Certified Benz & Beemer Compares 2017 Acura MDX VS 2017 Infiniti QX80 Near Phoenix, AZ

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2017 Acura MDX

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2017 Infiniti QX80

Safety Comparison

The Acura MDX has Daytime Running Lights to help keep it more visible under all conditions. Canadian government studies show that driving with lights during the day reduces accidents by 11% by making vehicles more conspicuous. The QX80 doesn’t offer Daytime Running Lights.

For better protection of the passenger compartment, the MDX uses safety cell construction with a three-dimensional high-strength frame that surrounds the passenger compartment. It provides extra impact protection and a sturdy mounting location for door hardware and side impact beams. The QX80 uses a body-on-frame design, which has no frame members above the floor of the vehicle.

Both the MDX and the QX80 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, rearview cameras, available all wheel drive, blind spot warning systems, around view monitors and rear cross-path warning.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, with its optional front crash prevention system, and its headlight’s “Acceptable” rating, the Insurance Institute for Highway Safety grants the MDX its highest rating: “Top Pick Plus” for 2017, a rating granted to only 54 vehicles tested by the IIHS. The QX80 has not been tested, yet.

Warranty Comparison

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

Reliability Comparison

The engines in the MDX have a single overhead cam for simplicity. The engine in the QX80 has dual overhead cams, which add to the number of moving parts and the complexity of the cylinder heads.

J.D. Power and Associates’ 2016 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Acura vehicles are more reliable than Infiniti vehicles. J.D. Power ranks Acura 8th in reliability, above the industry average. With 7 more problems per 100 vehicles, Infiniti is ranked 13th.

Engine Comparison

As tested in Car and Driver the Acura MDX 3.5 V6 is faster than the Infiniti QX80:




Zero to 60 MPH

5.9 sec

6.5 sec

Zero to 100 MPH

16.4 sec

17.8 sec

5 to 60 MPH Rolling Start

6.2 sec

6.7 sec

Quarter Mile

14.6 sec

15.1 sec

Speed in 1/4 Mile

95 MPH

94 MPH

Fuel Economy and Range Comparison

On the EPA test cycle the MDX Sport Hybrid gets better fuel mileage than the QX80 AWD (26 city/27 hwy vs. 13 city/19 hwy).

On the EPA test cycle the MDX gets better fuel mileage than the QX80:








20 city/27 hwy





19 city/27 hwy

14 city/20 hwy




19 city/26 hwy





18 city/26 hwy

13 city/19 hwy


An engine control system that can shut down half of the engine’s cylinders helps improve the MDX’s fuel efficiency. The QX80 doesn’t offer a system that can shut down part of the engine.

Regenerative brakes improve the MDX Sport Hybrid’s fuel efficiency by converting inertia back into energy instead of wasting it. The QX80 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the MDX offers an optional system to automatically turn off the engine when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The QX80 doesn’t offer an automatic engine start/stop system.

The MDX has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The QX80 doesn’t offer a cap-less fueling system.

Brakes and Stopping Comparison

The MDX stops shorter than the QX80:





60 to 0 MPH

121 feet

130 feet

Motor Trend

60 to 0 MPH (Wet)

140 feet

155 feet

Consumer Reports

Tires and Wheels Comparison

The MDX has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The QX80 doesn’t offer vehicle monitored tire inflation.

Suspension and Handling Comparison

The MDX 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 QX80’s suspension doesn’t offer adjustable shock absorbers.

The MDX SH-AWD handles at .82 G’s, while the QX80 AWD pulls only .72 G’s of cornering force in a Car and Driver skidpad test.

The MDX SH-AWD executes Motor Trend’s “Figure Eight” maneuver 1.6 seconds quicker than the QX80 AWD (27 seconds @ .65 average G’s vs. 28.6 seconds @ .57 average G’s).

For better maneuverability, the MDX Sport Hybrid’s turning circle is 3.2 feet tighter than the QX80’s (38.4 feet vs. 41.6 feet). The MDX’s turning circle is 2.9 feet tighter than the QX80’s (38.7 feet vs. 41.6 feet).

Chassis Comparison

The Acura MDX may be more efficient, handle and accelerate better because it weighs about 1400 to 1650 pounds less than the Infiniti QX80.

The MDX is 1 foot shorter than the QX80, making the MDX easier to handle, maneuver and park in tight spaces.

The MDX is 8.4 inches shorter in height than the QX80, making the MDX much easier to wash and garage and drive (lower center of gravity).

Unibody construction makes the MDX’s chassis much stiffer, which contributes to better handling, and enables softer springs to be used for a better ride. Unibody construction’s stiffness also contributes to better durability and less body squeaks and rattles. The QX80 doesn’t use unibody construction, but a body-on-frame design.

To almost totally eliminate engine vibration in the passenger area, the MDX Sport Hybrid has an electronically controlled liquid-filled front engine mount. A computer-controlled electric current in the liquid changes its viscosity, allowing the mount to dampen the engine completely at all RPMs. The QX80 uses conventional solid rubber engine mounts.

The MDX uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The QX80 doesn’t offer active noise cancellation.

Passenger Space Comparison

The front step up height for the MDX is 3.4 inches lower than the QX80 (19” vs. 22.4”). The MDX’s rear step up height is 5.4 inches lower than the QX80’s (17.4” vs. 22.8”).

Cargo Capacity Comparison

A low lift-over cargo hatch design makes loading and unloading the MDX easier. The MDX’s cargo hatch lift-over height is 31.5 inches, while the QX80’s liftover is 34 inches.

Ergonomics Comparison

The MDX offers an optional heads-up display that projects speed readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The QX80 doesn’t offer a heads-up display.

Standard smartphone integration for the MDX allows the driver and passengers access to select programs on their smartphones, including reading text messages aloud, playing internet radio stations and other connected activities without taking their eyes off the road or their hands from the wheel. The QX80 doesn’t offer factory integrated smartphone program access.

Economic Advantages Comparison

According to The Car Book by Jack Gillis, the MDX is less expensive to operate than the QX80 because it costs $144 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the MDX than the QX80, including $12 less for front brake pads, $117 less for fuel injection, $81 less for a fuel pump, $257 less for front struts, $1027 less for a timing belt/chain and $130 less for a power steering pump.

Recommendations Comparison

The Acura MDX has won recognition from these important consumer publications:




Consumer Reports® Recommends



Car Book “Best Bet”



The Acura MDX outsold the Infiniti QX80 by over three to one during the 2016 model year.

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