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

Detailed Review, Specifications & Comparison

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2019 Alfa Romeo Stelvio Quadrifoglio

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2019 Mercedes AMG GLC 63 Coupe

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Safety

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 Coupe 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 Coupe doesn’t offer a cross-path warning system.

Both the Stelvio Quadrifoglio and the AMG GLC 63 Coupe 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.

Engine

The Stelvio Quadrifoglio’s 2.9 turbo V6 produces 36 more horsepower (505 vs. 469) than the AMG GLC 63 Coupe’s standard 4.0 turbo V8. The Stelvio Quadrifoglio’s 2.9 turbo V6 produces 2 more horsepower (505 vs. 503) than the AMG GLC63 S Coupe’s standard 4.0 turbo V8.

Fuel Economy and Range

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

MPG

Stevlio Quadrifoglio

AWD

2.9 Turbo 6 cyl.

17 city/23 hwy

AMG GLC 63 Coupe

AWD

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 Coupe doesn’t offer a system that can shut down part of the engine.

Brakes and Stopping

The Stelvio Quadrifoglio stops shorter than the AMG GLC 63 Coupe:

Stelvio Quadrifoglio

AMG GLC 63 Coupe

70 to 0 MPH

155 feet

158 feet

Car and Driver

60 to 0 MPH

103 feet

105 feet

Motor Trend

Suspension and Handling

The Stelvio Quadrifoglio has a standard 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 AMG GLC 63 Coupe’s suspension doesn’t offer adjustable shock absorbers.

The Stelvio Quadrifoglio’s front to rear weight distribution is more even (52.9% to 47.1%) than the AMG GLC 63 Coupe’s (55.1% to 44.9%). This gives the Stelvio Quadrifoglio more stable handling and braking.

The Stelvio Quadrifoglio handles at .95 G’s, while the AMG GLC63 S Coupe pulls only .94 G’s of cornering force in a Car and Driver skidpad test.

For greater off-road capability the Stelvio Quadrifoglio has a 1.7 inches greater minimum ground clearance than the AMG GLC 63 Coupe (7.9 vs. 6.2 inches), allowing the Stelvio Quadrifoglio to travel over rougher terrain without being stopped or damaged. The Stelvio Quadrifoglio’s minimum ground clearance is 1.5 inches higher than on the AMG GLC63 S Coupe (7.9 vs. 6.4 inches).

Chassis

As tested by Car and Driver while cruising at 70 MPH, the interior of the Stelvio Quadrifoglio is quieter than the AMG GLC63 S Coupe (66 vs. 67 dB).

Passenger Space

The Stelvio Quadrifoglio has 3.1 inches more front headroom, .2 inches more front shoulder room, 1.3 inches more rear headroom and .2 inches more rear shoulder room than the AMG GLC 63 Coupe.

Cargo Capacity

The Stelvio Quadrifoglio has a larger cargo volume with its rear seat up than the AMG GLC 63 Coupe with its rear seat up (18.5 vs. 17.6 cubic feet). The Stelvio Quadrifoglio has a larger cargo volume with its rear seat folded than the AMG GLC 63 Coupe with its rear seat folded (56.5 vs. 49.4 cubic feet).

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

Stelvio Quadrifoglio

AMG GLC 63 Coupe

Length to seat (2nd/1st)

39.4”/72.5”

39.3”/59.6”

Max Width

46.5”

n/a

Min Width

36.7”

43.3”

Height

28”

27.4”

Ergonomics

To improve rear visibility by keeping the rear window clear, the Stelvio Quadrifoglio has a standard rear wiper. The AMG GLC 63 Coupe doesn’t offer a rear wiper.

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 Coupe 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 Coupe doesn’t offer a heated steering wheel.

Recommendations

Motor Trend performed a comparison test in its October 2018 issue and the Alfa Romeo Stelvio Quadrifoglio won out over the Mercedes AMG GLC63 S Coupe.

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

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