Car comparison

BMW 8 Series (G15) 840ivsBMW 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)

840i

333 hp2998 ccGasolineRWDAutomaticTurbochargedCoupe2020-2022
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) 840i

  • Quickest 0-100 km/h
    5.2 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,730 kg
    3,814 lb
  • Best power-to-weight
    192 hp/t
    144 kW/t
    5.2 kg/hp
  • Best overall score
    64/100
  • Best performance score
    70/100
  • Best economy score
    87/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)840iBMWi4 (G26)83.9 kWh
Power
333hp248kW
340hp254kW
Torque
500Nm369lb-ft
430Nm317lb-ft
Curb weight
1,730kg3,814lb
2,050kg4,519lb
Gross weight
2,225kg4,905lb
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
72.1s99% target: 262 km/h / 163 mph
Calculated
53.7s99% target: 203 km/h / 126 mph
Calculated
0-100 km/h
5.2s
5.7s
0-200 km/h
18.3s
Calculated
41.8s
Calculated
0-60 mph
4.9s
Calculated
5.4s
Calculated
Fuel consumption
7.3L/100 km32.2mpg US38.7mpg UK
-
Fuel consumption city
9.5L/100 km24.8mpg US29.7mpg UK
-
Fuel consumption highway
6L/100 km39.2mpg US47.1mpg UK
-
Quarter mile
13.3s
Calculated
14.1s
Calculated
Power-to-weight
192hp/t144kW/t87hp/1000 lb
Calculated
166hp/t124kW/t75hp/1000 lb
Calculated
Torque-to-weight
289Nm/t193lb-ft/ton
Calculated
210Nm/t140lb-ft/ton
Calculated
Estimated range
932km579mi
Calculated
-
Displacement
2,998cc183cu 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
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) 840iBMW i4 (G26) 83.9 kWhPowerTorque
  • BMW 8 Series (G15) 840i: Power / Torque
  • BMW i4 (G26) 83.9 kWh: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW8 Series (G15)840i5,500-6,250 rpm1,700-4,000 rpm6,500 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)840iBMWi4 (G26)83.9 kWh
Acceleration checkpoints
0-60 mph
0-97 km/h
4.9 s
5.4 s
0-100 km/h
0-62 mph
5.2 s
5.7 s
0-200 km/h
0-124 mph
18.3 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
2.2 s
2.2 s
330 ft
101 m
5.8 s
5.9 s
1/8 mile
201 m
8.7 s
9.0 s
1000 ft
305 m
11.2 s
11.7 s
1/4 mile
402 m
13.3 s
14.1 s
Trap speed
1/4 mile
402 m
174 km/h
108 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)840i
333 hp
248 kW
BMWi4 (G26)83.9 kWh
340 hp
254 kW

BMW i4 (G26) 83.9 kWh has 7 hp more than BMW 8 Series (G15) 840i.

The biggest power difference is between BMW 8 Series (G15) 840i and BMW i4 (G26) 83.9 kWh: 7 hp (5 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)840i
500 Nm
369 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)840i
1,730 kg
3,814 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)840i
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)840i5.2 s
BMWi4 (G26)83.9 kWh5.7 s

Although BMW i4 (G26) 83.9 kWh has more power, BMW 8 Series (G15) 840i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 8 Series (G15) 840i and BMW i4 (G26) 83.9 kWh: 0.5 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)840i
192 hp/t
144 kW/t
5.2 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)840i
333 hp
248 kW
5.2 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)840i
Power
333 hp
248 kW
0-100 km/h5.2 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)840iBMWi4 (G26)83.9 kWh
Power
333 hp
248 kW
340 hp
254 kW
Torque
500 Nm
369 lb-ft
430 Nm
317 lb-ft
Acceleration
5.2 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
1,730 kg
3,814 lb
2,050 kg
4,519 lb
Fuel consumption
7.3 L/100 km
32.2 mpg US
38.7 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
932 km
579 mi
-
Trunk score
420 L
14.8 cu ft
470 L
16.6 cu ft
Power-to-weight score
192 hp/t
144 kW/t
5.2 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) 840i
Consumption7.3 L/100 km32.2 mpg US38.7 mpg UK
Cost / 100 km12.78 LC100 km
Cost / 100 mi20.56 LC100 mi
Annual fuel used1,095 L289 US gal241 UK gal
Annual fuel cost1,916 LC/year

Head-to-head comparisons

BMW 8 Series (G15) 840i

  • Has 70 Nm more
  • Is 320 kg lighter
  • Is 0.5 s quicker from 0-100 km/h
  • Has 60 km/h (37 mph) higher top speed
  • Has 27 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power
  • Smallest trunk

BMW i4 (G26) 83.9 kWh

  • Has 7 hp more
  • Has 50 L more trunk volume

Pros

  • Most powerful
  • 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) 840i
BMW i4 (G26) 83.9 kWh
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BMW 8 Series (G15) 840i vs BMW i4 (G26) 83.9 kWh - car comparison - FastVsFaster