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

340 hp2993 ccDieselAWDAutomaticTurbochargedCoupe2020-2022
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
    4.8 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
  • Best power-to-weight
    178 hp/t
    132 kW/t
    5.6 kg/hp
  • Lowest city consumption
    7.3 L/100 km
    32.2 mpg US
    38.7 mpg UK
  • Lowest highway consumption
    5.0 L/100 km
    47.0 mpg US
    56.5 mpg UK
  • Largest trunk
    420 L
  • Best overall score
    68/100
  • Best performance score
    75/100
  • Best economy score
    91/100
  • Best practicality score
    52/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)840dBMW8 Series (E31)850Ci 5.4
Power
340hp254kW
326hp243kW
Torque
700Nm516lb-ft
490Nm361lb-ft
Curb weight
1,915kg4,222lb
1,880kg4,145lb
Gross weight
2,410kg5,313lb
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
69.3s99% target: 262 km/h / 163 mph
Calculated
90.9s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
4.8s
6.3s
0-200 km/h
17.2s
Calculated
22.6s
Calculated
0-60 mph
4.6s
Calculated
6.0s
Calculated
Fuel consumption
5.8L/100 km40.6mpg US48.7mpg UK
-
Fuel consumption city
7.3L/100 km32.2mpg US38.7mpg UK
21.1L/100 km11.1mpg US13.4mpg UK
Fuel consumption highway
5L/100 km47mpg US56.5mpg UK
9.9L/100 km23.8mpg US28.5mpg UK
Quarter mile
12.9s
Calculated
14.3s
Calculated
Power-to-weight
178hp/t132kW/t81hp/1000 lb
Calculated
173hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
366Nm/t245lb-ft/ton
Calculated
261Nm/t174lb-ft/ton
Calculated
Estimated range
1,138km707mi
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
66L
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) 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
4.6 s
6.0 s
0-100 km/h
0-62 mph
4.8 s
6.3 s
0-200 km/h
0-124 mph
17.2 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
10.9 s
12.1 s
1/4 mile
402 m
12.9 s
14.3 s
Trap speed
1/4 mile
402 m
177 km/h
110 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
340 hp
254 kW
BMW8 Series (E31)850Ci 5.4
326 hp
243 kW

BMW 8 Series (G15) 840d 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) 840d: 14 hp (10 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
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
1,915 kg
4,222 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)840d4.8 s
BMW8 Series (E31)850Ci 5.46.3 s

The biggest 0-100 km/h difference is between BMW 8 Series (G15) 840d and BMW 8 Series (E31) 850Ci 5.4: 1.5 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)840d
178 hp/t
132 kW/t
5.6 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
340 hp
254 kW
4.8 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
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
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
340 hp
254 kW
326 hp
243 kW
Torque
700 Nm
516 lb-ft
490 Nm
361 lb-ft
Acceleration
4.8 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
1,915 kg
4,222 lb
1,880 kg
4,145 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
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
1,138 km
707 mi
-
Trunk score
420 L
14.8 cu ft
320 L
11.3 cu ft
Power-to-weight score
178 hp/t
132 kW/t
5.6 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
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 14 hp more
  • Has 210 Nm more
  • Is 1.5 s quicker from 0-100 km/h
  • Has 4 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
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Heaviest

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