Pecheles Automotive Compares 2018 Audi Q5 VS 2018 Acura RDX Near New Bern, NC

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2018 Audi Q5

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2018 Audi Q5

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2018 Acura RDX

Safety Comparison

The Q5’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 Q5 has standard Secondary Collision Brake Assist, which automatically apply 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.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the Q5. But it costs extra on the RDX.

The Q5 Prestige has a standard Top View Camera System 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 Q5 and the RDX have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems and rear cross-path warning.

Warranty Comparison

The Q5’s corrosion warranty is 7 years longer than the RDX’s (12 vs. 5 years).

Reliability Comparison

The Audi Q5’s engine uses a cast iron block for durability, while the RDX’s engine uses an aluminum block. Aluminum engine blocks are much more prone to warp and crack at high temperatures than cast iron.

The camshafts in the Q5’s engine are driven by a hardened steel chain, with no maintenance needs. The RDX’s camshafts are driven by a rubber belt that needs periodic replacement. If the RDX’s cam drive belt breaks the engine could be severely damaged when the pistons hit the opened valves.

From surveys of all its subscribers, Consumer Reports’ April 2017 Auto Issue reports that Audi vehicles are more reliable than Acura vehicles. Consumer Reports ranks Audi fourth in reliability. Acura is ranked 12th.

Engine Comparison

The Q5’s 2.0 turbo 4 cyl. produces 21 lbs.-ft. more torque (273 vs. 252) than the RDX’s 3.5 SOHC V6.

As tested in Car and Driver the Audi Q5 is faster than the Acura RDX:




Zero to 60 MPH

5.8 sec

6.2 sec

Quarter Mile

14.5 sec

14.8 sec

Fuel Economy and Range Comparison

On the EPA test cycle the Q5 Auto gets better fuel mileage than the RDX AWD (23 city/27 hwy vs. 19 city/27 hwy).

The Q5 has 2.5 gallons more fuel capacity than the RDX (18.5 vs. 16 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

For better stopping power the Q5’s brake rotors are larger than those on the RDX:




Front Rotors

13.3 inches

12.3 inches

Rear Rotors

13 inches

12 inches

The Q5’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 Q5 stops much shorter than the RDX:





70 to 0 MPH

161 feet

184 feet

Car and Driver

Tires and Wheels Comparison

For better traction, the Q5’s optional tires are larger than the largest tires available on the RDX (255/45R20 vs. 235/60R18).

The Q5’s optional 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 60 series tires.

For better ride, handling and brake cooling the Q5 offers optional 20-inch wheels. The RDX’s largest wheels are only 18-inches.

Suspension and Handling Comparison

The Q5 offers an available driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads or off-road. The RDX’s suspension doesn’t offer adjustable shock absorbers.

For a smoother ride and more stable handling, the Q5’s wheelbase is 5.3 inches longer than on the RDX (111 inches vs. 105.7 inches).

The Q5 Premium Plus handles at .81 G’s, while the RDX AWD pulls only .77 G’s of cornering force in a Car and Driver skidpad test.

For greater off-road capability the Q5 has a greater minimum ground clearance than the RDX (8.2 vs. 8.1 inches), allowing the Q5 to travel over rougher terrain without being stopped or damaged.

Passenger Space Comparison

The Q5 has 3 inches more front headroom and 1.2 inches more rear headroom than the RDX.

For enhanced passenger comfort on long trips the Q5’s rear seats recline. The RDX’s rear seats don’t recline.

Cargo Capacity Comparison

The Q5 has a larger cargo area than the RDX with its rear seat up (26.8 vs. 26.1 cubic feet).

To make loading groceries and cargo easier when your hands are full, the Q5 Premium Plus/Prestige’s cargo door can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The RDX doesn’t offer a hands-free gesture to open its cargo door, forcing you to put cargo down if your hands are full.

Ergonomics Comparison

The Q5 Prestige has a standard heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The RDX doesn’t offer a heads-up display.

The power windows standard on both the Q5 and the RDX have locks to prevent small children from operating them. When the lock on the Q5 is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The RDX prevents the driver from operating the other windows just as it does the other passengers.

The Q5’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The RDX’s rear power window switches have to be held the entire time to open or close them fully.

The Q5’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 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 Q5 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.

While driving with high beams on, sensitive light sensors available for the Q5 Prestige detect other vehicles which could be blinded and automatically switch to low beams. The RDX doesn’t offer automatic dimming high beams.

Both the Q5 and the RDX offer available heated front seats. The Q5 Premium Plus/Prestige also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the RDX.

On extremely cold winter days, the Q5 Premium Plus/Prestige’s optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the vehicle heater warms up. The RDX doesn’t offer a heated steering wheel.

Economic Advantages Comparison

Insurance will cost less for the Q5 owner. The Car Book by Jack Gillis rates the Q5 with a number “8” insurance rate while the RDX is rated higher at a number “10” rate.

According to The Car Book by Jack Gillis, the Q5 is less expensive to operate than the RDX because typical repairs cost much less on the Q5 than the RDX, including $413 less for a power steering pump.

Recommendations Comparison

Consumer Reports® recommends both the Audi Q5 and the Acura RDX, based on reliability, safety and performance.

The Audi Q5 outsold the Acura RDX by 762 units during the 2017 model year.

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