Car comparison

BMW 8 Series (G15) M850ivsRolls-Royce Spectre 102 kWh

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

New comparison

BMW 8 Series (G15)

M850i

530 hp4395 ccGasolineAWDAutomaticTurbochargedCoupe2020-2022
VS

Rolls-Royce Spectre

102 kWh

584 hpElectricAWDAutomaticCoupe2023-present

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

BMW 8 Series (G15) M850i

  • Quickest 0-100 km/h
    3.8 s
  • Fastest top speed
    265 km/h
    165 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,930 kg
    4,255 lb
  • Best power-to-weight
    275 hp/t
    205 kW/t
    3.6 kg/hp
  • Best overall score
    75/100
  • Best performance score
    86/100
  • Best economy score
    80/100

Specification comparison

Specification comparison
ModelBMW8 Series (G15)M850iRolls-RoyceSpectre102 kWh
Power
530hp395kW
584hp435kW
Torque
750Nm553lb-ft
900Nm664lb-ft
Curb weight
1,930kg4,255lb
2,890kg6,371lb
Gross weight
2,395kg5,280lb
-
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
49.9s99% target: 262 km/h / 163 mph
Calculated
71.4s99% target: 262 km/h / 163 mph
Calculated
0-100 km/h
3.8s
4.5s
0-200 km/h
13.0s
Calculated
16.9s
Calculated
0-60 mph
3.6s
Calculated
4.3s
Calculated
Fuel consumption
10L/100 km23.5mpg US28.2mpg UK
-
Fuel consumption city
14L/100 km16.8mpg US20.2mpg UK
-
Fuel consumption highway
7.7L/100 km30.5mpg US36.7mpg UK
-
Quarter mile
11.8s
Calculated
12.7s
Calculated
Power-to-weight
275hp/t205kW/t125hp/1000 lb
Calculated
202hp/t151kW/t92hp/1000 lb
Calculated
Torque-to-weight
389Nm/t260lb-ft/ton
Calculated
311Nm/t208lb-ft/ton
Calculated
Estimated range
680km423mi
Calculated
-
Displacement
4,395cc268cu in
-
Length
4,851mm191in
5,475mm216in
Width
1,902mm75in
2,017mm79in
Height
1,346mm53in
1,573mm62in
Wheelbase
2,822mm111in
3,210mm126in
Front track
1,627mm64in
-
Rear track
1,642mm65in
-
Ground clearance
128mm5in
-
Trunk volume
420L
-
Doors
2
2
Seats
4
4
Fuel tank
68L
-

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW8 Series (G15)M850iRolls-RoyceSpectre102 kWh
Acceleration checkpoints
0-60 mph
0-97 km/h
3.6 s
4.3 s
0-100 km/h
0-62 mph
3.8 s
4.5 s
0-200 km/h
0-124 mph
13.0 s
16.9 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
1.9 s
2.0 s
330 ft
101 m
5.1 s
5.4 s
1/8 mile
201 m
7.7 s
8.2 s
1000 ft
305 m
9.9 s
10.7 s
1/4 mile
402 m
11.8 s
12.7 s
Trap speed
1/4 mile
402 m
192 km/h
119 mph
178 km/h
111 mph

Power comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)M850i
530 hp
395 kW
Rolls-RoyceSpectre102 kWh
584 hp
435 kW

Rolls-Royce Spectre 102 kWh has 54 hp more than BMW 8 Series (G15) M850i.

The biggest power difference is between BMW 8 Series (G15) M850i and Rolls-Royce Spectre 102 kWh: 54 hp (40 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)M850i
750 Nm
553 lb-ft
Rolls-RoyceSpectre102 kWh
900 Nm
664 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW8 Series (G15)M850i
1,930 kg
4,255 lb
Rolls-RoyceSpectre102 kWh
2,890 kg
6,371 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)M850i
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Rolls-RoyceSpectre102 kWh
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)M850i3.8 s
Rolls-RoyceSpectre102 kWh4.5 s

Although Rolls-Royce Spectre 102 kWh has more power, BMW 8 Series (G15) M850i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 8 Series (G15) M850i and Rolls-Royce Spectre 102 kWh: 0.7 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)M850i
275 hp/t
205 kW/t
3.6 kg/hp
Rolls-RoyceSpectre102 kWh
202 hp/t
151 kW/t
4.9 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW8 Series (G15)M850i
530 hp
395 kW
3.8 s
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Rolls-RoyceSpectre102 kWh
584 hp
435 kW
4.5 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)M850i
Power
530 hp
395 kW
0-100 km/h3.8 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
4,851 mm
191.0 in
Height
1,346 mm
53.0 in
Rolls-RoyceSpectre102 kWh
Power
584 hp
435 kW
0-100 km/h4.5 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk-
Length
5,475 mm
215.6 in
Height
1,573 mm
61.9 in

Detailed score breakdown

Detailed score breakdown
VehicleBMW8 Series (G15)M850iRolls-RoyceSpectre102 kWh
Power
530 hp
395 kW
584 hp
435 kW
Torque
750 Nm
553 lb-ft
900 Nm
664 lb-ft
Acceleration
3.8 s
4.5 s
Top speed
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Unrestricted
265 km/h165 mph
Restricted
250 km/h155 mph
Lightness
1,930 kg
4,255 lb
2,890 kg
6,371 lb
Fuel consumption
10.0 L/100 km
23.5 mpg US
28.2 mpg UK
-
Practicality
Doors/seats
2 doors
4 seats
Trunk
420 L
14.8 cu ft
Length
4,851 mm
191.0 in
Height
1,346 mm
53.0 in
Doors/seats
2 doors
4 seats
Trunk-
Length
5,475 mm
215.6 in
Height
1,573 mm
61.9 in
Range score
680 km
423 mi
-
Trunk score
420 L
14.8 cu ft
-
Power-to-weight score
275 hp/t
205 kW/t
3.6 kg/hp
202 hp/t
151 kW/t
4.9 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) M850i
Consumption10 L/100 km23.5 mpg US28.2 mpg UK
Cost / 100 km17.50 LC100 km
Cost / 100 mi28.16 LC100 mi
Annual fuel used1,500 L396 US gal330 UK gal
Annual fuel cost2,625 LC/year

Head-to-head comparisons

BMW 8 Series (G15) M850i

  • Is 960 kg lighter
  • Is 0.7 s quicker from 0-100 km/h
  • Has 73 hp/t better power-to-weight

Pros

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

Cons

  • Lowest power

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 8 Series (G15) M850i
Rolls-Royce Spectre 102 kWh
Compare selected cars
2 vehicles selected

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BMW 8 Series (G15) M850i vs Rolls-Royce Spectre 102 kWh - car comparison - FastVsFaster