2019 Porsche 718 Boxster vs. 2019 Mercedes AMG C 63 Cabriolet

Detailed Review, Specifications & Comparison

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2019 Mercedes AMG C 63 Cabriolet

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Safety

Both the 718 Boxster and the AMG C 63 Cabriolet have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available crash mitigating brakes and blind spot warning systems.

Warranty

The 718 Boxster’s corrosion warranty is 7 years longer than the AMG C 63 Cabriolet’s (12 vs. 5 years).

Reliability

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Porsche fourth in initial quality, above the industry average. With 13 more problems per 100 vehicles, Mercedes is ranked 14th.

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Porsche vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Porsche second in reliability, above the industry average. With 47 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Porsche vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Porsche 6 places higher in reliability than Mercedes.

Engine

As tested in Car and Driver the 718 Boxster S is faster than the AMG C 63 Cabriolet S (automatics tested):

 

718 Boxster

AMG C 63

Zero to 60 MPH

3.7 sec

3.9 sec

Quarter Mile

11.9 sec

12.2 sec

The flat cylinder configuration of the boxer engine in the 718 Boxster lowers its center of gravity, enhancing handling stability. The AMG C 63 Cabriolet doesn’t offer a boxer engine configuration.

Fuel Economy and Range

On the EPA test cycle the 718 Boxster gets better fuel mileage than the AMG C 63 Cabriolet:

 

 

Boxster

AMG C 63

 

 

2.0 turbo 4 cyl./Manual

21 city/28 hwy

n/a

 

 

S 2.5 turbo 4 cyl./Manual

20 city/26 hwy

n/a

 

 

GTS 2.5 turbo 4 cyl./Manual

19 city/25 hwy

n/a

 

 

2.0 turbo 4 cyl./Auto

22 city/29 hwy

17 city/24 hwy

4.0 twin turbo V8

 

S 2.5 turbo 4 cyl./Auto

21 city/28 hwy

17 city/24 hwy

4.0 twin turbo V8 S

 

GTS 2.5 turbo 4 cyl./Auto

20 city/26 hwy

n/a

 

Regenerative brakes improve the 718 Boxster’s fuel efficiency by converting inertia back into energy instead of wasting it. The AMG C 63 Cabriolet doesn’t offer a regenerative braking system.

Brakes and Stopping

The 718 Boxster stops much shorter than the AMG C 63 Cabriolet:

 

718 Boxster

AMG C 63 Cabriolet

 

70 to 0 MPH

143 feet

155 feet

Car and Driver

Tires and Wheels

For better ride, handling and brake cooling the 718 Boxster offers optional 20-inch wheels. The AMG C 63 Cabriolet’s largest wheels are only 19-inches in the front and 20-inches in the rear.

Suspension and Handling

The 718 Boxster S handles at 1.04 G’s, while the AMG C 63 Cabriolet S pulls only .97 G’s of cornering force in a Car and Driver skidpad test.

For better maneuverability, the 718 Boxster’s turning circle is 1 foot tighter than the AMG C 63 Cabriolet’s (36.1 feet vs. 37.1 feet).

Chassis

The Porsche 718 Boxster may be more efficient, handle and accelerate better because it weighs about 1150 to 1300 pounds less than the Mercedes AMG C 63 Cabriolet.

The 718 Boxster is 1 foot, 2.7 inches shorter than the AMG C 63 Cabriolet, making the 718 Boxster easier to handle, maneuver and park in tight spaces.

Passenger Space

The 718 Boxster has .5 inches more front headroom and 1 inch more front legroom than the AMG C 63 Cabriolet.

Cargo Capacity

The 718 Boxster has a much larger trunk than the AMG C 63 Cabriolet with its top down (9.7 vs. 7 cubic feet). The 718 Boxster has a larger trunk than the AMG C 63 Cabriolet with its top up (9.7 vs. 8.8 cubic feet).

To make loading groceries and cargo easier when your hands are full, the 718 Boxster’s available trunk can be opened just by holding your hand near the emblem on the trunk, leaving your hands completely free. The AMG C 63 Cabriolet doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Servicing Ease

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

Ergonomics

The 718 Boxster’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The AMG C 63 Cabriolet does not have an oil pressure gauge.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The 718 Boxster offers available headlight washers to keep headlight output high. The AMG C 63 Cabriolet doesn’t offer headlight washers.

On extremely cold winter days, the 718 Boxster’s optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The AMG C 63 Cabriolet doesn’t offer a heated steering wheel.

Recommendations

Consumer Reports® recommends the Porsche 718 Boxster, based on reliability, safety and performance.

The Boxster was chosen as one of Car and Driver’s “Top Ten” for 14 of the last 14 years. The AMG C 63 Cabriolet has never been a Car and Driver “Top Ten” pick.

The 718 Boxster was chosen as one of Automobile Magazine’s “All Stars” for 10 of the last 19 years. The AMG C 63 Cabriolet has never been an “All Star.”

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

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