2020 Mercedes AMG GLC vs. 2020 Alfa Romeo Stelvio Quadrifoglio

Detailed Review, Specifications & Comparison

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2020 Alfa Romeo Stelvio Quadrifoglio

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Safety

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For enhanced safety, the front and rear seat shoulder belts of the Mercedes AMG GLC have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Alfa Romeo Stelvio Quadrifoglio doesn’t offer pretensioners for the rear seat belts.

The AMG GLC’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Stelvio Quadrifoglio doesn’t offer pre-crash pretensioners.

The AMG GLC offers an optional Surround View System to allow the driver to see objects all around the vehicle on a screen. The Stelvio Quadrifoglio 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 AMG GLC and the Stelvio Quadrifoglio have standard driver and passenger frontal airbags, front side-impact airbags, driver 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, blind spot warning systems, rearview cameras, available lane departure warning systems and rear cross-path warning.

Warranty

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The AMG GLC’s corrosion warranty is 1 year longer than the Stelvio Quadrifoglio’s (5 vs. 4 years).

There are over 2 times as many Mercedes dealers as there are Alfa Romeo dealers, which makes it much easier should you ever need service under the AMG GLC’s warranty.

Reliability

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J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Alfa Romeo vehicles. J.D. Power ranks Mercedes 12th in initial quality. With 24 more problems per 100 vehicles, Alfa Romeo is ranked 29th.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Mercedes vehicles are more reliable than Alfa Romeo vehicles. Consumer Reports ranks Mercedes 8 places higher in reliability than Alfa Romeo.

Engine

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The AMG GLC 63’s standard 4.0 turbo V8 produces 36 lbs.-ft. more torque (479 vs. 443) than the Stelvio Quadrifoglio’s 2.9 turbo V6.

Fuel Economy and Range

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On the EPA test cycle the AMG GLC 43 gets better fuel mileage than the Stelvio Quadrifoglio (18 city/24 hwy vs. 17 city/23 hwy).

Environmental Friendliness

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In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes AMG GLC higher (5 out of 10) than the Alfa Romeo Stelvio Quadrifoglio (3). This means the AMG GLC produces up to 16.5 pounds less smog-producing pollutants than the Stelvio Quadrifoglio every 15,000 miles.

Transmission

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A nine-speed automatic is standard on the Mercedes AMG GLC, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Stelvio Quadrifoglio.

The AMG GLC V8’s 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 Stelvio Quadrifoglio doesn’t offer launch control.

Brakes and Stopping

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The AMG GLC stops shorter than the Stelvio Quadrifoglio:

AMG GLC

Stelvio Quadrifoglio

70 to 0 MPH

154 feet

155 feet

Car and Driver

Tires and Wheels

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For better traction, the AMG GLC’s tires are larger than the largest tires available on the Stelvio Quadrifoglio (F:265/45R20 & R:295/40R20 vs. F:255/45R20 & R:285/40R20).

The AMG GLC’s optional 265/40R21 front and 295/35R21 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the Stelvio Quadrifoglio’s 45 series front and 40 series rear tires.

For better ride, handling and brake cooling the AMG GLC offers optional 21-inch wheels. The Stelvio Quadrifoglio’s largest wheels are only 20-inches.

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

The AMG GLC offers an optional space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the Stelvio Quadrifoglio, it requires you to depend on roadside assistance and your vehicle will have to be towed.

Suspension and Handling

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The front and rear suspension of the AMG GLC uses air springs for a smoother, controlled ride than the Stelvio Quadrifoglio, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The AMG GLC has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The AMG GLC’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The Stelvio Quadrifoglio doesn’t offer a load leveling suspension.

The AMG GLC’s drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Stelvio Quadrifoglio doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the AMG GLC’s wheelbase is 2.2 inches longer than on the Stelvio Quadrifoglio (113.1 inches vs. 110.9 inches).

For better handling and stability, the average track (width between the wheels) on the AMG GLC is 4.2 inches wider in the front and 2.2 inches wider in the rear than the track on the Stelvio Quadrifoglio.

Chassis

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As tested by Car and Driver while at idle, the interior of the AMG GLC 63 is quieter than the Stelvio Quadrifoglio (42 vs. 47 dB).

Passenger Space

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The AMG GLC has 4.2 inches more front legroom, 5.4 inches more rear legroom and .5 inches more rear shoulder room than the Stelvio Quadrifoglio.

For enhanced passenger comfort on long trips the AMG GLC’s rear seats recline. The Stelvio Quadrifoglio’s rear seats don’t recline.

Cargo Capacity

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Pressing a switch automatically lowers the AMG GLC’s rear seats, to make changing between passengers and cargo easier. The Stelvio Quadrifoglio doesn’t offer automatic folding seats.

Towing

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The AMG GLC’s standard towing capacity is much higher than the Stelvio Quadrifoglio’s (3500 vs. 3000 pounds).

Ergonomics

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Unlike the driver-only memory seat and mirrors in the Stelvio Quadrifoglio, the AMG GLC offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The AMG GLC offers an optional heads-up display that 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 Stelvio Quadrifoglio doesn’t offer a heads-up display.

If the windows are left open on the AMG GLC the driver can close them all at the outside door handle or from a distance using the remote (remote must be aimed at door sensor). On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Stelvio Quadrifoglio can only operate the windows from inside the vehicle, with the ignition on.

Manual rear side window sunshades are available in the AMG GLC to help block heat and glare for the rear passengers. The Stelvio Quadrifoglio doesn’t offer rear side window sunshades.

When the AMG GLC 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 Stelvio Quadrifoglio’s mirror doesn’t automatically adjust for backing.

Optional air-conditioned seats in the AMG GLC keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The Stelvio Quadrifoglio doesn’t offer air-conditioned seats.

The AMG GLC’s optional Active Parking Assist can parallel park by itself, starting and stopping automatically, with the driver only responsible for switching from reverse to drive. The Stelvio Quadrifoglio doesn’t offer an automated parking system.

Economic Advantages

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Insurance will cost less for the AMG GLC owner. The Complete Car Cost Guide estimates that insurance for the AMG GLC will cost $840 less than the Stelvio Quadrifoglio over a five-year period.

The AMG GLC will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the AMG GLC will retain 43.53% of its original price after five years, while the Stelvio Quadrifoglio only retains 41.79%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Mercedes AMG GLC will be $4719 less than for the Alfa Romeo Stelvio Quadrifoglio.

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