Car comparison

BMW 8 Series (G15) 840dvsBMW X3 (G01) M40d

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

New comparison

BMW 8 Series (G15)

840d

340 hp2993 ccDieselAWDAutomaticTurbochargedCoupe2020-2022
VS

BMW X3 (G01)

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 (G15) 840d

  • Quickest 0-100 km/h
    4.8 s
  • 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
    1,915 kg
    4,222 lb
  • Best power-to-weight
    178 hp/t
    132 kW/t
    5.6 kg/hp
  • Lowest combined fuel consumption
    5.8 L/100 km
    40.6 mpg US
    48.7 mpg UK
  • Lowest highway consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Best estimated range
    1,138 km
    707 mi
  • Best performance score
    75/100
  • Best economy score
    91/100

BMW X3 (G01) M40d

  • Lowest city consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Largest trunk
    550 L
  • Best overall score
    74/100
  • Best practicality score
    77/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)840dBMWX3 (G01)M40d
Power
340hp254kW
340hp254kW
Torque
700Nm516lb-ft
700Nm516lb-ft
Curb weight
1,915kg4,222lb
2,020kg4,453lb
Gross weight
2,410kg5,313lb
2,560kg5,644lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
250 km/h
155 mph
To 99% top speed
69.3s99% target: 262 km/h / 163 mph
Calculated
73.2s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
4.8s
4.9s
0-200 km/h
17.2s
Calculated
20.1s
Calculated
0-60 mph
4.6s
Calculated
4.6s
Calculated
Fuel consumption
5.8L/100 km40.6mpg US48.7mpg UK
6L/100 km39.2mpg US47.1mpg UK
Fuel consumption city
7.3L/100 km32.2mpg US38.7mpg 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
12.9s
Calculated
13.2s
Calculated
Power-to-weight
178hp/t132kW/t81hp/1000 lb
Calculated
168hp/t126kW/t76hp/1000 lb
Calculated
Torque-to-weight
366Nm/t245lb-ft/ton
Calculated
347Nm/t232lb-ft/ton
Calculated
Estimated range
1,138km707mi
Calculated
1,133km704mi
Calculated
Displacement
2,993cc183cu in
2,993cc183cu in
Length
4,843mm191in
4,716mm186in
Width
1,902mm75in
1,897mm75in
Height
1,341mm53in
1,676mm66in
Wheelbase
2,822mm111in
2,864mm113in
Front track
1,627mm64in
1,615mm64in
Rear track
1,642mm65in
1,594mm63in
Ground clearance
121mm5in
204mm8in
Trunk volume
420L
550L
Max trunk volume-
1,600L
Doors
2
5
Seats
4
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 (G15) 840dBMW X3 (G01) M40dPowerTorque
  • BMW 8 Series (G15) 840d: Power / Torque
  • BMW X3 (G01) M40d: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW8 Series (G15)840d4,400 rpm1,750-2,250 rpm4,650 rpm
BMWX3 (G01)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 (G15)840dBMWX3 (G01)M40d
Acceleration checkpoints
0-60 mph
0-97 km/h
4.6 s
4.6 s
0-100 km/h
0-62 mph
4.8 s
4.9 s
0-200 km/h
0-124 mph
17.2 s
20.1 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
250 km/h
155 mph
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.6 s
5.6 s
1/8 mile
201 m
8.4 s
8.5 s
1000 ft
305 m
10.9 s
11.0 s
1/4 mile
402 m
12.9 s
13.2 s
Trap speed
1/4 mile
402 m
177 km/h
110 mph
170 km/h
106 mph

Power comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)840d
340 hp
254 kW
BMWX3 (G01)M40d
340 hp
254 kW

Torque comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)840d
700 Nm
516 lb-ft
BMWX3 (G01)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 (G15)840d
1,915 kg
4,222 lb
BMWX3 (G01)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 (G15)840d
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMWX3 (G01)M40d
250 km/h
155 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)840d4.8 s
BMWX3 (G01)M40d4.9 s

The biggest 0-100 km/h difference is between BMW 8 Series (G15) 840d and BMW X3 (G01) M40d: 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 (G15)840d
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
BMWX3 (G01)M40d
6.0 L/100 km
39.2 mpg US
47.1 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 (G15)840d
178 hp/t
132 kW/t
5.6 kg/hp
BMWX3 (G01)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 (G15)840d
1,138 km
707 mi
BMWX3 (G01)M40d
1,133 km
704 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW8 Series (G15)840d
340 hp
254 kW
4.8 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMWX3 (G01)M40d
340 hp
254 kW
4.9 s
250 km/h
155 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 (G15)840d
Power
340 hp
254 kW
0-100 km/h4.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
420 L
14.8 cu ft
Length
4,843 mm
190.7 in
Height
1,341 mm
52.8 in
BMWX3 (G01)M40d
Power
340 hp
254 kW
0-100 km/h4.9 s
Top speed
250 km/h
155 mph
Doors/seats
5 doors
5 seats
Trunk
550 L
19.4 cu ft
Length
4,716 mm
185.7 in
Height
1,676 mm
66.0 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 (G15)840d
Power
340 hp
254 kW
0-100 km/h4.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
BMWX3 (G01)M40d
Power
340 hp
254 kW
0-100 km/h4.9 s
Top speed
250 km/h
155 mph
6.0 L/100 km
39.2 mpg US
47.1 mpg UK

BMW 8 Series (G15) 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 (G15)840d
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
4.8 s
BMWX3 (G01)M40d
6.0 L/100 km
39.2 mpg US
47.1 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 (G15)840d
178 hp/t
132 kW/t
5.6 kg/hp
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
BMWX3 (G01)M40d
168 hp/t
126 kW/t
5.9 kg/hp
6.0 L/100 km
39.2 mpg US
47.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW8 Series (G15)840dBMWX3 (G01)M40d
Power
340 hp
254 kW
340 hp
254 kW
Torque
700 Nm
516 lb-ft
700 Nm
516 lb-ft
Acceleration
4.8 s
4.9 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
250 km/h
155 mph
Lightness
1,915 kg
4,222 lb
2,020 kg
4,453 lb
Fuel consumption
5.8 L/100 km
40.6 mpg US
48.7 mpg UK
6.0 L/100 km
39.2 mpg US
47.1 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
420 L
14.8 cu ft
Length
4,843 mm
190.7 in
Height
1,341 mm
52.8 in
Doors/seats
5 doors
5 seats
Trunk
550 L
19.4 cu ft
Length
4,716 mm
185.7 in
Height
1,676 mm
66.0 in
Range score
1,138 km
707 mi
1,133 km
704 mi
Trunk score
420 L
14.8 cu ft
550 L
19.4 cu ft
Power-to-weight score
178 hp/t
132 kW/t
5.6 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 (G15) 840dBMW X3 (G01) M40d
Consumption5.8 L/100 km40.6 mpg US48.7 mpg UK6 L/100 km39.2 mpg US47.1 mpg UK
Cost / 100 km10.15 LC100 km10.50 LC100 km
Cost / 100 mi16.33 LC100 mi16.90 LC100 mi
Annual fuel used870 L230 US gal191 UK gal900 L238 US gal198 UK gal
Annual fuel cost1,523 LC/year1,575 LC/year

Head-to-head comparisons

BMW 8 Series (G15) 840d

  • Is 105 kg lighter
  • Is 0.1 s quicker from 0-100 km/h
  • Has 15 km/h (9 mph) higher top speed
  • Uses 0.2 L/100 km less fuel
  • Has 9 hp/t better power-to-weight
  • Has 5 km (3 mi) more estimated range

Pros

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

Cons

  • Smallest trunk

BMW X3 (G01) M40d

  • Has 130 L more trunk volume

Pros

  • Largest trunk

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series (G15) 840d
BMW X3 (G01) M40d
Compare selected cars
2 vehicles selected

Popular comparisons

840d
840d
VS
BMW8 Series (G15)840dvsBMW8 Series Gran Coupe (G16)840d
M40d
M40d
VS
BMWX3 (G01)M40dvsBMWX3 (G01 LCI)Facelift 2021M40d
840d
850Ci 5.4
VS
BMW8 Series (G15)840dvsBMW8 Series (E31)850Ci 5.4
M40d
M50
VS
BMWX3 (G01)M40dvsBMWX3 (G45)M50
840d
M440d
VS
BMW8 Series (G15)840dvsBMW4 Series Coupe (G22)M440d
M40d
35d
VS
BMWX3 (G01)M40dvsBMWX3 (F25 LCI)Facelift 201435d
840d
440i
VS
BMW8 Series (G15)840dvsBMW4 Series Gran Coupe (F36)Facelift 2017440i
M40d
35d
VS
BMWX3 (G01)M40dvsBMWX3 (F25)35d
840d
M235i
VS
BMW8 Series (G15)840dvsBMW2 Series Gran Coupe (F44)M235i
M40d
35d
VS
BMWX3 (G01)M40dvsBMWX3 (E83)Facelift 200635d
840d
440i
VS
BMW8 Series (G15)840dvsBMW4 Series Coupe (F32)Facelift 2017440i
M40d
3.0i
VS
BMWX3 (G01)M40dvsBMWX3 (E83)3.0i
BMW 8 Series (G15) 840d vs BMW X3 (G01) M40d - car comparison - FastVsFaster