Car comparison

BMW 8 Series Gran Coupe (G16) 840ivsBMW X6 (G06) M50d

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

New comparison

BMW 8 Series Gran Coupe (G16)

840i

340 hp2998 ccGasolineRWDAutomaticTurbochargedCoupe2019-2020
VS

BMW X6 (G06)

M50d

400 hp2993 ccDieselAWDAutomaticTurbocharged2019-2020

Comparison overview

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

Best choices

BMW X6 (G06) M50d

  • Most powerful
    400 hp
    298 kW
  • Highest torque
    760 Nm
    561 lb-ft
  • Lowest combined fuel consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Lowest city consumption
    8.1 L/100 km
    29.0 mpg US
    34.9 mpg UK
  • Best estimated range
    1,111 km
    690 mi
  • Largest trunk
    580 L
  • Best overall score
    76/100
  • Best performance score
    75/100
  • Best practicality score
    79/100

BMW 8 Series Gran Coupe (G16) 840i

  • Quickest 0-100 km/h
    5.2 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,800 kg
    3,968 lb
  • Best power-to-weight
    189 hp/t
    141 kW/t
    5.3 kg/hp
  • Lowest highway consumption
    6.5 L/100 km
    36.2 mpg US
    43.5 mpg UK
  • Lowest CO2 emissions
    170 g/km
  • Best economy score
    87/100

Specification comparison

Specification comparison
ModelBMW8 Series Gran Coupe (G16)840iBMWX6 (G06)M50d
Power
340hp254kW
400hp298kW
Torque
500Nm369lb-ft
760Nm561lb-ft
Curb weight
1,800kg3,968lb
2,260kg4,982lb
Gross weight
2,435kg5,368lb
3,010kg6,636lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
75.6s99% target: 262 km/h / 163 mph
Calculated
97.3s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.2s
5.2s
0-200 km/h
18.7s
Calculated
21.9s
Calculated
0-60 mph
4.9s
Calculated
4.9s
Calculated
Fuel consumption
7.5L/100 km31.4mpg US37.7mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Fuel consumption city
9.3L/100 km25.3mpg US30.4mpg UK
8.1L/100 km29mpg US34.9mpg UK
Fuel consumption highway
6.5L/100 km36.2mpg US43.5mpg UK
6.8L/100 km34.6mpg US41.5mpg UK
Quarter mile
13.3s
Calculated
13.5s
Calculated
Power-to-weight
189hp/t141kW/t86hp/1000 lb
Calculated
177hp/t132kW/t80hp/1000 lb
Calculated
Torque-to-weight
278Nm/t186lb-ft/ton
Calculated
336Nm/t225lb-ft/ton
Calculated
Estimated range
907km563mi
Calculated
1,111km690mi
Calculated
Displacement
2,998cc183cu in
2,993cc183cu in
Length
5,082mm200in
4,935mm194in
Width
1,932mm76in
2,004mm79in
Height
1,407mm55in
1,696mm67in
Wheelbase
3,023mm119in
2,975mm117in
Front track
1,627mm64in
1,678mm66in
Rear track
1,671mm66in
1,698mm67in
Ground clearance-
216mm9in
Trunk volume-
580L
Max trunk volume
440L
1,530L
Doors
4
5
Seats
5
5
Fuel tank
68L
80L
CO2 emissions
170g/km
190g/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.

BMW 8 Series Gran Coupe (G16) 840iBMW X6 (G06) M50dPowerTorque
  • BMW 8 Series Gran Coupe (G16) 840i: Power / Torque
  • BMW X6 (G06) M50d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW8 Series Gran Coupe (G16)840i5,000-6,500 rpm1,600-4,500 rpm6,750 rpm
BMWX6 (G06)M50d4,400 rpm2,000-3,000 rpm4,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW8 Series Gran Coupe (G16)840iBMWX6 (G06)M50d
Acceleration checkpoints
0-60 mph
0-97 km/h
4.9 s
4.9 s
0-100 km/h
0-62 mph
5.2 s
5.2 s
0-200 km/h
0-124 mph
18.7 s
21.9 s
Top speed
Unrestricted
265 km/h165 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
2.2 s
2.0 s
330 ft
101 m
5.8 s
5.7 s
1/8 mile
201 m
8.7 s
8.7 s
1000 ft
305 m
11.2 s
11.3 s
1/4 mile
402 m
13.3 s
13.5 s
Trap speed
1/4 mile
402 m
173 km/h
107 mph
165 km/h
103 mph

Power comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
340 hp
254 kW
BMWX6 (G06)M50d
400 hp
298 kW

BMW X6 (G06) M50d has 60 hp more than BMW 8 Series Gran Coupe (G16) 840i.

The biggest power difference is between BMW 8 Series Gran Coupe (G16) 840i and BMW X6 (G06) M50d: 60 hp (45 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
500 Nm
369 lb-ft
BMWX6 (G06)M50d
760 Nm
561 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
1,800 kg
3,968 lb
BMWX6 (G06)M50d
2,260 kg
4,982 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMWX6 (G06)M50d
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
VehicleValue
BMW8 Series Gran Coupe (G16)840i5.2 s
BMWX6 (G06)M50d5.2 s

Although BMW X6 (G06) M50d has more power, BMW 8 Series Gran Coupe (G16) 840i is quicker from 0-100 km/h.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
BMWX6 (G06)M50d
7.2 L/100 km
32.7 mpg US
39.2 mpg UK

Power-to-weight comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
189 hp/t
141 kW/t
5.3 kg/hp
BMWX6 (G06)M50d
177 hp/t
132 kW/t
5.6 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840i
907 km
563 mi
BMWX6 (G06)M50d
1,111 km
690 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW8 Series Gran Coupe (G16)840i
340 hp
254 kW
5.2 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMWX6 (G06)M50d
400 hp
298 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.

Chart data table
VehiclePerformance scorePracticality score
BMW8 Series Gran Coupe (G16)840i
Power
340 hp
254 kW
0-100 km/h5.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
4 doors
5 seats
Trunk
440 L
15.5 cu ft
Length
5,082 mm
200.1 in
Height
1,407 mm
55.4 in
BMWX6 (G06)M50d
Power
400 hp
298 kW
0-100 km/h5.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
580 L
20.5 cu ft
Length
4,935 mm
194.3 in
Height
1,696 mm
66.8 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
BMW8 Series Gran Coupe (G16)840i
Power
340 hp
254 kW
0-100 km/h5.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
BMWX6 (G06)M50d
Power
400 hp
298 kW
0-100 km/h5.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.2 L/100 km
32.7 mpg US
39.2 mpg UK

BMW X6 (G06) M50d 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
BMW8 Series Gran Coupe (G16)840i
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
5.2 s
BMWX6 (G06)M50d
7.2 L/100 km
32.7 mpg US
39.2 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
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
BMW8 Series Gran Coupe (G16)840i
189 hp/t
141 kW/t
5.3 kg/hp
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
BMWX6 (G06)M50d
177 hp/t
132 kW/t
5.7 kg/hp
7.2 L/100 km
32.7 mpg US
39.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW8 Series Gran Coupe (G16)840iBMWX6 (G06)M50d
Power
340 hp
254 kW
400 hp
298 kW
Torque
500 Nm
369 lb-ft
760 Nm
561 lb-ft
Acceleration
5.2 s
5.2 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,800 kg
3,968 lb
2,260 kg
4,982 lb
Fuel consumption
7.5 L/100 km
31.4 mpg US
37.7 mpg UK
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
440 L
15.5 cu ft
Length
5,082 mm
200.1 in
Height
1,407 mm
55.4 in
Doors/seats
5 doors
5 seats
Trunk
580 L
20.5 cu ft
Length
4,935 mm
194.3 in
Height
1,696 mm
66.8 in
Range score
907 km
563 mi
1,111 km
690 mi
CO2 score
170 g/km
190 g/km
Trunk score
440 L
15.5 cu ft
580 L
20.5 cu ft
Power-to-weight score
189 hp/t
141 kW/t
5.3 kg/hp
177 hp/t
132 kW/t
5.7 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
VehicleBMW 8 Series Gran Coupe (G16) 840iBMW X6 (G06) M50d
Consumption7.5 L/100 km31.4 mpg US37.7 mpg UK7.2 L/100 km32.7 mpg US39.2 mpg UK
Cost / 100 km13.13 LC100 km12.60 LC100 km
Cost / 100 mi21.12 LC100 mi20.28 LC100 mi
Annual fuel used1,125 L297 US gal247 UK gal1,080 L285 US gal238 UK gal
Annual fuel cost1,969 LC/year1,890 LC/year

Head-to-head comparisons

BMW 8 Series Gran Coupe (G16) 840i

  • Is 460 kg lighter
  • Has 5 km/h (3 mph) higher top speed
  • Has 12 hp/t better power-to-weight
  • Emits 20 g/km less CO2

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

BMW X6 (G06) M50d

  • Has 60 hp more
  • Has 260 Nm more
  • Uses 0.3 L/100 km less fuel
  • Has 204 km (127 mi) more estimated range
  • Has 140 L more trunk volume

Pros

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

Cons

  • Heaviest
  • Lowest top speed
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series Gran Coupe (G16) 840i
BMW X6 (G06) M50d
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