2019 Alfa Romeo Stelvio Quadrifoglio vs. 2019 Mercedes AMG GLC 63

Detailed Review, Specifications & Comparison

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2019 Alfa Romeo Stelvio Quadrifoglio

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When descending a steep, off-road slope, the Stelvio Quadrifoglio’s standard Hill Descent Control allows you to creep down safely. The AMG GLC 63 doesn’t offer Hill Descent Control.

To help make backing safer, the Stelvio Quadrifoglio’s cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The AMG GLC 63 doesn’t offer a cross-path warning system.

Both the Stelvio Quadrifoglio and the AMG GLC 63 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, 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 and available lane departure warning systems.


The Stelvio Quadrifoglio’s 2.9 turbo V6 produces 36 more horsepower (505 vs. 469) than the AMG GLC 63’s 4.0 turbo V8.

As tested in Car and Driver the Alfa Romeo Stelvio Quadrifoglio is faster than the Mercedes AMG GLC 63:

Stelvio Quadrifoglio


Zero to 60 MPH

3.3 sec

3.6 sec

Zero to 100 MPH

8.4 sec

8.9 sec

5 to 60 MPH Rolling Start

4.3 sec

4.4 sec

Passing 50 to 70 MPH

2.6 sec

3.1 sec

Quarter Mile

11.8 sec

12 sec

Speed in 1/4 Mile

117 MPH

115 MPH

Top Speed

176 MPH

157 MPH

Fuel Economy and Range

On the EPA test cycle the Stelvio Quadrifoglio gets better fuel mileage than the AMG GLC 63:


Stevlio Quadrifoglio


2.9 Turbo 6 cyl.

17 city/23 hwy



4.0 Turbo V8

16 city/22 hwy

An engine control system that can shut down half of the engine’s cylinders helps improve the Stelvio Quadrifoglio’s fuel efficiency. The AMG GLC 63 doesn’t offer a system that can shut down part of the engine.

Brakes and Stopping

The Stelvio Quadrifoglio offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The AMG GLC 63 doesn’t offer ceramic brake rotors.

The Stelvio Quadrifoglio stops shorter than the AMG GLC 63:

Stelvio Quadrifoglio


70 to 0 MPH

155 feet

159 feet

Car and Driver

Suspension and Handling

The Stelvio Quadrifoglio’s front to rear weight distribution is more even (52.9% to 47.1%) than the AMG GLC 63’s (55.2% to 44.8%). This gives the Stelvio Quadrifoglio more stable handling and braking.

The Stelvio Quadrifoglio handles at .95 G’s, while the AMG GLC 63 pulls only .91 G’s of cornering force in a Car and Driver skidpad test.

For greater off-road capability the Stelvio Quadrifoglio has a 1.8 inches greater minimum ground clearance than the AMG GLC 63 (7.9 vs. 6.1 inches), allowing the Stelvio Quadrifoglio to travel over rougher terrain without being stopped or damaged.


As tested by Car and Driver while cruising at 70 MPH, the interior of the Stelvio Quadrifoglio is quieter than the AMG GLC 63 (66 vs. 71 dB).

Passenger Space

The Stelvio Quadrifoglio has 2.4 inches more front headroom, .2 inches more front shoulder room and .4 inches more rear headroom than the AMG GLC 63.

Cargo Capacity

The Stelvio Quadrifoglio has a larger cargo volume than the AMG GLC 63 with its rear seat up (18.5 vs. 17.6 cubic feet).

The Stelvio Quadrifoglio’s cargo area is larger than the AMG GLC 63’s in almost every dimension:

Stelvio Quadrifoglio


Length to seat (2nd/1st)



Max Width



Min Width







In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The Stelvio Quadrifoglio has standard headlight washers to keep headlight output high. The AMG GLC 63 doesn’t offer headlight washers.

On extremely cold winter days, the Stelvio Quadrifoglio’s standard (except w/Sparco Racing Seats) heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the vehicle heater warms up. The AMG GLC 63 doesn’t offer a heated steering wheel.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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