Certified Benz & Beemer Compares 2017 Infiniti QX50 VS 2017 Acura RDX Near Scottsdale, AZ

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2017 Infiniti QX50

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2017 Acura RDX

Safety Comparison

The QX50 offers an optional Around View® Monitor to allow the driver to see objects all around the vehicle on a screen. The RDX only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

Both the QX50 and the RDX have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, crash mitigating brakes, lane departure warning systems and blind spot warning systems.

Warranty Comparison

The QX50 comes with a full 4 year/60,000 mile basic warranty, which covers the entire truck and includes 24 hour roadside assistance. The RDX’s 4 year/50,000 mile basic warranty expires 10,000 miles sooner.

The QX50’s corrosion warranty is 2 years longer than the RDX’s (7 vs. 5 years).

Reliability Comparison

A hardened steel chain, with no maintenance needs, drives the camshafts in the QX50’s engine. A rubber belt that needs periodic replacement drives the RDX’s camshafts. If the RDX’s cam-drive belt breaks the engine could be severely damaged when the pistons hit the opened valves.

J.D. Power and Associates’ 2016 Initial Quality Study of new car owners surveyed provide the statistics that show that Infiniti vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Infiniti 12th in initial quality, above the industry average. With 19 more problems per 100 vehicles, Acura is ranked 24th, below the industry average.

Engine Comparison

The QX50’s 3.7 DOHC V6 produces 46 more horsepower (325 vs. 279) and 15 lbs.-ft. more torque (267 vs. 252) than the RDX’s 3.5 SOHC V6.

Fuel Economy and Range Comparison

The QX50 has 4 gallons more fuel capacity than the RDX (20 vs. 16 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

For better stopping power the QX50’s brake rotors are larger than those on the RDX:




Front Rotors

12.6 inches

12.3 inches

Rear Rotors

12.1 inches

12 inches

The QX50’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.

Tires and Wheels Comparison

For better traction, the QX50’s optional tires are larger than the largest tires available on the RDX (245/45R19 vs. 235/60R18).

The QX50’s standard tires provide better handling because they have a lower 55 series profile (height to width ratio) that provides a stiffer sidewall than the RDX’s standard 60 series tires. The QX50’s optional tires have a lower 45 series profile than the RDX’s 60 series tires.

For better ride, handling and brake cooling the QX50 offers optional 19-inch wheels. The RDX’s largest wheels are only 18-inches.

Suspension and Handling Comparison

For a smoother ride and more stable handling, the QX50’s wheelbase is 7.7 inches longer than on the RDX (113.4 inches vs. 105.7 inches).

The QX50’s front to rear weight distribution is more even (52.5% to 47.5%) than the RDX’s (59.8% to 40.2%). This gives the QX50 more stable handling and braking.

For better maneuverability, the QX50’s turning circle is 1.7 feet tighter than the RDX’s (37.2 feet vs. 38.9 feet). The QX50 AWD’s turning circle is .1 feet tighter than the RDX’s (38.8 feet vs. 38.9 feet).

Passenger Space Comparison

The front step up height for the QX50 is 3 inches lower than the RDX (16.2” vs. 19.2”). The QX50’s rear step up height is 3.3 inches lower than the RDX’s (16.2” vs. 19.5”).

Ergonomics Comparison

The QX50’s optional easy entry system raises the steering wheel and glides the driver’s seat back when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The RDX doesn’t offer an easy entry system.

To help drivers see further while navigating curves, the QX50 offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The RDX doesn’t offer cornering lights.

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