Car comparison

Mercedes-Benz GLS (X166) AMG GLS 63vsRolls-Royce Cullinan 6.7 V12

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

New comparison

Mercedes-Benz GLS (X166)

AMG GLS 63

585 hp5461 ccGasolineAWDAutomaticTwin-turboSUV2015-2019

Rolls-Royce Cullinan

6.7 V12

571 hp6749 ccGasolineAWDAutomaticTwin-turboSUV2018-present

Comparison overview

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

Mercedes-Benz GLS (X166) AMG GLS 63

Quickest 0-100 km/h
4.6 s
Fastest top speed
260 km/h
162 mph Unrestricted
250 km/h
155 mph Restricted
Most powerful
585 hp
436 kW
Lightest
2,505 kg
5,523 lb
Best power-to-weight
234 hp/t
174 kW/t
4.3 kg/hp
Lowest combined fuel consumption
12.3 L/100 km
19.1 mpg US
23.0 mpg UK
Lowest city consumption
15.8 L/100 km
14.9 mpg US
17.9 mpg UK
Lowest highway consumption
10.3 L/100 km
22.8 mpg US
27.4 mpg UK
Lowest CO2 emissions
288 g/km
Largest trunk
680 L
Best overall score
85/100
Best performance score
81/100
Best economy score
74/100
Best practicality score
93/100

Rolls-Royce Cullinan 6.7 V12

Highest torque
850 Nm
627 lb-ft

Specification comparison

Specification comparison
Model	Mercedes-BenzGLS (X166)AMG GLS 63	Rolls-RoyceCullinan6.7 V12
Power	585hp436kW	571hp426kW
Torque	760Nm561lb-ft	850Nm627lb-ft
Curb weight	2,505kg5,523lb	2,660kg5,864lb
Gross weight	3,290kg7,253lb	-
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Calculated
To 99% top speed	60.3s99% target: 257 km/h / 160 mph Calculated	72.6s99% target: 257 km/h / 160 mph Calculated
0-100 km/h	4.6s	5.2s
0-200 km/h	16.3s Calculated	19.0s Calculated
0-60 mph	4.4s Calculated	4.9s Calculated
Fuel consumption	12.3L/100 km19.1mpg US23.0mpg UK	15L/100 km15.7mpg US18.8mpg UK
Fuel consumption city	15.8L/100 km14.9mpg US17.9mpg UK	22.4L/100 km10.5mpg US12.6mpg UK
Fuel consumption highway	10.3L/100 km22.8mpg US27.4mpg UK	11L/100 km21.4mpg US25.7mpg UK
Quarter mile	12.7s Calculated	13.4s Calculated
Power-to-weight	234hp/t174kW/t106hp/1000 lb Calculated	215hp/t160kW/t97hp/1000 lb Calculated
Torque-to-weight	303Nm/t203lb-ft/ton Calculated	320Nm/t214lb-ft/ton Calculated
Estimated range	813km505mi Calculated	-
Displacement	5,461cc333cu in	6,749cc412cu in
Length	5,130mm202in	5,341mm210in
Width	1,934mm76in	2,000mm79in
Height	1,850mm73in	1,835mm72in
Wheelbase	3,075mm121in	3,295mm130in
Front track	1,655mm65in	-
Rear track	1,675mm66in	-
Trunk volume	680L	526L
Max trunk volume	2,300L	-
Doors	5	4
Seats	5	5
Fuel tank	100L	-
CO2 emissions	288g/km	341g/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.

Mercedes-Benz GLS (X166) AMG GLS 63Rolls-Royce Cullinan 6.7 V12PowerTorque

Dyno simulation data table
Vehicle	Peak power RPM	Peak torque RPM	Max engine speed
Mercedes-BenzGLS (X166)AMG GLS 63	5,500 rpm	1,750-5,250 rpm	5,750 rpm
Rolls-RoyceCullinan6.7 V12	5,000 rpm	1,600 rpm	5,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	Mercedes-BenzGLS (X166)AMG GLS 63	Rolls-RoyceCullinan6.7 V12
	Acceleration checkpoints
0-60 mph 0-97 km/h	4.4 s	4.9 s
0-100 km/h 0-62 mph	4.6 s	5.2 s
0-200 km/h 0-124 mph	16.3 s	19.0 s
Top speed	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph Likely limited
	Drag race simulation
60 ft 18 m	2.1 s	2.2 s
330 ft 101 m	5.5 s	5.8 s
1/8 mile 201 m	8.3 s	8.7 s
1000 ft 305 m	10.7 s	11.2 s
1/4 mile 402 m	12.7 s	13.4 s
Trap speed 1/4 mile 402 m	180 km/h 112 mph	172 km/h 107 mph

Power comparison

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

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)AMG GLS 63	585 hp 436 kW
Rolls-RoyceCullinan6.7 V12	571 hp 426 kW

Mercedes-Benz GLS (X166) AMG GLS 63 has 14 hp more than Rolls-Royce Cullinan 6.7 V12.

The biggest power difference is between Rolls-Royce Cullinan 6.7 V12 and Mercedes-Benz GLS (X166) AMG GLS 63: 14 hp (10 kW).

Torque comparison

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

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)AMG GLS 63	760 Nm 561 lb-ft
Rolls-RoyceCullinan6.7 V12	850 Nm 627 lb-ft

Curb weight comparison

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

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)AMG GLS 63	2,505 kg 5,523 lb
Rolls-RoyceCullinan6.7 V12	2,660 kg 5,864 lb

Top speed without limiter comparison

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

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)AMG GLS 63	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
Rolls-RoyceCullinan6.7 V12	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

0-100 km/h comparison

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

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)AMG GLS 63	4.6 s
Rolls-RoyceCullinan6.7 V12	5.2 s

The biggest 0-100 km/h difference is between Mercedes-Benz GLS (X166) AMG GLS 63 and Rolls-Royce Cullinan 6.7 V12: 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
Vehicle	Value
Mercedes-BenzGLS (X166)AMG GLS 63	12.3 L/100 km 19.1 mpg US 23.0 mpg UK
Rolls-RoyceCullinan6.7 V12	15.0 L/100 km 15.7 mpg US 18.8 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz GLS (X166) AMG GLS 63 and Rolls-Royce Cullinan 6.7 V12: 2.7 L/100 km.

Power-to-weight comparison

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

Chart data table
Vehicle	Value
Mercedes-BenzGLS (X166)AMG GLS 63	234 hp/t 174 kW/t 4.3 kg/hp
Rolls-RoyceCullinan6.7 V12	215 hp/t 160 kW/t 4.7 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
Mercedes-BenzGLS (X166)AMG GLS 63	585 hp 436 kW	4.6 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph
Rolls-RoyceCullinan6.7 V12	571 hp 426 kW	5.2 s	Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

Most attractive quadrant

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

Vehicle

Performance score

Practicality score

Mercedes-BenzGLS (X166)AMG GLS 63

Power	585 hp 436 kW
0-100 km/h	4.6 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

Doors/seats	5 doors 5 seats
Trunk	680 L 24.0 cu ft
Length	5,130 mm 202.0 in
Height	1,850 mm 72.8 in

Rolls-RoyceCullinan6.7 V12

Power	571 hp 426 kW
0-100 km/h	5.2 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

Doors/seats	4 doors 5 seats
Trunk	526 L 18.6 cu ft
Length	5,341 mm 210.3 in
Height	1,835 mm 72.2 in

Performance vs fuel economy

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

Vehicle

Performance score

Fuel economy score

Mercedes-BenzGLS (X166)AMG GLS 63

Power	585 hp 436 kW
0-100 km/h	4.6 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

12.3 L/100 km

19.1 mpg US

23.0 mpg UK

Rolls-RoyceCullinan6.7 V12

Power	571 hp 426 kW
0-100 km/h	5.2 s
Top speed Unrestricted 260 km/h162 mph Restricted 250 km/h155 mph

15.0 L/100 km

15.7 mpg US

18.8 mpg UK

Mercedes-Benz GLS (X166) AMG GLS 63 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
Vehicle	Fuel consumption, L/100 km	0-100 km/h, s
Mercedes-BenzGLS (X166)AMG GLS 63	12.3 L/100 km 19.1 mpg US 23.0 mpg UK	4.6 s
Rolls-RoyceCullinan6.7 V12	15.0 L/100 km 15.7 mpg US 18.8 mpg UK	5.2 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
Vehicle	Power-to-weight, hp/t	Fuel consumption, L/100 km
Mercedes-BenzGLS (X166)AMG GLS 63	234 hp/t 174 kW/t 4.3 kg/hp	12.3 L/100 km 19.1 mpg US 23.0 mpg UK
Rolls-RoyceCullinan6.7 V12	215 hp/t 160 kW/t 4.7 kg/hp	15.0 L/100 km 15.7 mpg US 18.8 mpg UK

Detailed score breakdown

Vehicle

Mercedes-BenzGLS (X166)AMG GLS 63

Rolls-RoyceCullinan6.7 V12

Power

585 hp

436 kW

571 hp

426 kW

Torque

760 Nm

561 lb-ft

850 Nm

627 lb-ft

Acceleration

4.6 s

5.2 s

Top speed

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

Unrestricted

260 km/h162 mph

Restricted

250 km/h155 mph

Lightness

2,505 kg

5,523 lb

2,660 kg

5,864 lb

Fuel consumption

12.3 L/100 km

19.1 mpg US

23.0 mpg UK

15.0 L/100 km

15.7 mpg US

18.8 mpg UK

Practicality

Doors/seats	5 doors 5 seats
Trunk	680 L 24.0 cu ft
Length	5,130 mm 202.0 in
Height	1,850 mm 72.8 in

Doors/seats	4 doors 5 seats
Trunk	526 L 18.6 cu ft
Length	5,341 mm 210.3 in
Height	1,835 mm 72.2 in

Range score

813 km

505 mi

CO2 score

288 g/km

341 g/km

Trunk score

680 L

24.0 cu ft

526 L

18.6 cu ft

Power-to-weight score

234 hp/t

174 kW/t

4.3 kg/hp

215 hp/t

160 kW/t

4.7 kg/hp

Overall

Fixed score

Fuel cost and annual usage

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

Average annual distanceDistance unitFuel price in your local currencyPrice unit

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
Vehicle	Mercedes-Benz GLS (X166) AMG GLS 63	Rolls-Royce Cullinan 6.7 V12
Consumption	12.3 L/100 km19.1 mpg US23 mpg UK	15 L/100 km15.7 mpg US18.8 mpg UK
Cost / 100 km	21.53 LC100 km	26.25 LC100 km
Cost / 100 mi	34.64 LC100 mi	42.25 LC100 mi
Annual fuel used	1,845 L487 US gal406 UK gal	2,250 L594 US gal495 UK gal
Annual fuel cost	3,229 LC/year	3,938 LC/year