Car comparison

Porsche 718 Cayman (982) GT4 RS 4.0vsMercedes-Benz C-class Coupe (C205) · Facelift 2018 AMG C 63 S V8

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

Porsche 718 Cayman (982)

GT4 RS 4.0

493 hp3996 ccGasolineRWDDual-clutchNaturally aspiratedCoupe2022-present
VS

Mercedes-Benz C-class Coupe (C205) · Facelift 2018

AMG C 63 S V8

510 hp3982 ccGasolineRWDAutomaticTwin-turboCoupe2018-2023

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8

  • Most powerful
    510 hp
    380 kW
  • Highest torque
    700 Nm
    516 lb-ft
  • Lowest combined fuel consumption
    10.1 L/100 km
    23.3 mpg US
    28.0 mpg UK
  • Best estimated range
    653 km
    406 mi
  • Largest trunk
    355 L
  • Best overall score
    77/100
  • Best performance score
    90/100
  • Best economy score
    80/100
  • Best practicality score
    50/100

Specification comparison

Specification comparison
ModelPorsche718 Cayman (982)GT4 RS 4.0Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
Power
493hp368kW
510hp380kW
Torque
449Nm331lb-ft
700Nm516lb-ft
Curb weight
1,464kg3,228lb
1,745kg3,847lb
Gross weight
1,771kg3,904lb
2,160kg4,762lb
Top speed
315 km/h
196 mph
Unrestricted
305 km/h190 mph
Restricted
290 km/h180 mph
Calculated
To 99% top speed
48.6s99% target: 312 km/h / 194 mph
Calculated
56.7s99% target: 302 km/h / 188 mph
Calculated
0-100 km/h
3.4s
3.9s
0-200 km/h
9.6s
Calculated
11.5s
Calculated
0-60 mph
3.3s
Calculated
3.7s
Calculated
Fuel consumption
12.3L/100 km19.1mpg US23.0mpg UK
10.1L/100 km23.3mpg US28.0mpg UK
Fuel consumption city-
14L/100 km16.8mpg US20.2mpg UK
Fuel consumption highway-
7.8L/100 km30.2mpg US36.2mpg UK
Quarter mile
11.0s
Calculated
11.7s
Calculated
Power-to-weight
337hp/t251kW/t153hp/1000 lb
Calculated
292hp/t218kW/t133hp/1000 lb
Calculated
Torque-to-weight
307Nm/t205lb-ft/ton
Calculated
401Nm/t268lb-ft/ton
Calculated
Estimated range
520km323mi
Calculated
653km406mi
Calculated
Displacement
3,996cc244cu in
3,982cc243cu in
Length
4,455mm175in
4,751mm187in
Width
1,822mm72in
1,877mm74in
Height
1,267mm50in
1,401mm55in
Wheelbase
2,484mm98in
2,840mm112in
Front track-
1,636mm64in
Ground clearance
102mm4in
101mm4in
Trunk volume-
355L
Max trunk volume
136L
-
Doors
2
2
Seats
2
4
Fuel tank
64L
66L
CO2 emissions-
230g/km

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

Porsche 718 Cayman (982) GT4 RS 4.0Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8PowerTorque
  • Porsche 718 Cayman (982) GT4 RS 4.0: Power / Torque
  • Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche718 Cayman (982)GT4 RS 4.08,400 rpm6,250 rpm9,000 rpm
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V85,500-6,250 rpm2,000-4,500 rpm6,500 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche718 Cayman (982)GT4 RS 4.0Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.3 s
3.7 s
0-100 km/h
0-62 mph
3.4 s
3.9 s
0-200 km/h
0-124 mph
9.6 s
11.5 s
Top speed
315 km/h
196 mph
Unrestricted
305 km/h190 mph
Restricted
290 km/h180 mph
Likely limited
Drag race simulation
60 ft
18 m
1.9 s
2.0 s
330 ft
101 m
4.9 s
5.2 s
1/8 mile
201 m
7.3 s
7.7 s
1000 ft
305 m
9.3 s
9.9 s
1/4 mile
402 m
11.0 s
11.7 s
Trap speed
1/4 mile
402 m
215 km/h
134 mph
202 km/h
126 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.0
493 hp
368 kW
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
510 hp
380 kW

Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8 has 17 hp more than Porsche 718 Cayman (982) GT4 RS 4.0.

The biggest power difference is between Porsche 718 Cayman (982) GT4 RS 4.0 and Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8: 17 hp (13 kW).

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.0
449 Nm
331 lb-ft
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
700 Nm
516 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.0
1,464 kg
3,228 lb
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
1,745 kg
3,847 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.0
315 km/h
196 mph
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
Unrestricted
305 km/h190 mph
Restricted
290 km/h180 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.03.4 s
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V83.9 s

Although Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8 has more power, Porsche 718 Cayman (982) GT4 RS 4.0 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 718 Cayman (982) GT4 RS 4.0 and Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8: 0.5 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.0
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8 and Porsche 718 Cayman (982) GT4 RS 4.0: 2.2 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.0
337 hp/t
251 kW/t
3.0 kg/hp
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
292 hp/t
218 kW/t
3.4 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
Porsche718 Cayman (982)GT4 RS 4.0
520 km
323 mi
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
653 km
406 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche718 Cayman (982)GT4 RS 4.0
493 hp
368 kW
3.4 s
315 km/h
196 mph
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
510 hp
380 kW
3.9 s
Unrestricted
305 km/h190 mph
Restricted
290 km/h180 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Chart data table
VehiclePerformance scorePracticality score
Porsche718 Cayman (982)GT4 RS 4.0
Power
493 hp
368 kW
0-100 km/h3.4 s
Top speed
315 km/h
196 mph
Doors/seats
2 doors
2 seats
Trunk
136 L
4.8 cu ft
Length
4,455 mm
175.4 in
Height
1,267 mm
49.9 in
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
Power
510 hp
380 kW
0-100 km/h3.9 s
Top speed
Unrestricted
305 km/h190 mph
Restricted
290 km/h180 mph
Doors/seats
2 doors
4 seats
Trunk
355 L
12.5 cu ft
Length
4,751 mm
187.0 in
Height
1,401 mm
55.2 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
Porsche718 Cayman (982)GT4 RS 4.0
Power
493 hp
368 kW
0-100 km/h3.4 s
Top speed
315 km/h
196 mph
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
Power
510 hp
380 kW
0-100 km/h3.9 s
Top speed
Unrestricted
305 km/h190 mph
Restricted
290 km/h180 mph
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8 is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
Porsche718 Cayman (982)GT4 RS 4.0
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
3.4 s
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
3.9 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
Porsche718 Cayman (982)GT4 RS 4.0
337 hp/t
251 kW/t
3.0 kg/hp
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
292 hp/t
218 kW/t
3.4 kg/hp
10.1 L/100 km
23.3 mpg US
28.0 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche718 Cayman (982)GT4 RS 4.0Mercedes-BenzC-class Coupe (C205)Facelift 2018AMG C 63 S V8
Power
493 hp
368 kW
510 hp
380 kW
Torque
449 Nm
331 lb-ft
700 Nm
516 lb-ft
Acceleration
3.4 s
3.9 s
Top speed
315 km/h
196 mph
Unrestricted
305 km/h190 mph
Restricted
290 km/h180 mph
Lightness
1,464 kg
3,228 lb
1,745 kg
3,847 lb
Fuel consumption
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
10.1 L/100 km
23.3 mpg US
28.0 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
136 L
4.8 cu ft
Length
4,455 mm
175.4 in
Height
1,267 mm
49.9 in
Doors/seats
2 doors
4 seats
Trunk
355 L
12.5 cu ft
Length
4,751 mm
187.0 in
Height
1,401 mm
55.2 in
Range score
520 km
323 mi
653 km
406 mi
CO2 score
-
230 g/km
Trunk score
136 L
4.8 cu ft
355 L
12.5 cu ft
Power-to-weight score
337 hp/t
251 kW/t
3.0 kg/hp
292 hp/t
218 kW/t
3.4 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
VehiclePorsche 718 Cayman (982) GT4 RS 4.0Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8
Consumption12.3 L/100 km19.1 mpg US23 mpg UK10.1 L/100 km23.3 mpg US28 mpg UK
Cost / 100 km21.53 LC100 km17.68 LC100 km
Cost / 100 mi34.64 LC100 mi28.45 LC100 mi
Annual fuel used1,845 L487 US gal406 UK gal1,515 L400 US gal333 UK gal
Annual fuel cost3,229 LC/year2,651 LC/year

Head-to-head comparisons

Porsche 718 Cayman (982) GT4 RS 4.0

  • Is 281 kg lighter
  • Is 0.5 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Has 44 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Lightest
  • Best power-to-weight ratio

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Smallest trunk

Mercedes-Benz C-class Coupe (C205) Facelift 2018 AMG C 63 S V8

  • Has 17 hp more
  • Has 251 Nm more
  • Uses 2.2 L/100 km less fuel
  • Has 133 km (83 mi) more estimated range
  • Has 219 L more trunk volume

Pros

  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 718 Cayman (982) GT4 RS 4.0
Mercedes-Benz C-class Coupe (C205) AMG C 63 S V8
Compare selected cars
2 vehicles selected

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