Car comparison

BMW M4 Convertible (F83) 3.0vsRolls-Royce Phantom Drophead Coupe · Facelift 2012 6.7 V12

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

New comparison

BMW M4 Convertible (F83)

3.0

431 hp2979 ccGasolineRWDManualTurbochargedCabriolet / convertible2014-2020
VS

Rolls-Royce Phantom Drophead Coupe · Facelift 2012

6.7 V12

460 hp6749 ccGasolineRWDAutomaticNaturally aspiratedCabriolet / convertible2012-2016

Comparison overview

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

Best choices

BMW M4 Convertible (F83) 3.0

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lightest
    1,750 kg
    3,858 lb
  • Best power-to-weight
    246 hp/t
    184 kW/t
    4.1 kg/hp
  • Lowest combined fuel consumption
    9.1 L/100 km
    25.8 mpg US
    31.0 mpg UK
  • Lowest city consumption
    12.4 L/100 km
    19.0 mpg US
    22.8 mpg UK
  • Lowest highway consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Lowest CO2 emissions
    213 g/km
  • Best estimated range
    659 km
    410 mi
  • Best performance score
    76/100
  • Best economy score
    82/100

Specification comparison

Specification comparison
ModelBMWM4 Convertible (F83)3.0Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
Power
431hp321kW
460hp343kW
Torque
550Nm406lb-ft
720Nm531lb-ft
Curb weight
1,750kg3,858lb
2,630kg5,798lb
Gross weight
2,250kg4,960lb
3,050kg6,724lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Calculated
To 99% top speed
61.4s99% target: 257 km/h / 160 mph
Calculated
95.9s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
4.6s
5.8s
0-200 km/h
16.4s
Calculated
25.1s
Calculated
0-60 mph
4.4s
Calculated
5.5s
Calculated
Fuel consumption
9.1L/100 km25.8mpg US31.0mpg UK
14.8L/100 km15.9mpg US19.1mpg UK
Fuel consumption city
12.4L/100 km19mpg US22.8mpg UK
22.8L/100 km10.3mpg US12.4mpg UK
Fuel consumption highway
7.2L/100 km32.7mpg US39.2mpg UK
10.2L/100 km23.1mpg US27.7mpg UK
Quarter mile
12.7s
Calculated
14.0s
Calculated
Power-to-weight
246hp/t184kW/t112hp/1000 lb
Calculated
175hp/t130kW/t79hp/1000 lb
Calculated
Torque-to-weight
314Nm/t210lb-ft/ton
Calculated
274Nm/t183lb-ft/ton
Calculated
Estimated range
659km410mi
Calculated
541km336mi
Calculated
Displacement
2,979cc182cu in
6,749cc412cu in
Length
4,671mm184in
5,612mm221in
Width
1,870mm74in
1,987mm78in
Height
1,386mm55in
1,566mm62in
Wheelbase
2,812mm111in
3,320mm131in
Front track
1,579mm62in
1,686mm66in
Rear track
1,603mm63in
1,676mm66in
Ground clearance
116mm5in
-
Trunk volume
220L
395L
Max trunk volume
370L
-
Doors
2
2
Seats
4
4
Fuel tank
60L
80L
CO2 emissions
213g/km
347g/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 M4 Convertible (F83) 3.0Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12PowerTorque
  • BMW M4 Convertible (F83) 3.0: Power / Torque
  • Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMWM4 Convertible (F83)3.05,500-7,300 rpm1,850-5,500 rpm7,550 rpm
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V125,350 rpm3,500 rpm5,600 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMWM4 Convertible (F83)3.0Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
5.5 s
0-100 km/h
0-62 mph
4.6 s
5.8 s
0-200 km/h
0-124 mph
16.4 s
25.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.2 s
330 ft
101 m
5.5 s
5.9 s
1/8 mile
201 m
8.3 s
9.0 s
1000 ft
305 m
10.7 s
11.8 s
1/4 mile
402 m
12.7 s
14.0 s
Trap speed
1/4 mile
402 m
180 km/h
112 mph
160 km/h
99 mph

Power comparison

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

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.0
431 hp
321 kW
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
460 hp
343 kW

Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12 has 29 hp more than BMW M4 Convertible (F83) 3.0.

The biggest power difference is between BMW M4 Convertible (F83) 3.0 and Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12: 29 hp (22 kW).

Torque comparison

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

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.0
550 Nm
406 lb-ft
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
720 Nm
531 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.0
1,750 kg
3,858 lb
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
2,630 kg
5,798 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.0
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.04.6 s
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V125.8 s

Although Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12 has more power, BMW M4 Convertible (F83) 3.0 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW M4 Convertible (F83) 3.0 and Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12: 1.2 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.0
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
14.8 L/100 km
15.9 mpg US
19.1 mpg UK

The biggest fuel consumption difference is between BMW M4 Convertible (F83) 3.0 and Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12: 5.7 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.0
246 hp/t
184 kW/t
4.1 kg/hp
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
175 hp/t
130 kW/t
5.7 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
BMWM4 Convertible (F83)3.0
659 km
410 mi
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
541 km
336 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMWM4 Convertible (F83)3.0
431 hp
321 kW
4.6 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
460 hp
343 kW
5.8 s
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 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
BMWM4 Convertible (F83)3.0
Power
431 hp
321 kW
0-100 km/h4.6 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
220 L
7.8 cu ft
Length
4,671 mm
183.9 in
Height
1,386 mm
54.6 in
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
Power
460 hp
343 kW
0-100 km/h5.8 s
Top speed
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Doors/seats
2 doors
4 seats
Trunk
395 L
13.9 cu ft
Length
5,612 mm
220.9 in
Height
1,566 mm
61.7 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
BMWM4 Convertible (F83)3.0
Power
431 hp
321 kW
0-100 km/h4.6 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
Power
460 hp
343 kW
0-100 km/h5.8 s
Top speed
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
14.8 L/100 km
15.9 mpg US
19.1 mpg UK

BMW M4 Convertible (F83) 3.0 is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
BMWM4 Convertible (F83)3.0
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
4.6 s
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
14.8 L/100 km
15.9 mpg US
19.1 mpg UK
5.8 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
BMWM4 Convertible (F83)3.0
246 hp/t
184 kW/t
4.1 kg/hp
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
175 hp/t
130 kW/t
5.7 kg/hp
14.8 L/100 km
15.9 mpg US
19.1 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMWM4 Convertible (F83)3.0Rolls-RoycePhantom Drophead CoupeFacelift 20126.7 V12
Power
431 hp
321 kW
460 hp
343 kW
Torque
550 Nm
406 lb-ft
720 Nm
531 lb-ft
Acceleration
4.6 s
5.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
250 km/h155 mph
Restricted
240 km/h149 mph
Lightness
1,750 kg
3,858 lb
2,630 kg
5,798 lb
Fuel consumption
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
14.8 L/100 km
15.9 mpg US
19.1 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
220 L
7.8 cu ft
Length
4,671 mm
183.9 in
Height
1,386 mm
54.6 in
Doors/seats
2 doors
4 seats
Trunk
395 L
13.9 cu ft
Length
5,612 mm
220.9 in
Height
1,566 mm
61.7 in
Range score
659 km
410 mi
541 km
336 mi
CO2 score
213 g/km
347 g/km
Trunk score
220 L
7.8 cu ft
395 L
13.9 cu ft
Power-to-weight score
246 hp/t
184 kW/t
4.1 kg/hp
175 hp/t
130 kW/t
5.7 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 M4 Convertible (F83) 3.0Rolls-Royce Phantom Drophead Coupe Facelift 2012 6.7 V12
Consumption9.1 L/100 km25.8 mpg US31 mpg UK14.8 L/100 km15.9 mpg US19.1 mpg UK
Cost / 100 km15.92 LC100 km25.90 LC100 km
Cost / 100 mi25.63 LC100 mi41.68 LC100 mi
Annual fuel used1,365 L361 US gal300 UK gal2,220 L586 US gal488 UK gal
Annual fuel cost2,389 LC/year3,885 LC/year

Head-to-head comparisons

BMW M4 Convertible (F83) 3.0

  • Is 880 kg lighter
  • Is 1.2 s quicker from 0-100 km/h
  • Has 10 km/h (6 mph) higher top speed
  • Uses 5.7 L/100 km less fuel
  • Has 71 hp/t better power-to-weight
  • Has 119 km (74 mi) more estimated range
  • Emits 134 g/km less CO2

Pros

  • Quickest 0-100 km/h in this comparison
  • Highest top speed
  • Lightest
  • Lowest combined fuel consumption
  • Best power-to-weight ratio
  • Best estimated range

Cons

  • Lowest power
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW M4 Convertible (F83) 3.0
Rolls-Royce Phantom Drophead Coupe 6.7 V12
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2 vehicles selected

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