Car comparison

BMW 8 Series (G15) 840ivsBMW 8 Series (E31) 850Ci 5.4

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

New comparison

BMW 8 Series (G15)

840i

340 hp2998 ccGasolineAWDAutomaticTurbochargedCoupe2019-2020
VS

BMW 8 Series (E31)

850Ci 5.4

326 hp5379 ccGasolineRWDAutomaticNaturally aspiratedCoupe1994-1999

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
    4.7 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    340 hp
    254 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,770 kg
    3,902 lb
  • Best power-to-weight
    192 hp/t
    143 kW/t
    5.2 kg/hp
  • Lowest city consumption
    9.6 L/100 km
    24.5 mpg US
    29.4 mpg UK
  • Lowest highway consumption
    6.5 L/100 km
    36.2 mpg US
    43.5 mpg UK
  • Largest trunk
    420 L
  • Best overall score
    66/100
  • Best performance score
    72/100
  • Best economy score
    86/100
  • Best practicality score
    52/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)840iBMW8 Series (E31)850Ci 5.4
Power
340hp254kW
326hp243kW
Torque
500Nm369lb-ft
490Nm361lb-ft
Curb weight
1,770kg3,902lb
1,880kg4,145lb
Gross weight
2,280kg5,027lb
2,300kg5,071lb
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
66.4s99% target: 262 km/h / 163 mph
Calculated
90.9s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
4.7s
6.3s
0-200 km/h
16.7s
Calculated
22.6s
Calculated
0-60 mph
4.5s
Calculated
6.0s
Calculated
Fuel consumption
7.7L/100 km30.5mpg US36.7mpg UK
-
Fuel consumption city
9.6L/100 km24.5mpg US29.4mpg UK
21.1L/100 km11.1mpg US13.4mpg UK
Fuel consumption highway
6.5L/100 km36.2mpg US43.5mpg UK
9.9L/100 km23.8mpg US28.5mpg UK
Quarter mile
12.8s
Calculated
14.3s
Calculated
Power-to-weight
192hp/t143kW/t87hp/1000 lb
Calculated
173hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
282Nm/t189lb-ft/ton
Calculated
261Nm/t174lb-ft/ton
Calculated
Estimated range
883km549mi
Calculated
-
Displacement
2,998cc183cu in
5,379cc328cu in
Length
4,843mm191in
4,780mm188in
Width
1,902mm75in
1,855mm73in
Height
1,341mm53in
1,340mm53in
Wheelbase
2,822mm111in
2,684mm106in
Front track
1,627mm64in
1,554mm61in
Rear track
1,642mm65in
1,562mm61in
Ground clearance
121mm5in
-
Trunk volume
420L
320L
Doors
2
2
Seats
4
4
Fuel tank
68L
90L

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 8 Series (E31) 850Ci 5.4PowerTorque
  • BMW 8 Series (G15) 840i: Power / Torque
  • BMW 8 Series (E31) 850Ci 5.4: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW8 Series (G15)840i5,000-6,500 rpm1,600-4,500 rpm6,750 rpm
BMW8 Series (E31)850Ci 5.45,000 rpm3,900 rpm5,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW8 Series (G15)840iBMW8 Series (E31)850Ci 5.4
Acceleration checkpoints
0-60 mph
0-97 km/h
4.5 s
6.0 s
0-100 km/h
0-62 mph
4.7 s
6.3 s
0-200 km/h
0-124 mph
16.7 s
22.6 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.4 s
330 ft
101 m
5.6 s
6.3 s
1/8 mile
201 m
8.4 s
9.4 s
1000 ft
305 m
10.8 s
12.1 s
1/4 mile
402 m
12.8 s
14.3 s
Trap speed
1/4 mile
402 m
179 km/h
111 mph
163 km/h
101 mph

Power comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)840i
340 hp
254 kW
BMW8 Series (E31)850Ci 5.4
326 hp
243 kW

BMW 8 Series (G15) 840i has 14 hp more than BMW 8 Series (E31) 850Ci 5.4.

The biggest power difference is between BMW 8 Series (E31) 850Ci 5.4 and BMW 8 Series (G15) 840i: 14 hp (10 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
BMW8 Series (E31)850Ci 5.4
490 Nm
361 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)840i
1,770 kg
3,902 lb
BMW8 Series (E31)850Ci 5.4
1,880 kg
4,145 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
BMW8 Series (E31)850Ci 5.4
Unrestricted
265 km/h165 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 (G15)840i4.7 s
BMW8 Series (E31)850Ci 5.46.3 s

The biggest 0-100 km/h difference is between BMW 8 Series (G15) 840i and BMW 8 Series (E31) 850Ci 5.4: 1.6 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
143 kW/t
5.2 kg/hp
BMW8 Series (E31)850Ci 5.4
173 hp/t
129 kW/t
5.8 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW8 Series (G15)840i
340 hp
254 kW
4.7 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
BMW8 Series (E31)850Ci 5.4
326 hp
243 kW
6.3 s
Unrestricted
265 km/h165 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 (G15)840i
Power
340 hp
254 kW
0-100 km/h4.7 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
BMW8 Series (E31)850Ci 5.4
Power
326 hp
243 kW
0-100 km/h6.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
320 L
11.3 cu ft
Length
4,780 mm
188.2 in
Height
1,340 mm
52.8 in

Detailed score breakdown

Detailed score breakdown
VehicleBMW8 Series (G15)840iBMW8 Series (E31)850Ci 5.4
Power
340 hp
254 kW
326 hp
243 kW
Torque
500 Nm
369 lb-ft
490 Nm
361 lb-ft
Acceleration
4.7 s
6.3 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,770 kg
3,902 lb
1,880 kg
4,145 lb
Fuel consumption
7.7 L/100 km
30.5 mpg US
36.7 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
2 doors
4 seats
Trunk
320 L
11.3 cu ft
Length
4,780 mm
188.2 in
Height
1,340 mm
52.8 in
Range score
883 km
549 mi
-
Trunk score
420 L
14.8 cu ft
320 L
11.3 cu ft
Power-to-weight score
192 hp/t
143 kW/t
5.2 kg/hp
173 hp/t
129 kW/t
5.8 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
Consumption7.7 L/100 km30.5 mpg US36.7 mpg UK
Cost / 100 km13.48 LC100 km
Cost / 100 mi21.69 LC100 mi
Annual fuel used1,155 L305 US gal254 UK gal
Annual fuel cost2,021 LC/year

Head-to-head comparisons

BMW 8 Series (G15) 840i

  • Has 14 hp more
  • Has 10 Nm more
  • Is 110 kg lighter
  • Is 1.6 s quicker from 0-100 km/h
  • Has 19 hp/t better power-to-weight
  • Has 100 L more trunk volume

Pros

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series (G15) 840i
BMW 8 Series (E31) 850Ci 5.4
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2 vehicles selected

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BMW 8 Series (G15) 840i vs BMW 8 Series (E31) 850Ci 5.4 - car comparison - FastVsFaster