Car comparison

BMW 6 Series Convertible (F12) 650ivsBMW X5 (F15) 50i

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

New comparison

BMW 6 Series Convertible (F12)

650i

450 hp4395 ccGasolineAWDAutomaticTurbochargedCabriolet / convertible2012-2015
VS

BMW X5 (F15)

50i

450 hp4395 ccGasolineAWDAutomaticTurbocharged2013-2018

Comparison overview

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

Best choices

BMW 6 Series Convertible (F12) 650i

  • Quickest 0-100 km/h
    4.5 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    450 hp
    336 kW
  • Highest torque
    650 Nm
    479 lb-ft
  • Lightest
    1,980 kg
    4,365 lb
  • Best power-to-weight
    227 hp/t
    169 kW/t
    4.4 kg/hp
  • Lowest combined fuel consumption
    9.5 L/100 km
    24.8 mpg US
    29.7 mpg UK
  • Lowest city consumption
    13.3 L/100 km
    17.7 mpg US
    21.2 mpg UK
  • Lowest highway consumption
    7.3 L/100 km
    32.2 mpg US
    38.7 mpg UK
  • Lowest CO2 emissions
    221 g/km
  • Best performance score
    79/100
  • Best economy score
    81/100

BMW X5 (F15) 50i

  • Best estimated range
    810 km
    503 mi
  • Largest trunk
    650 L
  • Best overall score
    78/100
  • Best practicality score
    82/100

Specification comparison

Specification comparison
ModelBMW6 Series Convertible (F12)650iBMWX5 (F15)50i
Power
450hp336kW
450hp336kW
Torque
650Nm479lb-ft
650Nm479lb-ft
Curb weight
1,980kg4,365lb
2,175kg4,795lb
Gross weight
2,480kg5,467lb
2,885kg6,360lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
To 99% top speed
61.6s99% target: 257 km/h / 160 mph
Calculated
81.7s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.5s
5.0s
0-200 km/h
16.3s
Calculated
19.7s
Calculated
0-60 mph
4.3s
Calculated
4.7s
Calculated
Fuel consumption
9.5L/100 km24.8mpg US29.7mpg UK
10.5L/100 km22.4mpg US26.9mpg UK
Fuel consumption city
13.3L/100 km17.7mpg US21.2mpg UK
14.1L/100 km16.7mpg US20.0mpg UK
Fuel consumption highway
7.3L/100 km32.2mpg US38.7mpg UK
8.3L/100 km28.3mpg US34.0mpg UK
Quarter mile
12.7s
Calculated
13.2s
Calculated
Power-to-weight
227hp/t169kW/t103hp/1000 lb
Calculated
207hp/t154kW/t94hp/1000 lb
Calculated
Torque-to-weight
328Nm/t220lb-ft/ton
Calculated
299Nm/t200lb-ft/ton
Calculated
Estimated range
737km458mi
Calculated
810km503mi
Calculated
Displacement
4,395cc268cu in
4,395cc268cu in
Length
4,894mm193in
4,886mm192in
Width
1,894mm75in
1,938mm76in
Height
1,365mm54in
1,762mm69in
Wheelbase
2,855mm112in
2,933mm115in
Front track
1,600mm63in
1,640mm65in
Rear track
1,665mm66in
1,646mm65in
Ground clearance
123mm5in
209mm8in
Trunk volume
300L
650L
Max trunk volume
350L
1,870L
Doors
2
5
Seats
4
5
Fuel tank
70L
85L
CO2 emissions
221g/km
244g/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 6 Series Convertible (F12) 650iBMW X5 (F15) 50iPowerTorque
  • BMW 6 Series Convertible (F12) 650i: Power / Torque
  • BMW X5 (F15) 50i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW6 Series Convertible (F12)650i5,500 rpm2,000-4,500 rpm5,750 rpm
BMWX5 (F15)50i5,500-6,000 rpm2,000-4,500 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW6 Series Convertible (F12)650iBMWX5 (F15)50i
Acceleration checkpoints
0-60 mph
0-97 km/h
4.3 s
4.7 s
0-100 km/h
0-62 mph
4.5 s
5.0 s
0-200 km/h
0-124 mph
16.3 s
19.7 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
Drag race simulation
60 ft
18 m
2.1 s
2.1 s
330 ft
101 m
5.5 s
5.6 s
1/8 mile
201 m
8.2 s
8.6 s
1000 ft
305 m
10.6 s
11.1 s
1/4 mile
402 m
12.7 s
13.2 s
Trap speed
1/4 mile
402 m
180 km/h
112 mph
170 km/h
106 mph

Power comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
450 hp
336 kW
BMWX5 (F15)50i
450 hp
336 kW

Torque comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
650 Nm
479 lb-ft
BMWX5 (F15)50i
650 Nm
479 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
1,980 kg
4,365 lb
BMWX5 (F15)50i
2,175 kg
4,795 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX5 (F15)50i
Unrestricted
260 km/h162 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
BMW6 Series Convertible (F12)650i4.5 s
BMWX5 (F15)50i5.0 s

The biggest 0-100 km/h difference is between BMW 6 Series Convertible (F12) 650i and BMW X5 (F15) 50i: 0.5 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
BMWX5 (F15)50i
10.5 L/100 km
22.4 mpg US
26.9 mpg UK

The biggest fuel consumption difference is between BMW 6 Series Convertible (F12) 650i and BMW X5 (F15) 50i: 1.0 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
BMW6 Series Convertible (F12)650i
227 hp/t
169 kW/t
4.4 kg/hp
BMWX5 (F15)50i
207 hp/t
154 kW/t
4.8 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW6 Series Convertible (F12)650i
737 km
458 mi
BMWX5 (F15)50i
810 km
503 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW6 Series Convertible (F12)650i
450 hp
336 kW
4.5 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX5 (F15)50i
450 hp
336 kW
5.0 s
Unrestricted
260 km/h162 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
BMW6 Series Convertible (F12)650i
Power
450 hp
336 kW
0-100 km/h4.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,894 mm
192.7 in
Height
1,365 mm
53.7 in
BMWX5 (F15)50i
Power
450 hp
336 kW
0-100 km/h5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
650 L
23.0 cu ft
Length
4,886 mm
192.4 in
Height
1,762 mm
69.4 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
BMW6 Series Convertible (F12)650i
Power
450 hp
336 kW
0-100 km/h4.5 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
BMWX5 (F15)50i
Power
450 hp
336 kW
0-100 km/h5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
10.5 L/100 km
22.4 mpg US
26.9 mpg UK

BMW 6 Series Convertible (F12) 650i 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
BMW6 Series Convertible (F12)650i
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
4.5 s
BMWX5 (F15)50i
10.5 L/100 km
22.4 mpg US
26.9 mpg UK
5.0 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
BMW6 Series Convertible (F12)650i
227 hp/t
169 kW/t
4.4 kg/hp
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
BMWX5 (F15)50i
207 hp/t
154 kW/t
4.8 kg/hp
10.5 L/100 km
22.4 mpg US
26.9 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW6 Series Convertible (F12)650iBMWX5 (F15)50i
Power
450 hp
336 kW
450 hp
336 kW
Torque
650 Nm
479 lb-ft
650 Nm
479 lb-ft
Acceleration
4.5 s
5.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,980 kg
4,365 lb
2,175 kg
4,795 lb
Fuel consumption
9.5 L/100 km
24.8 mpg US
29.7 mpg UK
10.5 L/100 km
22.4 mpg US
26.9 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,894 mm
192.7 in
Height
1,365 mm
53.7 in
Doors/seats
5 doors
5 seats
Trunk
650 L
23.0 cu ft
Length
4,886 mm
192.4 in
Height
1,762 mm
69.4 in
Range score
737 km
458 mi
810 km
503 mi
CO2 score
221 g/km
244 g/km
Trunk score
300 L
10.6 cu ft
650 L
23.0 cu ft
Power-to-weight score
227 hp/t
169 kW/t
4.4 kg/hp
207 hp/t
154 kW/t
4.8 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 6 Series Convertible (F12) 650iBMW X5 (F15) 50i
Consumption9.5 L/100 km24.8 mpg US29.7 mpg UK10.5 L/100 km22.4 mpg US26.9 mpg UK
Cost / 100 km16.63 LC100 km18.38 LC100 km
Cost / 100 mi26.76 LC100 mi29.57 LC100 mi
Annual fuel used1,425 L376 US gal313 UK gal1,575 L416 US gal346 UK gal
Annual fuel cost2,494 LC/year2,756 LC/year

Head-to-head comparisons

BMW 6 Series Convertible (F12) 650i

  • Is 195 kg lighter
  • Is 0.5 s quicker from 0-100 km/h
  • Uses 1.0 L/100 km less fuel
  • Has 20 hp/t better power-to-weight
  • Emits 23 g/km less CO2

Pros

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

Cons

  • Smallest trunk

BMW X5 (F15) 50i

  • Has 73 km (45 mi) more estimated range
  • Has 350 L more trunk volume

Pros

  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Highest combined fuel consumption
  • Heaviest
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 6 Series Convertible (F12) 650i
BMW X5 (F15) 50i
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