Son's Automotive Group Compares 2017 BMW X5 VS 2017 Porsche Cayenne Near Norcross, GA

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2017 BMW X5

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2017 BMW X5

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2017 Porsche Cayenne

Safety Comparison

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 Cayenne doesn’t offer a whiplash protection system.

A passive infrared night vision system optional on the X5 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 Cayenne doesn’t offer a night vision system.

The X5’s optional 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 Cayenne doesn’t offer a driver alert monitor.

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

Warranty Comparison

BMW pays for scheduled maintenance on the X5 for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Porsche doesn’t pay scheduled maintenance for the Cayenne.

There are over 82 percent more BMW dealers than there are Porsche dealers, which makes it much easier should you ever need service under the X5’s warranty.

Reliability Comparison

J.D. Power and Associates rated the X5 first among midsize premium SUVs in their 2016 Initial Quality Study. The Cayenne isn’t in the top three.

Engine Comparison

The X5’s 3.0 turbo diesel produces 118 lbs.-ft. more torque (413 vs. 295) than the Cayenne’s standard 3.6 DOHC V6.

Fuel Economy and Range Comparison

On the EPA test cycle the X5 xDrive35i gets better fuel mileage than the Cayenne S 3.6 twin turbo V6 (420 HP) (18 city/24 hwy vs. 17 city/24 hwy).

The X5 has 1.3 gallons more fuel capacity than the Cayenne S E-Hybrid’s standard fuel tank (22.4 vs. 21.1 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

The X5 stops shorter than the Cayenne:





60 to 0 MPH

110 feet

116 feet

Motor Trend

Tires and Wheels Comparison

The X5’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the Cayenne’s standard 55 series tires.

For better ride, handling and brake cooling the X5 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the Cayenne.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the X5 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Cayenne doesn’t offer run-flat tires.

Suspension and Handling Comparison

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

For a smoother ride and more stable handling, the X5’s wheelbase is 1.5 inches longer than on the Cayenne (115.5 inches vs. 114 inches).

The X5 xDrive50i xDrive executes Motor Trend’s “Figure Eight” maneuver quicker than the Cayenne (26.3 seconds @ .72 average G’s vs. 27.1 seconds @ .64 average G’s).

Chassis Comparison

The design of the BMW X5 amounts to more than styling. The X5 offers aerodynamic coefficients of drag from .32 to .34 Cd (depending on bodystyle and options). That is lower than the Cayenne (.35 to .36) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the X5 get better fuel mileage.

Passenger Space Comparison

The X5 offers optional seating for 7 passengers; the Cayenne can only carry 5.

The X5 has .9 inches more front headroom, 2 inches more front shoulder room, .6 inches more rear legroom and 1.6 inches more rear shoulder room than the Cayenne.

Cargo Capacity Comparison

The X5’s cargo area provides more volume than the Cayenne.




Third Seat Removed

35.8 cubic feet

23.6 cubic feet

Second Seat Folded

76.7 cubic feet

62.9 cubic feet

Ergonomics Comparison

The X5’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. An easy entry system costs extra on the Cayenne.

The X5 offers an optional heads-up display which projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Cayenne doesn’t offer a heads-up display.

If the windows are left down on the X5 the driver can raise them all using the key in the outside lock cylinder. On a hot day the driver can lower the windows from outside the vehicle using the key in the outside lock cylinder or the keyless remote. The driver of the Cayenne can only operate the windows from inside the vehicle, with the ignition on.

To improve rear visibility by keeping the rear window clear, the X5 has a standard rear variable intermittent wiper with a full on position. The rear wiper standard on the Cayenne only has an intermittent setting, so in a hard rain visibility isn’t as good.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the X5 has standard extendable sun visors. The Cayenne doesn’t offer extendable visors.

When the X5 is put in reverse, the passenger rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The Cayenne’s mirror doesn’t automatically adjust for backing.

The X5’s optional Parking Assistant can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Cayenne doesn’t offer an automated parking system.

Recommendations Comparison

The X5 is ranked first in its class and received the 2015 “Total Quality Award.” The Cayenne is not ranked.

The BMW X5 outsold the Porsche Cayenne by over three to one during the 2016 model year.

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