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

333 hp2998 ccGasolineAWDAutomaticTurbochargedCoupe2020-2022
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) 840i

  • Quickest 0-100 km/h
    4.9 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    333 hp
    248 kW
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,795 kg
    3,957 lb
  • Best power-to-weight
    186 hp/t
    138 kW/t
    5.4 kg/hp
  • Lowest city consumption
    9.9 L/100 km
    23.8 mpg US
    28.5 mpg UK
  • Lowest highway consumption
    6.6 L/100 km
    35.6 mpg US
    42.8 mpg UK
  • Largest trunk
    420 L
  • Best overall score
    65/100
  • Best performance score
    71/100
  • Best economy score
    86/100
  • Best practicality score
    52/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)840iBMW8 Series (E31)850Ci 5.4
Power
333hp248kW
326hp243kW
Torque
500Nm369lb-ft
490Nm361lb-ft
Curb weight
1,795kg3,957lb
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
70.1s99% 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
7.8L/100 km30.2mpg US36.2mpg UK
-
Fuel consumption city
9.9L/100 km23.8mpg US28.5mpg UK
21.1L/100 km11.1mpg US13.4mpg UK
Fuel consumption highway
6.6L/100 km35.6mpg US42.8mpg UK
9.9L/100 km23.8mpg US28.5mpg UK
Quarter mile
13.0s
Calculated
14.3s
Calculated
Power-to-weight
186hp/t138kW/t84hp/1000 lb
Calculated
173hp/t129kW/t79hp/1000 lb
Calculated
Torque-to-weight
279Nm/t186lb-ft/ton
Calculated
261Nm/t174lb-ft/ton
Calculated
Estimated range
872km542mi
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)840i5,500-6,250 rpm1,700-4,000 rpm6,500 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
4.7 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
5.7 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
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)840i
333 hp
248 kW
BMW8 Series (E31)850Ci 5.4
326 hp
243 kW

BMW 8 Series (G15) 840i has 7 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: 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
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
1,795 kg
3,957 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)840i4.9 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: 1.4 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)840i
186 hp/t
138 kW/t
5.4 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
333 hp
248 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)840i
Power
333 hp
248 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)840iBMW8 Series (E31)850Ci 5.4
Power
333 hp
248 kW
326 hp
243 kW
Torque
500 Nm
369 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
1,795 kg
3,957 lb
1,880 kg
4,145 lb
Fuel consumption
7.8 L/100 km
30.2 mpg US
36.2 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
872 km
542 mi
-
Trunk score
420 L
14.8 cu ft
320 L
11.3 cu ft
Power-to-weight score
186 hp/t
138 kW/t
5.4 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
Consumption7.8 L/100 km30.2 mpg US36.2 mpg UK
Cost / 100 km13.65 LC100 km
Cost / 100 mi21.97 LC100 mi
Annual fuel used1,170 L309 US gal257 UK gal
Annual fuel cost2,048 LC/year

Head-to-head comparisons

BMW 8 Series (G15) 840i

  • Has 7 hp more
  • Has 10 Nm more
  • Is 85 kg lighter
  • Is 1.4 s quicker from 0-100 km/h
  • Has 12 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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BMW 8 Series (G15) 840i vs BMW 8 Series (E31) 850Ci 5.4 - car comparison - FastVsFaster