tires. The Cayenne Coupe’s optional 285/40R22 front and 315/35R22 rear tires have a lower 40 series front and 35 series rear profile than the RDX A-Spec’s 45 series tires.

For better ride, handling and brake cooling the Cayenne Coupe has standard 20-inch wheels. Smaller 19-inch wheels are standard on the RDX. The Cayenne Coupe’s optional 22-inch wheels are larger than the 20-inch wheels on the RDX A-Spec.

Suspension and Handling

The Cayenne Coupe 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 RDX doesn’t offer an active sway bar system.

The Cayenne Coupe offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Acura doesn’t offer an active suspension on the RDX.

The Cayenne Coupe 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 Cayenne Coupe’s wheelbase is 5.7 inches longer than on the RDX (114 inches vs. 108.3 inches).

For better maneuverability, the Cayenne Turbo GT’s turning circle is .9 feet tighter than the RDX’s (38 feet vs. 38.9 feet).

For greater off-road capability the Cayenne Turbo E-Hybrid Coupe has a 1.3 inches greater minimum ground clearance than the RDX (9.5 vs. 8.2 inches), allowing the Cayenne Coupe to travel over rougher terrain without being stopped or damaged.

Chassis

The front grille of the Cayenne Coupe uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The RDX doesn’t offer active grille shutters.

Passenger Space

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

Towing

The Cayenne Coupe’s standard towing capacity is much higher than the RDX’s (7700 vs. 1500 pounds).

Standard trailer sway control on the Cayenne Coupe uses the Porsche Stability Management 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.

Servicing Ease

The engine in the Cayenne Coupe 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.

J.D. Power and Associates surveys of service recipients show that Porsche service is better than Acura. J.D. Power ranks Porsche third in service department satisfaction. With an 8% lower rating, Acura is ranked 6th.

Ergonomics

Unlike the driver-only memory system in the RDX, the Cayenne Coupe offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle and climate settings and the front passenger seat also adjusts to the new passenger’s preset preferences.

The Cayenne Coupe’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The RDX does not have an oil pressure gauge.

The Cayenne Coupe’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.

Heated windshield washer nozzles are standard on the Cayenne Coupe to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The RDX doesn’t offer heated windshield washer nozzles.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The Cayenne Coupe offers available headlight washers to keep headlight output high. The RDX doesn’t offer headlight washers.

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

To better shield the driver and front passenger’s vision, the Cayenne Coupe has standard dual-element sun visors that can block glare from two directions simultaneously. The RDX doesn’t offer secondary sun visors.

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

The Cayenne Coupe’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 Cayenne Coupe 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 Porsche Cayenne has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the RDX.

The Cayenne Coupe’s optional Active Parking Assistance can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. Remote ParkAssist will park and retrieve your car remotely: press a button and watch it park itself. This is ideal for tight locations. The RDX doesn’t offer an automated parking system.

Recommendations

Consumer Reports® recommends both the Porsche Cayenne Coupe and the Acura RDX, based on reliability, safety and performance.

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