2020 Mercedes AMG C-Class Sedan vs. 2020 Alfa Romeo Giulia Quadrifoglio

Detailed Review, Specifications & Comparison

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2020 Mercedes AMG C-Class Sedan

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2020 Alfa Romeo Giulia Quadrifoglio

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Safety

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For enhanced safety, the front and rear seat shoulder belts of the Mercedes AMG C-Class Sedan 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 Giulia Quadrifoglio doesn’t offer pretensioners for the rear seat belts.

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

For enhanced safety, the front seat shoulder belts of the Mercedes AMG C-Class Sedan are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Alfa Romeo Giulia Quadrifoglio doesn’t offer height-adjustable seat belts.

The AMG C 43 Sedan has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Giulia Quadrifoglio doesn’t offer all-wheel drive.

The AMG C-Class Sedan offers an optional Surround View System to allow the driver to see objects all around the vehicle on a screen. The Giulia 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 C-Class Sedan and the Giulia Quadrifoglio have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, 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 C-Class Sedan’s corrosion warranty is 1 year longer than the Giulia 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 C-Class Sedan’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 C 63 Sedan’s standard 4.0 turbo V8 produces 36 lbs.-ft. more torque (479 vs. 443) than the Giulia Quadrifoglio’s 2.9 turbo V6. The AMG C 63 S Sedan’s standard 4.0 turbo V8 produces 73 lbs.-ft. more torque (516 vs. 443) than the Giulia Quadrifoglio’s 2.9 turbo V6.

Fuel Economy and Range

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The AMG C-Class Sedan has 2.1 gallons more fuel capacity than the Giulia Quadrifoglio (17.4 vs. 15.3 gallons), for longer range between fill-ups.

Transmission

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A nine-speed automatic (SMG) is standard on the Mercedes AMG C-Class Sedan, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Giulia Quadrifoglio.

The AMG C-Class Sedan offers an available sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The Giulia Quadrifoglio doesn’t offer an SMG or a conventional manual transmission.

The AMG C-Class Sedan 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 Giulia Quadrifoglio doesn’t offer launch control.

Brakes and Stopping

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For better stopping power the AMG C 63 S Sedan’s front brake rotors are larger than those on the Giulia Quadrifoglio:

AMG C 63 S Sedan

Giulia Quadrifoglio

Giulia Quadrifoglio

Front Rotors

15.8 inches

14.2 inches

15.4 inches

Tires and Wheels

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

Suspension and Handling

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The AMG C-Class Sedan’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 Giulia Quadrifoglio doesn’t offer drift compensation steering.

For better handling and stability, the average track (width between the wheels) on the AMG C-Class Sedan is 2 inches wider in the front than the track on the Giulia Quadrifoglio.

The AMG C 63 S Sedan handles at 1.01 G’s, while the Giulia Quadrifoglio pulls only .97 G’s of cornering force in a Motor Trend skidpad test.

Chassis

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As tested by Car and Driver, the interior of the AMG C 63 S Sedan is quieter than the Giulia Quadrifoglio:

AMG C-Class Sedan

Giulia Quadrifoglio

At idle

41 dB

48 dB

Full-Throttle

78 dB

80 dB

70 MPH Cruising

68 dB

68 dB

Passenger Space

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The AMG C-Class Sedan has 1.8 inches more front hip room, .1 inches more rear legroom, 3.5 inches more rear hip room and 1.4 inches more rear shoulder room than the Giulia Quadrifoglio.

Cargo Capacity

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The AMG C Sedan has a larger trunk than the Giulia Quadrifoglio (12.6 vs. 12 cubic feet).

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the AMG C-Class offers cargo security. The Giulia Quadrifoglio’s non-lockable remote release defeats cargo security.

To make loading and unloading groceries and cargo easier when your hands are full, the AMG C-Class Sedan’s power trunk can be opened or closed just by kicking your foot under the back bumper, leaving your hands completely free. The Giulia Quadrifoglio doesn’t offer a power or hands-free opening trunk.

Ergonomics

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Unlike the driver-only memory seat and mirrors in the Giulia Quadrifoglio, the AMG C-Class Sedan has standard driver and 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 C-Class Sedan 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 Giulia Quadrifoglio doesn’t offer a heads-up display.

If the windows are left open on the AMG C-Class Sedan the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Giulia Quadrifoglio can only operate the windows from inside the vehicle, with the ignition on.

Keyless-Go standard on the AMG C-Class Sedan allows you to unlock the doors, trunk and start the engine all without removing a key from pocket or purse. This eliminates searching for keys before loading groceries, getting in the vehicle in bad weather or making a hurried start to your trip. The Alfa Romeo Giulia Quadrifoglio’s Keyless-Go doesn’t unlock the trunk.

A power rear sunshade is optional in the AMG C-Class Sedan to help block heat and glare for the rear passengers. The Giulia Quadrifoglio doesn’t offer a rear sunshade.

When the AMG C-Class Sedan 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 Giulia Quadrifoglio’s mirror doesn’t automatically adjust for backing.

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

The AMG C-Class Sedan’s optional Active Parking Assist can parallel park by itself, starting, stopping and changing direction automatically. The Giulia Quadrifoglio doesn’t offer an automated parking system.

Model Availability

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The Mercedes AMG C-Class comes in coupe, convertible and sedan bodystyles; the Alfa Romeo Giulia Quadrifoglio isn’t available as a coupe or convertible.

Economic Advantages

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Insurance will cost less for the AMG C-Class Sedan owner. The Complete Car Cost Guide estimates that insurance for the AMG C-Class Sedan will cost $1795 to $2265 less than the Giulia Quadrifoglio over a five-year period.

The AMG C-Class Sedan will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the AMG C-Class Sedan will retain 44.57% to 44.61% of its original price after five years, while the Giulia Quadrifoglio only retains 38.19%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Mercedes AMG C-Class Sedan will be $4504 to $9840 less than for the Alfa Romeo Giulia Quadrifoglio.

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