Car comparison

Mercedes-Benz GLS (X167) · Facelift 2026 GLS 450dvsMercedes-Benz GLS (X166) GLS 400

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

New comparison

Mercedes-Benz GLS (X167) · Facelift 2026

GLS 450d

367 hp2989 ccDieselAWDAutomaticTwin-turboSUV2026-present
VS

Mercedes-Benz GLS (X166)

GLS 400

333 hp2996 ccGasolineAWDAutomaticTwin-turboSUV2015-2019

Comparison overview

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

Best choices

Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d

  • Quickest 0-100 km/h
    5.7 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    367 hp
    274 kW
  • Highest torque
    750 Nm
    553 lb-ft
  • Best power-to-weight
    142 hp/t
    106 kW/t
    7.1 kg/hp
  • Lowest combined fuel consumption
    8.5 L/100 km
    27.7 mpg US
    33.2 mpg UK
  • Best overall score
    74/100
  • Best performance score
    71/100
  • Best economy score
    84/100

Specification comparison

Specification comparison
ModelMercedes-BenzGLS (X167)Facelift 2026GLS 450dMercedes-BenzGLS (X166)GLS 400
Power
367hp274kW
333hp248kW
Torque
750Nm553lb-ft
480Nm354lb-ft
Curb weight
2,590kg5,710lb
2,360kg5,203lb
Gross weight
3,485kg7,683lb
3,250kg7,165lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
240 km/h
149 mph
To 99% top speed
93.2s99% target: 257 km/h / 160 mph
Calculated
93.3s99% target: 238 km/h / 148 mph
Calculated
0-100 km/h
5.7s
6.6s
0-200 km/h
22.5s
Calculated
29.1s
Calculated
0-60 mph
5.4s
Calculated
6.2s
Calculated
Fuel consumption
8.5L/100 km27.7mpg US33.2mpg UK
9.4L/100 km25mpg US30.1mpg UK
Fuel consumption city-
11.7L/100 km20.1mpg US24.1mpg UK
Fuel consumption highway-
8L/100 km29.4mpg US35.3mpg UK
Quarter mile
13.9s
Calculated
14.7s
Calculated
Power-to-weight
142hp/t106kW/t64hp/1000 lb
Calculated
141hp/t105kW/t64hp/1000 lb
Calculated
Torque-to-weight
290Nm/t194lb-ft/ton
Calculated
203Nm/t136lb-ft/ton
Calculated
Estimated range
1,059km658mi
Calculated
1,064km661mi
Calculated
Displacement
2,989cc182cu in
2,996cc183cu in
Length
5,217mm205in
5,130mm202in
Width
1,956mm77in
1,934mm76in
Height
1,823mm72in
1,850mm73in
Wheelbase
3,135mm123in
3,075mm121in
Front track-
1,655mm65in
Rear track-
1,675mm66in
Ground clearance
215mm8in
-
Trunk volume
355L
680L
Max trunk volume
2,400L
2,300L
Doors
5
5
Seats
7
5
Fuel tank
90L
100L
CO2 emissions-
218g/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 (X167) Facelift 2026 GLS 450dMercedes-Benz GLS (X166) GLS 400PowerTorque
  • Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d: Power / Torque
  • Mercedes-Benz GLS (X166) GLS 400: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d4,000 rpm1,350-2,800 rpm4,250 rpm
Mercedes-BenzGLS (X166)GLS 4005,250-6,000 rpm1,600-4,000 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricMercedes-BenzGLS (X167)Facelift 2026GLS 450dMercedes-BenzGLS (X166)GLS 400
Acceleration checkpoints
0-60 mph
0-97 km/h
5.4 s
6.2 s
0-100 km/h
0-62 mph
5.7 s
6.6 s
0-200 km/h
0-124 mph
22.5 s
29.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Limited
240 km/h
149 mph
Drag race simulation
60 ft
18 m
2.2 s
2.3 s
330 ft
101 m
5.9 s
6.3 s
1/8 mile
201 m
9.0 s
9.5 s
1000 ft
305 m
11.7 s
12.3 s
1/4 mile
402 m
13.9 s
14.7 s
Trap speed
1/4 mile
402 m
164 km/h
102 mph
154 km/h
96 mph

Power comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
367 hp
274 kW
Mercedes-BenzGLS (X166)GLS 400
333 hp
248 kW

Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d has 34 hp more than Mercedes-Benz GLS (X166) GLS 400.

The biggest power difference is between Mercedes-Benz GLS (X166) GLS 400 and Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d: 34 hp (25 kW).

Torque comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
750 Nm
553 lb-ft
Mercedes-BenzGLS (X166)GLS 400
480 Nm
354 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
2,590 kg
5,710 lb
Mercedes-BenzGLS (X166)GLS 400
2,360 kg
5,203 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzGLS (X166)GLS 400
240 km/h
149 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d5.7 s
Mercedes-BenzGLS (X166)GLS 4006.6 s

The biggest 0-100 km/h difference is between Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d and Mercedes-Benz GLS (X166) GLS 400: 0.9 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
Mercedes-BenzGLS (X166)GLS 400
9.4 L/100 km
25.0 mpg US
30.1 mpg UK

The biggest fuel consumption difference is between Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d and Mercedes-Benz GLS (X166) GLS 400: 0.9 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
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
142 hp/t
106 kW/t
7.1 kg/hp
Mercedes-BenzGLS (X166)GLS 400
141 hp/t
105 kW/t
7.1 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
1,059 km
658 mi
Mercedes-BenzGLS (X166)GLS 400
1,064 km
661 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
367 hp
274 kW
5.7 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Mercedes-BenzGLS (X166)GLS 400
333 hp
248 kW
6.6 s
240 km/h
149 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
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
Power
367 hp
274 kW
0-100 km/h5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
7 seats
Trunk
355 L
12.5 cu ft
Length
5,217 mm
205.4 in
Height
1,823 mm
71.8 in
Mercedes-BenzGLS (X166)GLS 400
Power
333 hp
248 kW
0-100 km/h6.6 s
Top speed
240 km/h
149 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

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
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
Power
367 hp
274 kW
0-100 km/h5.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
Mercedes-BenzGLS (X166)GLS 400
Power
333 hp
248 kW
0-100 km/h6.6 s
Top speed
240 km/h
149 mph
9.4 L/100 km
25.0 mpg US
30.1 mpg UK

Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d 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
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
5.7 s
Mercedes-BenzGLS (X166)GLS 400
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
6.6 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
Mercedes-BenzGLS (X167)Facelift 2026GLS 450d
142 hp/t
106 kW/t
7.1 kg/hp
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
Mercedes-BenzGLS (X166)GLS 400
141 hp/t
105 kW/t
7.1 kg/hp
9.4 L/100 km
25.0 mpg US
30.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleMercedes-BenzGLS (X167)Facelift 2026GLS 450dMercedes-BenzGLS (X166)GLS 400
Power
367 hp
274 kW
333 hp
248 kW
Torque
750 Nm
553 lb-ft
480 Nm
354 lb-ft
Acceleration
5.7 s
6.6 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
240 km/h
149 mph
Lightness
2,590 kg
5,710 lb
2,360 kg
5,203 lb
Fuel consumption
8.5 L/100 km
27.7 mpg US
33.2 mpg UK
9.4 L/100 km
25.0 mpg US
30.1 mpg UK
Practicality
Doors/seats
5 doors
7 seats
Trunk
355 L
12.5 cu ft
Length
5,217 mm
205.4 in
Height
1,823 mm
71.8 in
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
Range score
1,059 km
658 mi
1,064 km
661 mi
CO2 score
-
218 g/km
Trunk score
355 L
12.5 cu ft
680 L
24.0 cu ft
Power-to-weight score
142 hp/t
106 kW/t
7.1 kg/hp
141 hp/t
105 kW/t
7.1 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
VehicleMercedes-Benz GLS (X167) Facelift 2026 GLS 450dMercedes-Benz GLS (X166) GLS 400
Consumption8.5 L/100 km27.7 mpg US33.2 mpg UK9.4 L/100 km25 mpg US30.1 mpg UK
Cost / 100 km14.88 LC100 km16.45 LC100 km
Cost / 100 mi23.94 LC100 mi26.47 LC100 mi
Annual fuel used1,275 L337 US gal280 UK gal1,410 L372 US gal310 UK gal
Annual fuel cost2,231 LC/year2,468 LC/year

Head-to-head comparisons

Mercedes-Benz GLS (X167) Facelift 2026 GLS 450d

  • Has 34 hp more
  • Has 270 Nm more
  • Is 0.9 s quicker from 0-100 km/h
  • Has 20 km/h (12 mph) higher top speed
  • Uses 0.9 L/100 km less fuel
  • Has 1 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best power-to-weight ratio

Cons

  • Heaviest
  • Smallest trunk

Mercedes-Benz GLS (X166) GLS 400

  • Is 230 kg lighter
  • Has 5 km (3 mi) more estimated range
  • Has 325 L more trunk volume

Pros

  • Lightest
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
Mercedes-Benz GLS (X167) GLS 450d
Mercedes-Benz GLS (X166) GLS 400
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Mercedes-Benz GLS (X167) · Facelift 2026 GLS 450d vs Mercedes-Benz GLS (X166) GLS 400 - car comparison - FastVsFaster