Car comparison

BMW 4 Series Convertible (F33) 440ivsBMW X4 (F26) M40i

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

New comparison

BMW 4 Series Convertible (F33)

440i

326 hp2998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2016-2016
VS

BMW X4 (F26)

M40i

360 hp2979 ccGasolineAWDAutomaticTurbocharged2015-2018

Comparison overview

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

Best choices

BMW X4 (F26) M40i

  • Quickest 0-100 km/h
    4.9 s
  • Most powerful
    360 hp
    268 kW
  • Highest torque
    465 Nm
    343 lb-ft
  • Lightest
    1,765 kg
    3,891 lb
  • Best power-to-weight
    204 hp/t
    152 kW/t
    4.9 kg/hp
  • Largest trunk
    500 L
  • Best overall score
    71/100
  • Best performance score
    69/100
  • Best practicality score
    75/100

BMW 4 Series Convertible (F33) 440i

  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Lowest combined fuel consumption
    7.2 L/100 km
    32.7 mpg US
    39.2 mpg UK
  • Lowest city consumption
    9.5 L/100 km
    24.8 mpg US
    29.7 mpg UK
  • Lowest highway consumption
    5.8 L/100 km
    40.6 mpg US
    48.7 mpg UK
  • Lowest CO2 emissions
    167 g/km
  • Best estimated range
    833 km
    518 mi
  • Best economy score
    87/100

Specification comparison

Specification comparison
ModelBMW4 Series Convertible (F33)440iBMWX4 (F26)M40i
Power
326hp243kW
360hp268kW
Torque
450Nm332lb-ft
465Nm343lb-ft
Curb weight
1,770kg3,902lb
1,765kg3,891lb
Gross weight
2,230kg4,916lb
2,430kg5,357lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
250 km/h
155 mph
To 99% top speed
74.8s99% target: 257 km/h / 160 mph
Calculated
72.2s99% target: 248 km/h / 154 mph
Calculated
0-100 km/h
5.4s
4.9s
0-200 km/h
19.7s
Calculated
20.0s
Calculated
0-60 mph
5.1s
Calculated
4.6s
Calculated
Fuel consumption
7.2L/100 km32.7mpg US39.2mpg UK
8.6L/100 km27.4mpg US32.8mpg UK
Fuel consumption city
9.5L/100 km24.8mpg US29.7mpg UK
11.3L/100 km20.8mpg US25.0mpg UK
Fuel consumption highway
5.8L/100 km40.6mpg US48.7mpg UK
7L/100 km33.6mpg US40.4mpg UK
Quarter mile
13.5s
Calculated
13.2s
Calculated
Power-to-weight
184hp/t137kW/t84hp/1000 lb
Calculated
204hp/t152kW/t93hp/1000 lb
Calculated
Torque-to-weight
254Nm/t170lb-ft/ton
Calculated
263Nm/t176lb-ft/ton
Calculated
Estimated range
833km518mi
Calculated
779km484mi
Calculated
Displacement
2,998cc183cu in
2,979cc182cu in
Length
4,638mm183in
4,671mm184in
Width
1,825mm72in
1,901mm75in
Height
1,384mm54in
1,624mm64in
Wheelbase
2,810mm111in
2,810mm111in
Front track
1,545mm61in
1,610mm63in
Rear track
1,594mm63in
1,600mm63in
Ground clearance
130mm5in
204mm8in
Trunk volume
370L
500L
Max trunk volume-
1,400L
Doors
2
5
Seats
4
5
Fuel tank
60L
67L
CO2 emissions
167g/km
199g/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 4 Series Convertible (F33) 440iBMW X4 (F26) M40iPowerTorque
  • BMW 4 Series Convertible (F33) 440i: Power / Torque
  • BMW X4 (F26) M40i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Convertible (F33)440i5,500 rpm1,380-5,000 rpm5,750 rpm
BMWX4 (F26)M40i5,800-6,000 rpm1,350-5,250 rpm6,250 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (F33)440iBMWX4 (F26)M40i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.1 s
4.6 s
0-100 km/h
0-62 mph
5.4 s
4.9 s
0-200 km/h
0-124 mph
19.7 s
20.0 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
250 km/h
155 mph
Drag race simulation
60 ft
18 m
2.2 s
2.1 s
330 ft
101 m
5.9 s
5.6 s
1/8 mile
201 m
8.8 s
8.5 s
1000 ft
305 m
11.4 s
11.0 s
1/4 mile
402 m
13.5 s
13.2 s
Trap speed
1/4 mile
402 m
170 km/h
106 mph
171 km/h
106 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)440i
326 hp
243 kW
BMWX4 (F26)M40i
360 hp
268 kW

BMW X4 (F26) M40i has 34 hp more than BMW 4 Series Convertible (F33) 440i.

The biggest power difference is between BMW 4 Series Convertible (F33) 440i and BMW X4 (F26) M40i: 34 hp (25 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)440i
450 Nm
332 lb-ft
BMWX4 (F26)M40i
465 Nm
343 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)440i
1,770 kg
3,902 lb
BMWX4 (F26)M40i
1,765 kg
3,891 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)440i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (F26)M40i
250 km/h
155 mph

0-100 km/h comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)440i5.4 s
BMWX4 (F26)M40i4.9 s

The biggest 0-100 km/h difference is between BMW X4 (F26) M40i and BMW 4 Series Convertible (F33) 440i: 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
BMW4 Series Convertible (F33)440i
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
BMWX4 (F26)M40i
8.6 L/100 km
27.4 mpg US
32.8 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (F33) 440i and BMW X4 (F26) M40i: 1.4 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
BMW4 Series Convertible (F33)440i
184 hp/t
137 kW/t
5.4 kg/hp
BMWX4 (F26)M40i
204 hp/t
152 kW/t
4.9 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (F33)440i
833 km
518 mi
BMWX4 (F26)M40i
779 km
484 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Convertible (F33)440i
326 hp
243 kW
5.4 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (F26)M40i
360 hp
268 kW
4.9 s
250 km/h
155 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
BMW4 Series Convertible (F33)440i
Power
326 hp
243 kW
0-100 km/h5.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
2 doors
4 seats
Trunk
370 L
13.1 cu ft
Length
4,638 mm
182.6 in
Height
1,384 mm
54.5 in
BMWX4 (F26)M40i
Power
360 hp
268 kW
0-100 km/h4.9 s
Top speed
250 km/h
155 mph
Doors/seats
5 doors
5 seats
Trunk
500 L
17.7 cu ft
Length
4,671 mm
183.9 in
Height
1,624 mm
63.9 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
BMW4 Series Convertible (F33)440i
Power
326 hp
243 kW
0-100 km/h5.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
BMWX4 (F26)M40i
Power
360 hp
268 kW
0-100 km/h4.9 s
Top speed
250 km/h
155 mph
8.6 L/100 km
27.4 mpg US
32.8 mpg UK

BMW X4 (F26) M40i 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
BMW4 Series Convertible (F33)440i
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
5.4 s
BMWX4 (F26)M40i
8.6 L/100 km
27.4 mpg US
32.8 mpg UK
4.9 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
BMW4 Series Convertible (F33)440i
184 hp/t
137 kW/t
5.4 kg/hp
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
BMWX4 (F26)M40i
204 hp/t
152 kW/t
4.9 kg/hp
8.6 L/100 km
27.4 mpg US
32.8 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (F33)440iBMWX4 (F26)M40i
Power
326 hp
243 kW
360 hp
268 kW
Torque
450 Nm
332 lb-ft
465 Nm
343 lb-ft
Acceleration
5.4 s
4.9 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
250 km/h
155 mph
Lightness
1,770 kg
3,902 lb
1,765 kg
3,891 lb
Fuel consumption
7.2 L/100 km
32.7 mpg US
39.2 mpg UK
8.6 L/100 km
27.4 mpg US
32.8 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
370 L
13.1 cu ft
Length
4,638 mm
182.6 in
Height
1,384 mm
54.5 in
Doors/seats
5 doors
5 seats
Trunk
500 L
17.7 cu ft
Length
4,671 mm
183.9 in
Height
1,624 mm
63.9 in
Range score
833 km
518 mi
779 km
484 mi
CO2 score
167 g/km
199 g/km
Trunk score
370 L
13.1 cu ft
500 L
17.7 cu ft
Power-to-weight score
184 hp/t
137 kW/t
5.4 kg/hp
204 hp/t
152 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 4 Series Convertible (F33) 440iBMW X4 (F26) M40i
Consumption7.2 L/100 km32.7 mpg US39.2 mpg UK8.6 L/100 km27.4 mpg US32.8 mpg UK
Cost / 100 km12.60 LC100 km15.05 LC100 km
Cost / 100 mi20.28 LC100 mi24.22 LC100 mi
Annual fuel used1,080 L285 US gal238 UK gal1,290 L341 US gal284 UK gal
Annual fuel cost1,890 LC/year2,258 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (F33) 440i

  • Has 10 km/h (6 mph) higher top speed
  • Uses 1.4 L/100 km less fuel
  • Has 54 km (34 mi) more estimated range
  • Emits 32 g/km less CO2

Pros

  • Highest top speed
  • Lowest combined fuel consumption
  • Best estimated range

Cons

  • Slowest 0-100 km/h
  • Lowest power
  • Heaviest
  • Smallest trunk

BMW X4 (F26) M40i

  • Has 34 hp more
  • Has 15 Nm more
  • Is 5 kg lighter
  • Is 0.5 s quicker from 0-100 km/h
  • Has 20 hp/t better power-to-weight
  • Has 130 L more trunk volume

Pros

  • Quickest 0-100 km/h in this comparison
  • Most powerful
  • Highest torque
  • Lightest
  • Best power-to-weight ratio
  • Largest trunk

Cons

  • Highest combined fuel consumption
  • Lowest top speed
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Convertible (F33) 440i
BMW X4 (F26) M40i
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