2019 Audi RS 3 vs. 2018 Mercedes AMG C 63 Sedan

Detailed Review, Specifications & Comparison

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Safety

For enhanced safety, the front and rear seat shoulder belts of the Audi RS 3 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 Mercedes AMG C 63 Sedan has only front height-adjustable seat belts.

The RS 3 has a standard Secondary Collision Brake Assist, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The AMG C 63 Sedan doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

The RS 3 has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The AMG C 63 Sedan doesn’t offer all-wheel drive.

Both the RS 3 and the AMG C 63 Sedan have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, 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.

Warranty

The RS 3’s corrosion warranty is 7 years longer than the AMG C 63 Sedan’s (12 vs. 5 years).

Reliability

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Audi 13th in reliability, above the industry average. With 6 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Audi vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Audi 10 places higher in reliability than Mercedes.

Engine

As tested in Car and Driver the Audi RS 3 is faster than the AMG C 63 S Sedan:

 

RS 3

AMG C 63 Sedan

Zero to 30 MPH

1.3 sec

1.5 sec

Zero to 60 MPH

3.5 sec

3.9 sec

Zero to 100 MPH

8.7 sec

9.1 sec

Quarter Mile

11.9 sec

12.2 sec

Speed in 1/4 Mile

117 MPH

116 MPH

Transmission

The RS 3 offers a standard 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 AMG C 63 Sedan doesn’t offer an SMG or a conventional manual transmission.

Brakes and Stopping

For better stopping power the RS 3’s standard front brake rotors are larger than those on the AMG C 63 Sedan:

 

RS 3

AMG C 63 Sedan

Front Rotors

14.6 inches

14.2 inches

The RS 3 stops shorter than the AMG C 63 Sedan:

 

RS 3

AMG C 63 Sedan

 

80 to 0 MPH

204 feet

206 feet

Road and Track

60 to 0 MPH

116 feet

118 feet

Road and Track

Tires and Wheels

For better traction, the RS 3’s optional front tires are larger than the largest tires available on the AMG C 63 Sedan (255/30R19 vs. 245/40R18).

The RS 3’s standard tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the AMG C 63 Sedan’s standard 40 series front tires. The RS 3’s optional 255/30R19 front tires have a lower 30 series profile than the AMG C 63 Sedan’s optional 35 series tires.

For better ride, handling and brake cooling the RS 3 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the AMG C 63 Sedan.

The RS 3 has a standard 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 AMG C 63 Sedan; it requires you to depend on roadside assistance and your vehicle will have to be towed.

Suspension and Handling

The RS 3 handles at .98 G’s, while the AMG C 63 S Sedan pulls only .97 G’s of cornering force in a Car and Driver skidpad test.

For better maneuverability, the RS 3’s turning circle is 1 foot tighter than the AMG C 63 Sedan’s (36.1 feet vs. 37.1 feet).

Chassis

The Audi RS 3 may be more efficient, handle and accelerate better because it weighs about 250 pounds less than the Mercedes AMG C 63 Sedan.

The RS 3 is 10.7 inches shorter than the AMG C 63 Sedan, making the RS 3 easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver while at idle, the interior of the RS 3 is quieter than the AMG C 63 S Sedan (42 vs. 52 dB).

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Audi service is better than Mercedes. J.D. Power ranks Audi third in service department satisfaction. With a 3% lower rating, Mercedes is ranked 6th.

Recommendations

The RS 3 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.

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

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