Car comparison

BMW 8 Series (G15) 840dvsBMW i4 (G26) 83.9 kWh

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 i4 (G26)

83.9 kWh

340 hpElectricRWDAutomaticCoupe2021-2024

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
  • Best overall score
    68/100
  • Best performance score
    75/100
  • Best economy score
    91/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)840dBMWi4 (G26)83.9 kWh
Power
340hp254kW
340hp254kW
Torque
700Nm516lb-ft
430Nm317lb-ft
Curb weight
1,915kg4,222lb
2,050kg4,519lb
Gross weight
2,410kg5,313lb
2,605kg5,743lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
205 km/h127 mph
Restricted
190 km/h118 mph
Calculated
To 99% top speed
69.3s99% target: 262 km/h / 163 mph
Calculated
53.7s99% target: 203 km/h / 126 mph
Calculated
0-100 km/h
4.8s
5.7s
0-200 km/h
17.2s
Calculated
41.8s
Calculated
0-60 mph
4.6s
Calculated
5.4s
Calculated
Fuel consumption
5.8L/100 km40.6mpg US48.7mpg UK
-
Fuel consumption city
7.3L/100 km32.2mpg US38.7mpg UK
-
Fuel consumption highway
5L/100 km47mpg US56.5mpg UK
-
Quarter mile
12.9s
Calculated
14.1s
Calculated
Power-to-weight
178hp/t132kW/t81hp/1000 lb
Calculated
166hp/t124kW/t75hp/1000 lb
Calculated
Torque-to-weight
366Nm/t245lb-ft/ton
Calculated
210Nm/t140lb-ft/ton
Calculated
Estimated range
1,138km707mi
Calculated
-
Displacement
2,993cc183cu in
-
Length
4,843mm191in
4,783mm188in
Width
1,902mm75in
1,852mm73in
Height
1,341mm53in
1,448mm57in
Wheelbase
2,822mm111in
2,856mm112in
Front track
1,627mm64in
1,601mm63in
Rear track
1,642mm65in
1,630mm64in
Ground clearance
121mm5in
125mm5in
Trunk volume
420L
470L
Max trunk volume-
1,290L
Doors
2
5
Seats
4
5
Fuel tank
66L
-

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 i4 (G26) 83.9 kWhPowerTorque
  • BMW 8 Series (G15) 840d: Power / Torque
  • BMW i4 (G26) 83.9 kWh: 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
BMWi4 (G26)83.9 kWh8,000-17,000 rpm0-5,000 rpm16,000 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW8 Series (G15)840dBMWi4 (G26)83.9 kWh
Acceleration checkpoints
0-60 mph
0-97 km/h
4.6 s
5.4 s
0-100 km/h
0-62 mph
4.8 s
5.7 s
0-200 km/h
0-124 mph
17.2 s
41.8 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
205 km/h127 mph
Restricted
190 km/h118 mph
Limited
Drag race simulation
60 ft
18 m
2.1 s
2.2 s
330 ft
101 m
5.6 s
5.9 s
1/8 mile
201 m
8.4 s
9.0 s
1000 ft
305 m
10.9 s
11.7 s
1/4 mile
402 m
12.9 s
14.1 s
Trap speed
1/4 mile
402 m
177 km/h
110 mph
157 km/h
98 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
BMWi4 (G26)83.9 kWh
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
BMWi4 (G26)83.9 kWh
430 Nm
317 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
BMWi4 (G26)83.9 kWh
2,050 kg
4,519 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
BMWi4 (G26)83.9 kWh
Unrestricted
205 km/h127 mph
Restricted
190 km/h118 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
BMWi4 (G26)83.9 kWh5.7 s

The biggest 0-100 km/h difference is between BMW 8 Series (G15) 840d and BMW i4 (G26) 83.9 kWh: 0.9 s.

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
BMWi4 (G26)83.9 kWh
166 hp/t
124 kW/t
6.0 kg/hp

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
BMWi4 (G26)83.9 kWh
340 hp
254 kW
5.7 s
Unrestricted
205 km/h127 mph
Restricted
190 km/h118 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
BMWi4 (G26)83.9 kWh
Power
340 hp
254 kW
0-100 km/h5.7 s
Top speed
Unrestricted
205 km/h127 mph
Restricted
190 km/h118 mph
Doors/seats
5 doors
5 seats
Trunk
470 L
16.6 cu ft
Length
4,783 mm
188.3 in
Height
1,448 mm
57.0 in

Detailed score breakdown

Detailed score breakdown
VehicleBMW8 Series (G15)840dBMWi4 (G26)83.9 kWh
Power
340 hp
254 kW
340 hp
254 kW
Torque
700 Nm
516 lb-ft
430 Nm
317 lb-ft
Acceleration
4.8 s
5.7 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
205 km/h127 mph
Restricted
190 km/h118 mph
Lightness
1,915 kg
4,222 lb
2,050 kg
4,519 lb
Fuel consumption
5.8 L/100 km
40.6 mpg US
48.7 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
470 L
16.6 cu ft
Length
4,783 mm
188.3 in
Height
1,448 mm
57.0 in
Range score
1,138 km
707 mi
-
Trunk score
420 L
14.8 cu ft
470 L
16.6 cu ft
Power-to-weight score
178 hp/t
132 kW/t
5.6 kg/hp
166 hp/t
124 kW/t
6.0 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) 840d
Consumption5.8 L/100 km40.6 mpg US48.7 mpg UK
Cost / 100 km10.15 LC100 km
Cost / 100 mi16.33 LC100 mi
Annual fuel used870 L230 US gal191 UK gal
Annual fuel cost1,523 LC/year

Head-to-head comparisons

BMW 8 Series (G15) 840d

  • Has 270 Nm more
  • Is 135 kg lighter
  • Is 0.9 s quicker from 0-100 km/h
  • Has 60 km/h (37 mph) higher top speed
  • Has 12 hp/t better power-to-weight

Pros

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

Cons

  • Smallest trunk

BMW i4 (G26) 83.9 kWh

  • Has 50 L more trunk volume

Pros

  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest
  • Lowest top speed

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series (G15) 840d
BMW i4 (G26) 83.9 kWh
Compare selected cars
2 vehicles selected

Popular comparisons

840d
840d
VS
BMW8 Series (G15)840dvsBMW8 Series Gran Coupe (G16)840d
83.9 kWh
M440d
VS
BMWi4 (G26)83.9 kWhvsBMW4 Series Coupe (G22)M440d
840d
850Ci 5.4
VS
BMW8 Series (G15)840dvsBMW8 Series (E31)850Ci 5.4
83.9 kWh
840i
VS
BMWi4 (G26)83.9 kWhvsBMW8 Series (G15)840i
840d
440i
VS
BMW8 Series (G15)840dvsBMW4 Series Gran Coupe (F36)Facelift 2017440i
83.9 kWh
M440i
VS
BMWi4 (G26)83.9 kWhvsBMW4 Series Gran Coupe (G26)M440i
840d
M235i
VS
BMW8 Series (G15)840dvsBMW2 Series Gran Coupe (F44)M235i
840d
440i
VS
BMW8 Series (G15)840dvsBMW4 Series Coupe (F32)Facelift 2017440i
83.9 kWh
M240i
VS
BMWi4 (G26)83.9 kWhvsBMW2 Series Coupe (G42)M240i
83.9 kWh
M235
VS
BMWi4 (G26)83.9 kWhvsBMW2 Series Gran Coupe (F74)M235
840d
M240i
VS
BMW8 Series (G15)840dvsBMW2 Series Coupe (F22)M240i
83.9 kWh
3.0 V6
VS
BMWi4 (G26)83.9 kWhvsPorscheCayenne IIIFacelift 20233.0 V6
BMW 8 Series (G15) 840d vs BMW i4 (G26) 83.9 kWh - car comparison - FastVsFaster