Car comparison

BMW 8 Series (G15) 840dvsBMW 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)

840d

320 hp2993 ccDieselAWDAutomaticTurbochargedCoupe2018-2020
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) 840d

  • Quickest 0-100 km/h
    4.9 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Highest torque
    680 Nm
    502 lb-ft
  • Lightest
    1,830 kg
    4,034 lb
  • Best power-to-weight
    175 hp/t
    130 kW/t
    5.7 kg/hp
  • Lowest city consumption
    7.6 L/100 km
    30.9 mpg US
    37.2 mpg UK
  • Lowest highway consumption
    5.4 L/100 km
    43.6 mpg US
    52.3 mpg UK
  • Largest trunk
    420 L
  • Best overall score
    67/100
  • Best performance score
    74/100
  • Best economy score
    90/100
  • Best practicality score
    52/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)840dBMW8 Series (E31)850Ci 5.4
Power
320hp239kW
326hp243kW
Torque
680Nm502lb-ft
490Nm361lb-ft
Curb weight
1,830kg4,034lb
1,880kg4,145lb
Gross weight
2,370kg5,225lb
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
70.4s99% target: 262 km/h / 163 mph
Calculated
90.9s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
4.9s
6.3s
0-200 km/h
17.5s
Calculated
22.6s
Calculated
0-60 mph
4.7s
Calculated
6.0s
Calculated
Fuel consumption
6.2L/100 km37.9mpg US45.6mpg UK
-
Fuel consumption city
7.6L/100 km30.9mpg US37.2mpg UK
21.1L/100 km11.1mpg US13.4mpg UK
Fuel consumption highway
5.4L/100 km43.6mpg US52.3mpg UK
9.9L/100 km23.8mpg US28.5mpg UK
Quarter mile
13.0s
Calculated
14.3s
Calculated
Power-to-weight
175hp/t130kW/t79hp/1000 lb
Calculated
173hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
372Nm/t249lb-ft/ton
Calculated
261Nm/t174lb-ft/ton
Calculated
Estimated range
1,097km682mi
Calculated
-
Displacement
2,993cc183cu 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
CO2 emissions
164g/km
-

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 8 Series (E31) 850Ci 5.4PowerTorque
  • BMW 8 Series (G15) 840d: 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)840d4,400 rpm1,750-2,250 rpm4,650 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)840dBMW8 Series (E31)850Ci 5.4
Acceleration checkpoints
0-60 mph
0-97 km/h
4.7 s
6.0 s
0-100 km/h
0-62 mph
4.9 s
6.3 s
0-200 km/h
0-124 mph
17.5 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
8.5 s
9.4 s
1000 ft
305 m
11.0 s
12.1 s
1/4 mile
402 m
13.0 s
14.3 s
Trap speed
1/4 mile
402 m
176 km/h
109 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)840d
320 hp
239 kW
BMW8 Series (E31)850Ci 5.4
326 hp
243 kW

BMW 8 Series (E31) 850Ci 5.4 has 6 hp more than BMW 8 Series (G15) 840d.

The biggest power difference is between BMW 8 Series (G15) 840d and BMW 8 Series (E31) 850Ci 5.4: 6 hp (4 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)840d
680 Nm
502 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)840d
1,830 kg
4,034 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)840d
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)840d4.9 s
BMW8 Series (E31)850Ci 5.46.3 s

Although BMW 8 Series (E31) 850Ci 5.4 has more power, BMW 8 Series (G15) 840d is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 8 Series (G15) 840d and BMW 8 Series (E31) 850Ci 5.4: 1.4 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
175 hp/t
130 kW/t
5.7 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)840d
320 hp
239 kW
4.9 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)840d
Power
320 hp
239 kW
0-100 km/h4.9 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)840dBMW8 Series (E31)850Ci 5.4
Power
320 hp
239 kW
326 hp
243 kW
Torque
680 Nm
502 lb-ft
490 Nm
361 lb-ft
Acceleration
4.9 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
1,830 kg
4,034 lb
1,880 kg
4,145 lb
Fuel consumption
6.2 L/100 km
37.9 mpg US
45.6 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
1,097 km
682 mi
-
CO2 score
164 g/km
-
Trunk score
420 L
14.8 cu ft
320 L
11.3 cu ft
Power-to-weight score
175 hp/t
130 kW/t
5.7 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) 840d
Consumption6.2 L/100 km37.9 mpg US45.6 mpg UK
Cost / 100 km10.85 LC100 km
Cost / 100 mi17.46 LC100 mi
Annual fuel used930 L246 US gal205 UK gal
Annual fuel cost1,628 LC/year

Head-to-head comparisons

BMW 8 Series (G15) 840d

  • Has 190 Nm more
  • Is 50 kg lighter
  • Is 1.4 s quicker from 0-100 km/h
  • Has 1 hp/t better power-to-weight
  • Has 100 L more trunk volume

Pros

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

Cons

  • Lowest power

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series (G15) 840d
BMW 8 Series (E31) 850Ci 5.4
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BMW 8 Series (G15) 840d vs BMW 8 Series (E31) 850Ci 5.4 - car comparison - FastVsFaster