Car comparison

McLaren 540C 3.8 V8vsPorsche 911 (991 II) GT3 RS 4.0

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

New comparison

McLaren 540C

3.8 V8

540 hp3799 ccGasolineRWDAutomaticTwin-turboCoupe2015-2021
VS

Porsche 911 (991 II)

GT3 RS 4.0

520 hp3996 ccGasolineRWDDual-clutchNaturally aspiratedCoupe2018-2019

Comparison overview

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

Best choices

McLaren 540C 3.8 V8

  • Fastest top speed
    330 km/h
    205 mph Unrestricted
    320 km/h
    199 mph Restricted
  • Most powerful
    540 hp
    403 kW
  • Highest torque
    540 Nm
    398 lb-ft
  • Lightest
    1,311 kg
    2,890 lb
  • Best power-to-weight
    412 hp/t
    307 kW/t
    2.4 kg/hp
  • Lowest combined fuel consumption
    10.7 L/100 km
    22.0 mpg US
    26.4 mpg UK
  • Lowest city consumption
    16.5 L/100 km
    14.3 mpg US
    17.1 mpg UK
  • Lowest highway consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK
  • Lowest CO2 emissions
    249 g/km
  • Best overall score
    74/100
  • Best performance score
    91/100
  • Best economy score
    78/100
  • Best practicality score
    39/100

Specification comparison

Specification comparison
ModelMcLaren540C3.8 V8Porsche911 (991 II)GT3 RS 4.0
Power
540hp403kW
520hp388kW
Torque
540Nm398lb-ft
470Nm347lb-ft
Curb weight
1,311kg2,890lb
1,430kg3,153lb
Gross weight-
1,793kg3,953lb
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Calculated
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Calculated
To 99% top speed
66.9s99% target: 327 km/h / 203 mph
Calculated
45.3s99% target: 322 km/h / 200 mph
Calculated
0-100 km/h
3.5s
3.2s
0-200 km/h
10.5s
8.7s
Calculated
0-60 mph
3.3s
Calculated
3.1s
Calculated
Fuel consumption
10.7L/100 km22mpg US26.4mpg UK
12.8L/100 km18.4mpg US22.1mpg UK
Fuel consumption city
16.5L/100 km14.3mpg US17.1mpg UK
19.2L/100 km12.3mpg US14.7mpg UK
Fuel consumption highway
7.4L/100 km31.8mpg US38.2mpg UK
9L/100 km26.1mpg US31.4mpg UK
Quarter mile
11.3s
Calculated
10.7s
Calculated
Power-to-weight
412hp/t307kW/t187hp/1000 lb
Calculated
364hp/t271kW/t165hp/1000 lb
Calculated
Torque-to-weight
412Nm/t276lb-ft/ton
Calculated
329Nm/t220lb-ft/ton
Calculated
Estimated range-
500km311mi
Calculated
Displacement
3,799cc232cu in
3,996cc244cu in
Length
4,530mm178in
4,557mm179in
Width
2,095mm82in
1,880mm74in
Height
1,202mm47in
1,297mm51in
Wheelbase-
2,453mm97in
Front track-
1,588mm63in
Rear track-
1,557mm61in
Trunk volume-
125L
Doors
2
2
Seats
2
2
Fuel tank-
64L
CO2 emissions
249g/km
291g/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.

McLaren 540C 3.8 V8Porsche 911 (991 II) GT3 RS 4.0PowerTorque
  • McLaren 540C 3.8 V8: Power / Torque
  • Porsche 911 (991 II) GT3 RS 4.0: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
McLaren540C3.8 V87,500 rpm3,500-6,500 rpm7,750 rpm
Porsche911 (991 II)GT3 RS 4.08,250 rpm6,000 rpm9,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMcLaren540C3.8 V8Porsche911 (991 II)GT3 RS 4.0
Acceleration checkpoints
0-60 mph
0-97 km/h
3.3 s
3.1 s
0-100 km/h
0-62 mph
3.5 s
3.2 s
0-200 km/h
0-124 mph
10.5 s
8.7 s
0-200 mph
0-322 km/h
52.0 s
45.7 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Likely limited
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Likely limited
Drag race simulation
60 ft
18 m
1.9 s
1.9 s
330 ft
101 m
4.9 s
4.8 s
1/8 mile
201 m
7.4 s
7.1 s
1000 ft
305 m
9.5 s
9.1 s
1/4 mile
402 m
11.3 s
10.7 s
Trap speed
1/4 mile
402 m
207 km/h
129 mph
223 km/h
139 mph

Power comparison

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

Chart data table
VehicleValue
McLaren540C3.8 V8
540 hp
403 kW
Porsche911 (991 II)GT3 RS 4.0
520 hp
388 kW

McLaren 540C 3.8 V8 has 20 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 McLaren 540C 3.8 V8: 20 hp (15 kW).

Torque comparison

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

Chart data table
VehicleValue
McLaren540C3.8 V8
540 Nm
398 lb-ft
Porsche911 (991 II)GT3 RS 4.0
470 Nm
347 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
McLaren540C3.8 V8
1,311 kg
2,890 lb
Porsche911 (991 II)GT3 RS 4.0
1,430 kg
3,153 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
McLaren540C3.8 V8
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Porsche911 (991 II)GT3 RS 4.0
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
McLaren540C3.8 V83.5 s
Porsche911 (991 II)GT3 RS 4.03.2 s

Although McLaren 540C 3.8 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 McLaren 540C 3.8 V8: 0.3 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
McLaren540C3.8 V8
10.7 L/100 km
22.0 mpg US
26.4 mpg UK
Porsche911 (991 II)GT3 RS 4.0
12.8 L/100 km
18.4 mpg US
22.1 mpg UK

The biggest fuel consumption difference is between McLaren 540C 3.8 V8 and Porsche 911 (991 II) GT3 RS 4.0: 2.1 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
McLaren540C3.8 V8
412 hp/t
307 kW/t
2.4 kg/hp
Porsche911 (991 II)GT3 RS 4.0
364 hp/t
271 kW/t
2.7 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
McLaren540C3.8 V8
540 hp
403 kW
3.5 s
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Porsche911 (991 II)GT3 RS 4.0
520 hp
388 kW
3.2 s
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 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
McLaren540C3.8 V8
Power
540 hp
403 kW
0-100 km/h3.5 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Doors/seats
2 doors
2 seats
Trunk-
Length
4,530 mm
178.3 in
Height
1,202 mm
47.3 in
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

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
McLaren540C3.8 V8
Power
540 hp
403 kW
0-100 km/h3.5 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
10.7 L/100 km
22.0 mpg US
26.4 mpg UK
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

McLaren 540C 3.8 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
McLaren540C3.8 V8
10.7 L/100 km
22.0 mpg US
26.4 mpg UK
3.5 s
Porsche911 (991 II)GT3 RS 4.0
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
3.2 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
McLaren540C3.8 V8
412 hp/t
307 kW/t
2.4 kg/hp
10.7 L/100 km
22.0 mpg US
26.4 mpg UK
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

Detailed score breakdown

Detailed score breakdown
VehicleMcLaren540C3.8 V8Porsche911 (991 II)GT3 RS 4.0
Power
540 hp
403 kW
520 hp
388 kW
Torque
540 Nm
398 lb-ft
470 Nm
347 lb-ft
Acceleration
3.5 s
3.2 s
Top speed
Unrestricted
330 km/h205 mph
Restricted
320 km/h199 mph
Unrestricted
325 km/h202 mph
Restricted
312 km/h194 mph
Lightness
1,311 kg
2,890 lb
1,430 kg
3,153 lb
Fuel consumption
10.7 L/100 km
22.0 mpg US
26.4 mpg UK
12.8 L/100 km
18.4 mpg US
22.1 mpg UK
Practicality
Doors/seats
2 doors
2 seats
Trunk-
Length
4,530 mm
178.3 in
Height
1,202 mm
47.3 in
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
Range score
-
500 km
311 mi
CO2 score
249 g/km
291 g/km
Trunk score
-
125 L
4.4 cu ft
Power-to-weight score
412 hp/t
307 kW/t
2.4 kg/hp
364 hp/t
271 kW/t
2.8 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
VehicleMcLaren 540C 3.8 V8Porsche 911 (991 II) GT3 RS 4.0
Consumption10.7 L/100 km22 mpg US26.4 mpg UK12.8 L/100 km18.4 mpg US22.1 mpg UK
Cost / 100 km18.72 LC100 km22.40 LC100 km
Cost / 100 mi30.13 LC100 mi36.05 LC100 mi
Annual fuel used1,605 L424 US gal353 UK gal1,920 L507 US gal422 UK gal
Annual fuel cost2,809 LC/year3,360 LC/year

Head-to-head comparisons

McLaren 540C 3.8 V8

  • Has 20 hp more
  • Has 70 Nm more
  • Is 119 kg lighter
  • Has 5 km/h (3 mph) higher top speed
  • Uses 2.1 L/100 km less fuel
  • Has 48 hp/t better power-to-weight
  • Emits 42 g/km less CO2

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio

Cons

  • Slowest 0-100 km/h

Porsche 911 (991 II) GT3 RS 4.0

  • Is 0.3 s quicker from 0-100 km/h

Pros

  • Quickest 0-100 km/h in this comparison

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Heaviest
  • Lowest top speed
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
McLaren 540C 3.8 V8
Porsche 911 (991 II) GT3 RS 4.0
Compare selected cars
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