2019 Alfa Romeo Giulia Quadrifoglio vs. 2019 Mercedes AMG C 63 Sedan

Detailed Review, Specifications & Comparison

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2019 Alfa Romeo Giulia Quadrifoglio

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2019 Mercedes AMG C 63 Sedan

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Safety

Both the Giulia Quadrifoglio and the AMG C 63 Sedan 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, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, rear cross-path warning and available lane departure warning systems.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, with its optional front crash prevention system, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the Giulia Quadrifoglio the rating of “Top Pick” for 2018, a rating granted to only 104 vehicles tested by the IIHS. The AMG C 63 Sedan has not been tested, yet.

Engine

The Giulia Quadrifoglio’s 2.9 turbo V6 produces 36 more horsepower (505 vs. 469) than the AMG C 63 Sedan’s standard 4.0 turbo V8. The Giulia Quadrifoglio’s 2.9 turbo V6 produces 2 more horsepower (505 vs. 503) than the AMG C 63 S Sedan’s standard 4.0 turbo V8.

As tested in Car and Driver the Alfa Romeo Giulia Quadrifoglio is faster than the AMG C 63 S Sedan:

Giulia Quadrifoglio

AMG C 63 Sedan

Zero to 60 MPH

3.6 sec

3.9 sec

Zero to 100 MPH

8.1 sec

9.1 sec

5 to 60 MPH Rolling Start

4.2 sec

4.3 sec

Quarter Mile

11.9 sec

12.2 sec

Speed in 1/4 Mile

121 MPH

116 MPH

Top Speed

191 MPH

180 MPH

Fuel Economy and Range

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

Brakes and Stopping

The Giulia Quadrifoglio stops much shorter than the AMG C 63 Sedan:

Giulia Quadrifoglio

AMG C 63 Sedan

80 to 0 MPH

191 feet

206 feet

Road and Track

70 to 0 MPH

143 feet

156 feet

Car and Driver

60 to 0 MPH

110 feet

118 feet

Road and Track

Tires and Wheels

For better traction and acceleration, the Giulia Quadrifoglio has larger rear tires than the AMG C 63 Sedan (285/30R19 vs. 265/40R18).

The Giulia Quadrifoglio’s 245/35R19 front and 285/30R19 rear tires provide better handling because they have a lower 35 series front and 30 series rear profile (height to width ratio) that provides a stiffer sidewall than the AMG C 63 Sedan’s standard 40 series tires. The Giulia Quadrifoglio’s tires are lower profile than the AMG C 63 Sedan’s optional 35 series tires.

For better ride, handling and brake cooling the Giulia Quadrifoglio has standard 19-inch wheels. Smaller 18-inch wheels are standard on the AMG C 63 Sedan.

Suspension and Handling

For better handling and stability, the track (width between the wheels) on the Giulia Quadrifoglio is 2.4 inches wider in the rear than on the AMG C 63 Sedan.

The Giulia Quadrifoglio handles at 1.00 G’s, while the AMG C 63 S Sedan pulls only .97 G’s of cornering force in a Car and Driver skidpad test.

Chassis

The Giulia Quadrifoglio is 4.7 inches shorter than the AMG C 63 Sedan, making the Giulia Quadrifoglio easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver while at idle, the interior of the Giulia Quadrifoglio is quieter than the AMG C 63 S Sedan (48 vs. 52 dB).

Passenger Space

Because it has more passenger and cargo room, the EPA rates the Giulia Quadrifoglio a Mid-size car, while the AMG C 63 Sedan is rated a Compact.

The Giulia Quadrifoglio has 3.4 cubic feet more passenger volume than the AMG C 63 Sedan (95.4 vs. 92).

The Giulia Quadrifoglio has 1.5 inches more front headroom, .7 inches more front legroom, .8 inches more front shoulder room and .5 inches more rear headroom than the AMG C 63 Sedan.

Ergonomics

Heated windshield washer nozzles are standard on the Giulia Quadrifoglio to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The AMG C 63 Sedan doesn’t offer heated windshield washer nozzles.

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

Both the Giulia Quadrifoglio and the AMG C 63 Sedan offer available heated front seats. The Giulia Quadrifoglio also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the AMG C 63 Sedan.

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

Recommendations

Motor Trend performed a comparison test in its June 2017 issue and they ranked the Alfa Romeo Giulia Quadrifoglio first. They ranked the Mercedes AMG C 63 S Sedan fourth.

The Giulia Quadrifoglio was chosen as one of Car and Driver’s “Top Ten” in 2018. The AMG C 63 Sedan has never been a Car and Driver “Top Ten” pick.

Motor Trend selected the Giulia Quadrifoglio as their 2018 Car of the Year. The AMG C 63 Sedan has never been chosen.

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

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