2020 Mercedes AMG GLC Coupe vs. 2020 Alfa Romeo Stelvio Quadrifoglio

Detailed Review, Specifications & Comparison

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2020 Mercedes AMG GLC Coupe

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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 Coupe 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 Coupe’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 Coupe 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 Coupe 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 Coupe’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 Coupe’s warranty.

Reliability

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/29

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 Coupe’s standard 4.0 turbo V8 produces 36 lbs.-ft. more torque (479 vs. 443) than the Stelvio Quadrifoglio’s 2.9 turbo V6. The AMG GLC 63 S Coupe’s standard 4.0 turbo V8 produces 73 lbs.-ft. more torque (516 vs. 443) than the Stelvio Quadrifoglio’s 2.9 turbo V6.

As tested in Motor Trend the AMG GLC 63 S Coupe is faster than the Alfa Romeo Stelvio Quadrifoglio:

AMG GLC

Stelvio Quadrifoglio

Zero to 30 MPH

1.1 sec

1.2 sec

Zero to 60 MPH

3.2 sec

3.5 sec

Zero to 80 MPH

5.5 sec

5.7 sec

Zero to 100 MPH

8.4 sec

9 sec

Passing 45 to 65 MPH

1.7 sec

1.8 sec

Quarter Mile

11.7 sec

12 sec

Speed in 1/4 Mile

116.5 MPH

114.4 MPH

Fuel Economy and Range

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/29

On the EPA test cycle the AMG GLC 43 Coupe 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 Coupe higher (5 out of 10) than the Alfa Romeo Stelvio Quadrifoglio (3). This means the AMG GLC Coupe 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 Coupe, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Stelvio Quadrifoglio.

The AMG GLC Coupe 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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For better stopping power the AMG GLC 63 Coupe’s front brake rotors are larger than those on the Stelvio Quadrifoglio:

AMG GLC 63

AMG GLC 63 S opt.

Stelvio

Stelvio opt.

Front Rotors

15.4 inches

15.8 inches

14.2 inches

15.4 inches

Tires and Wheels

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/29

For better traction, the AMG GLC 63 Coupe’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 Coupe’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 Coupe 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 Coupe 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 Coupe 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 Coupe 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 Coupe’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 Coupe’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 Coupe is 4.2 inches wider in the front and 1.9 inches wider in the rear than the track on the Stelvio Quadrifoglio.

The AMG GLC 63 S Coupe handles at .96 G’s, while the Stelvio Quadrifoglio pulls only .92 G’s of cornering force in a Motor Trend skidpad test.

The AMG GLC 63 S Coupe executes Motor Trend’s “Figure Eight” maneuver quicker than the Stelvio Quadrifoglio (24.1 seconds @ .85 average G’s vs. 24.9 seconds @ .79 average G’s).

Chassis

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As tested by Car and Driver, the interior of the AMG GLC 63 S Coupe is quieter than the Stelvio Quadrifoglio:

AMG GLC

Stelvio Quadrifoglio

At idle

40 dB

47 dB

Full-Throttle

78 dB

80 dB

Passenger Space

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/29

The AMG GLC Coupe has 4.2 inches more front legroom and 5.3 inches more rear legroom than the Stelvio Quadrifoglio.

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

Cargo Capacity

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/02/29

Pressing a switch automatically lowers the AMG GLC Coupe’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 Coupe’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 Coupe 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 Coupe 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 Coupe 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.

When the AMG GLC Coupe 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 Coupe 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 Coupe’s optional Active Parking Assist can parallel park or back into a parking spot 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.

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