Car comparison

Porsche 911 (991 II) GT3 RS 4.0vsMercedes-Benz AMG GT (C190) · Facelift 2017 S 4.0 V8

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

New comparison

Porsche 911 (991 II)

GT3 RS 4.0

520 hp3996 ccGasolineRWDDual-clutchNaturally aspiratedCoupe2018-2019
VS

Mercedes-Benz AMG GT (C190) · Facelift 2017

S 4.0 V8

522 hp3982 ccGasolineRWDDual-clutchTwin-turboCoupe2017-2021

Comparison overview

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

Best choices

Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8

  • Most powerful
    522 hp
    389 kW
  • Highest torque
    670 Nm
    494 lb-ft
  • Lowest combined fuel consumption
    9.6 L/100 km
    24.5 mpg US
    29.4 mpg UK
  • Lowest city consumption
    12.5 L/100 km
    18.8 mpg US
    22.6 mpg UK
  • Lowest highway consumption
    7.9 L/100 km
    29.8 mpg US
    35.8 mpg UK
  • Lowest CO2 emissions
    224 g/km
  • Best estimated range
    677 km
    421 mi
  • Best overall score
    74/100
  • Best performance score
    91/100
  • Best economy score
    81/100
  • Best practicality score
    39/100

Porsche 911 (991 II) GT3 RS 4.0

  • Quickest 0-100 km/h
    3.2 s
  • Fastest top speed
    325 km/h
    202 mph Unrestricted
    312 km/h
    194 mph Restricted
  • Lightest
    1,430 kg
    3,153 lb
  • Best power-to-weight
    364 hp/t
    271 kW/t
    2.8 kg/hp

Specification comparison

Specification comparison
ModelPorsche911 (991 II)GT3 RS 4.0Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
Power
520hp388kW
522hp389kW
Torque
470Nm347lb-ft
670Nm494lb-ft
Curb weight
1,430kg3,153lb
1,570kg3,461lb
Gross weight
1,793kg3,953lb
1,890kg4,167lb
Top speed
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Calculated
Unrestricted
325 km/h202 mph
Restricted
310 km/h193 mph
Calculated
To 99% top speed
45.6s99% target: 322 km/h / 200 mph
Calculated
56.3s99% target: 322 km/h / 200 mph
Calculated
0-100 km/h
3.2s
3.8s
0-200 km/h
8.7s
Calculated
10.5s
Calculated
0-60 mph
3.1s
Calculated
3.6s
Calculated
Fuel consumption
12.8L/100 km18.4mpg US22.1mpg UK
9.6L/100 km24.5mpg US29.4mpg UK
Fuel consumption city
19.2L/100 km12.3mpg US14.7mpg UK
12.5L/100 km18.8mpg US22.6mpg UK
Fuel consumption highway
9L/100 km26.1mpg US31.4mpg UK
7.9L/100 km29.8mpg US35.8mpg UK
Quarter mile
10.7s
Calculated
11.5s
Calculated
Power-to-weight
364hp/t271kW/t165hp/1000 lb
Calculated
332hp/t248kW/t151hp/1000 lb
Calculated
Torque-to-weight
329Nm/t220lb-ft/ton
Calculated
427Nm/t286lb-ft/ton
Calculated
Estimated range
500km311mi
Calculated
677km421mi
Calculated
Displacement
3,996cc244cu in
3,982cc243cu in
Length
4,557mm179in
4,544mm179in
Width
1,880mm74in
-
Height
1,297mm51in
1,287mm51in
Wheelbase
2,453mm97in
2,630mm104in
Front track
1,588mm63in
1,684mm66in
Rear track
1,557mm61in
-
Ground clearance-
96mm4in
Trunk volume
125L
-
Doors
2
2
Seats
2
2
Fuel tank
64L
65L
CO2 emissions
291g/km
224g/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 911 (991 II) GT3 RS 4.0Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8PowerTorque
  • Porsche 911 (991 II) GT3 RS 4.0: Power / Torque
  • Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 (991 II)GT3 RS 4.08,250 rpm6,000 rpm9,000 rpm
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V86,250 rpm1,800-5,000 rpm6,500 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 (991 II)GT3 RS 4.0Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
Acceleration checkpoints
0-60 mph
0-97 km/h
3.1 s
3.6 s
0-100 km/h
0-62 mph
3.2 s
3.8 s
0-200 km/h
0-124 mph
8.7 s
10.5 s
0-200 mph
0-322 km/h
46.0 s
56.7 s
Top speed
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Likely limited
Unrestricted
325 km/h202 mph
Restricted
310 km/h193 mph
Likely limited
Drag race simulation
60 ft
18 m
1.9 s
2.0 s
330 ft
101 m
4.8 s
5.2 s
1/8 mile
201 m
7.1 s
7.6 s
1000 ft
305 m
9.1 s
9.7 s
1/4 mile
402 m
10.7 s
11.5 s
Trap speed
1/4 mile
402 m
223 km/h
139 mph
210 km/h
130 mph

Power comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 RS 4.0
520 hp
388 kW
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
522 hp
389 kW

Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8 has 2 hp more than Porsche 911 (991 II) GT3 RS 4.0.

The biggest power difference is between Porsche 911 (991 II) GT3 RS 4.0 and Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8: 2 hp (1 kW).

Torque comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 RS 4.0
470 Nm
347 lb-ft
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
670 Nm
494 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 RS 4.0
1,430 kg
3,153 lb
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
1,570 kg
3,461 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 RS 4.0
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
Unrestricted
325 km/h202 mph
Restricted
310 km/h193 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 RS 4.03.2 s
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V83.8 s

Although Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8 has more power, Porsche 911 (991 II) GT3 RS 4.0 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Porsche 911 (991 II) GT3 RS 4.0 and Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8: 0.6 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 RS 4.0
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
9.6 L/100 km
24.5 mpg US
29.4 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8 and Porsche 911 (991 II) GT3 RS 4.0: 3.2 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
Porsche911 (991 II)GT3 RS 4.0
364 hp/t
271 kW/t
2.7 kg/hp
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
332 hp/t
248 kW/t
3.0 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Porsche911 (991 II)GT3 RS 4.0
500 km
311 mi
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
677 km
421 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 (991 II)GT3 RS 4.0
520 hp
388 kW
3.2 s
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
522 hp
389 kW
3.8 s
Unrestricted
325 km/h202 mph
Restricted
310 km/h193 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
Porsche911 (991 II)GT3 RS 4.0
Power
520 hp
388 kW
0-100 km/h3.2 s
Top speed
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,557 mm
179.4 in
Height
1,297 mm
51.1 in
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
Power
522 hp
389 kW
0-100 km/h3.8 s
Top speed
Unrestricted
325 km/h202 mph
Restricted
310 km/h193 mph
Doors/seats
2 doors
2 seats
Trunk-
Length
4,544 mm
178.9 in
Height
1,287 mm
50.7 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
Porsche911 (991 II)GT3 RS 4.0
Power
520 hp
388 kW
0-100 km/h3.2 s
Top speed
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
Power
522 hp
389 kW
0-100 km/h3.8 s
Top speed
Unrestricted
325 km/h202 mph
Restricted
310 km/h193 mph
9.6 L/100 km
24.5 mpg US
29.4 mpg UK

Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 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
Porsche911 (991 II)GT3 RS 4.0
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
3.2 s
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
3.8 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
Porsche911 (991 II)GT3 RS 4.0
364 hp/t
271 kW/t
2.8 kg/hp
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
332 hp/t
248 kW/t
3.0 kg/hp
9.6 L/100 km
24.5 mpg US
29.4 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 (991 II)GT3 RS 4.0Mercedes-BenzAMG GT (C190)Facelift 2017S 4.0 V8
Power
520 hp
388 kW
522 hp
389 kW
Torque
470 Nm
347 lb-ft
670 Nm
494 lb-ft
Acceleration
3.2 s
3.8 s
Top speed
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Unrestricted
325 km/h202 mph
Restricted
310 km/h193 mph
Lightness
1,430 kg
3,153 lb
1,570 kg
3,461 lb
Fuel consumption
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
9.6 L/100 km
24.5 mpg US
29.4 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk
125 L
4.4 cu ft
Length
4,557 mm
179.4 in
Height
1,297 mm
51.1 in
Doors/seats
2 doors
2 seats
Trunk-
Length
4,544 mm
178.9 in
Height
1,287 mm
50.7 in
Range score
500 km
311 mi
677 km
421 mi
CO2 score
291 g/km
224 g/km
Trunk score
125 L
4.4 cu ft
-
Power-to-weight score
364 hp/t
271 kW/t
2.8 kg/hp
332 hp/t
248 kW/t
3.0 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 911 (991 II) GT3 RS 4.0Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8
Consumption12.8 L/100 km18.4 mpg US22.1 mpg UK9.6 L/100 km24.5 mpg US29.4 mpg UK
Cost / 100 km22.40 LC100 km16.80 LC100 km
Cost / 100 mi36.05 LC100 mi27.04 LC100 mi
Annual fuel used1,920 L507 US gal422 UK gal1,440 L380 US gal317 UK gal
Annual fuel cost3,360 LC/year2,520 LC/year

Head-to-head comparisons

Porsche 911 (991 II) GT3 RS 4.0

  • Is 140 kg lighter
  • Is 0.6 s quicker from 0-100 km/h
  • Has 31 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
  • Highest CO2 emissions

Mercedes-Benz AMG GT (C190) Facelift 2017 S 4.0 V8

  • Has 2 hp more
  • Has 200 Nm more
  • Uses 3.2 L/100 km less fuel
  • Has 177 km (110 mi) more estimated range
  • Emits 67 g/km less CO2

Pros

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

Cons

  • Slowest 0-100 km/h
  • Heaviest

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 (991 II) GT3 RS 4.0
Mercedes-Benz AMG GT (C190) S 4.0 V8
Compare selected cars
2 vehicles selected

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