Car comparison

BMW 8 Series Gran Coupe (G16) 840dvsBMW X4 (G02) M40d

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

New comparison

BMW 8 Series Gran Coupe (G16)

840d

340 hp2993 ccDieselAWDAutomaticTurbochargedCoupe2020-2022
VS

BMW X4 (G02)

M40d

340 hp2993 ccDieselAWDAutomaticTurbocharged2020-2021

Comparison overview

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

Best choices

BMW 8 Series Gran Coupe (G16) 840d

  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    340 hp
    254 kW
  • Highest torque
    700 Nm
    516 lb-ft
  • Lightest
    1,995 kg
    4,398 lb
  • Best power-to-weight
    170 hp/t
    127 kW/t
    5.9 kg/hp
  • Lowest combined fuel consumption
    5.9 L/100 km
    39.9 mpg US
    47.9 mpg UK
  • Lowest highway consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Best performance score
    74/100
  • Best economy score
    91/100

BMW X4 (G02) M40d

  • Quickest 0-100 km/h
    4.9 s
  • Lowest city consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Best estimated range
    1,153 km
    716 mi
  • Largest trunk
    525 L
  • Best overall score
    74/100
  • Best practicality score
    76/100

Specification comparison

Specification comparison
ModelBMW8 Series Gran Coupe (G16)840dBMWX4 (G02)M40d
Power
340hp254kW
340hp254kW
Torque
700Nm516lb-ft
700Nm516lb-ft
Curb weight
1,995kg4,398lb
2,020kg4,453lb
Gross weight
2,600kg5,732lb
2,555kg5,633lb
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
75.5s99% target: 262 km/h / 163 mph
Calculated
75.8s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
5.0s
4.9s
0-200 km/h
18.3s
Calculated
18.8s
Calculated
0-60 mph
4.7s
Calculated
4.6s
Calculated
Fuel consumption
5.9L/100 km39.9mpg US47.9mpg UK
5.9L/100 km39.9mpg US47.9mpg UK
Fuel consumption city
7.4L/100 km31.8mpg US38.2mpg UK
7.2L/100 km32.7mpg US39.2mpg UK
Fuel consumption highway
5L/100 km47mpg US56.5mpg UK
5.2L/100 km45.2mpg US54.3mpg UK
Quarter mile
13.2s
Calculated
13.1s
Calculated
Power-to-weight
170hp/t127kW/t77hp/1000 lb
Calculated
168hp/t126kW/t76hp/1000 lb
Calculated
Torque-to-weight
351Nm/t235lb-ft/ton
Calculated
347Nm/t232lb-ft/ton
Calculated
Estimated range
1,119km695mi
Calculated
1,153km716mi
Calculated
Displacement
2,993cc183cu in
2,993cc183cu in
Length
5,074mm200in
4,752mm187in
Width
1,932mm76in
1,938mm76in
Height
1,401mm55in
1,621mm64in
Wheelbase
3,023mm119in
2,864mm113in
Front track
1,627mm64in
1,615mm64in
Rear track
1,671mm66in
1,624mm64in
Ground clearance
121mm5in
204mm8in
Trunk volume
440L
525L
Max trunk volume-
1,430L
Doors
4
5
Seats
5
5
Fuel tank
66L
68L

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) 840dBMW X4 (G02) M40dPowerTorque
  • BMW 8 Series Gran Coupe (G16) 840d: Power / Torque
  • BMW X4 (G02) M40d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW8 Series Gran Coupe (G16)840d4,400 rpm1,750-2,250 rpm4,650 rpm
BMWX4 (G02)M40d4,400 rpm1,750-2,250 rpm4,650 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW8 Series Gran Coupe (G16)840dBMWX4 (G02)M40d
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
4.6 s
0-100 km/h
0-62 mph
5.0 s
4.9 s
0-200 km/h
0-124 mph
18.3 s
18.8 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
2.1 s
2.1 s
330 ft
101 m
5.7 s
5.6 s
1/8 mile
201 m
8.6 s
8.5 s
1000 ft
305 m
11.1 s
11.0 s
1/4 mile
402 m
13.2 s
13.1 s
Trap speed
1/4 mile
402 m
174 km/h
108 mph
173 km/h
107 mph

Power comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840d
340 hp
254 kW
BMWX4 (G02)M40d
340 hp
254 kW

Torque comparison

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

Chart data table
VehicleValue
BMW8 Series Gran Coupe (G16)840d
700 Nm
516 lb-ft
BMWX4 (G02)M40d
700 Nm
516 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)840d
1,995 kg
4,398 lb
BMWX4 (G02)M40d
2,020 kg
4,453 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)840d
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMWX4 (G02)M40d
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)840d5.0 s
BMWX4 (G02)M40d4.9 s

The biggest 0-100 km/h difference is between BMW X4 (G02) M40d and BMW 8 Series Gran Coupe (G16) 840d: 0.1 s.

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)840d
5.9 L/100 km
39.9 mpg US
47.9 mpg UK
BMWX4 (G02)M40d
5.9 L/100 km
39.9 mpg US
47.9 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)840d
170 hp/t
127 kW/t
5.9 kg/hp
BMWX4 (G02)M40d
168 hp/t
126 kW/t
5.9 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)840d
1,119 km
695 mi
BMWX4 (G02)M40d
1,153 km
716 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW8 Series Gran Coupe (G16)840d
340 hp
254 kW
5.0 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMWX4 (G02)M40d
340 hp
254 kW
4.9 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)840d
Power
340 hp
254 kW
0-100 km/h5.0 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
5,074 mm
199.8 in
Height
1,401 mm
55.2 in
BMWX4 (G02)M40d
Power
340 hp
254 kW
0-100 km/h4.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
525 L
18.5 cu ft
Length
4,752 mm
187.1 in
Height
1,621 mm
63.8 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)840d
Power
340 hp
254 kW
0-100 km/h5.0 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
5.9 L/100 km
39.9 mpg US
47.9 mpg UK
BMWX4 (G02)M40d
Power
340 hp
254 kW
0-100 km/h4.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
5.9 L/100 km
39.9 mpg US
47.9 mpg UK

BMW 8 Series Gran Coupe (G16) 840d 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)840d
5.9 L/100 km
39.9 mpg US
47.9 mpg UK
5.0 s
BMWX4 (G02)M40d
5.9 L/100 km
39.9 mpg US
47.9 mpg UK
4.9 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)840d
170 hp/t
127 kW/t
5.9 kg/hp
5.9 L/100 km
39.9 mpg US
47.9 mpg UK
BMWX4 (G02)M40d
168 hp/t
126 kW/t
5.9 kg/hp
5.9 L/100 km
39.9 mpg US
47.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW8 Series Gran Coupe (G16)840dBMWX4 (G02)M40d
Power
340 hp
254 kW
340 hp
254 kW
Torque
700 Nm
516 lb-ft
700 Nm
516 lb-ft
Acceleration
5.0 s
4.9 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,995 kg
4,398 lb
2,020 kg
4,453 lb
Fuel consumption
5.9 L/100 km
39.9 mpg US
47.9 mpg UK
5.9 L/100 km
39.9 mpg US
47.9 mpg UK
Practicality
Doors/seats
4 doors
5 seats
Trunk
440 L
15.5 cu ft
Length
5,074 mm
199.8 in
Height
1,401 mm
55.2 in
Doors/seats
5 doors
5 seats
Trunk
525 L
18.5 cu ft
Length
4,752 mm
187.1 in
Height
1,621 mm
63.8 in
Range score
1,119 km
695 mi
1,153 km
716 mi
Trunk score
440 L
15.5 cu ft
525 L
18.5 cu ft
Power-to-weight score
170 hp/t
127 kW/t
5.9 kg/hp
168 hp/t
126 kW/t
5.9 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) 840dBMW X4 (G02) M40d
Consumption5.9 L/100 km39.9 mpg US47.9 mpg UK5.9 L/100 km39.9 mpg US47.9 mpg UK
Cost / 100 km10.33 LC100 km10.33 LC100 km
Cost / 100 mi16.62 LC100 mi16.62 LC100 mi
Annual fuel used885 L234 US gal195 UK gal885 L234 US gal195 UK gal
Annual fuel cost1,549 LC/year1,549 LC/year

Head-to-head comparisons

BMW 8 Series Gran Coupe (G16) 840d

  • Is 25 kg lighter
  • Has 5 km/h (3 mph) higher top speed
  • Has 2 hp/t better power-to-weight

Pros

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

Cons

  • Slowest 0-100 km/h
  • Smallest trunk

BMW X4 (G02) M40d

  • Is 0.1 s quicker from 0-100 km/h
  • Has 34 km (21 mi) more estimated range
  • Has 85 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Best estimated range
  • Largest trunk

Cons

  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series Gran Coupe (G16) 840d
BMW X4 (G02) M40d
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