Car comparison

BMW 2 Series Convertible (F23) M240ivsBMW X4 (G02) M40i

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

New comparison

BMW 2 Series Convertible (F23)

M240i

340 hp2998 ccGasolineAWDAutomaticTurbochargedCabriolet / convertible2016-2017
VS

BMW X4 (G02)

M40i

354 hp2998 ccGasolineAWDAutomaticTurbocharged2018-2019

Comparison overview

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

Best choices

BMW 2 Series Convertible (F23) M240i

  • Quickest 0-100 km/h
    4.6 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Highest torque
    500 Nm
    369 lb-ft
  • Lightest
    1,680 kg
    3,704 lb
  • Best power-to-weight
    202 hp/t
    151 kW/t
    4.9 kg/hp
  • Lowest combined fuel consumption
    7.8 L/100 km
    30.2 mpg US
    36.2 mpg UK
  • Lowest city consumption
    10.4 L/100 km
    22.6 mpg US
    27.2 mpg UK
  • Lowest highway consumption
    6.3 L/100 km
    37.3 mpg US
    44.8 mpg UK
  • Lowest CO2 emissions
    179 g/km
  • Best performance score
    71/100
  • Best economy score
    86/100

BMW X4 (G02) M40i

  • Most powerful
    354 hp
    264 kW
  • Best estimated range
    714 km
    444 mi
  • Largest trunk
    525 L
  • Best overall score
    73/100
  • Best practicality score
    76/100

Specification comparison

Specification comparison
ModelBMW2 Series Convertible (F23)M240iBMWX4 (G02)M40i
Power
340hp254kW
354hp264kW
Torque
500Nm369lb-ft
500Nm369lb-ft
Curb weight
1,680kg3,704lb
1,825kg4,023lb
Gross weight
2,110kg4,652lb
2,530kg5,578lb
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
67.2s99% target: 257 km/h / 160 mph
Calculated
69.6s99% target: 257 km/h / 160 mph
Calculated
0-100 km/h
4.6s
4.8s
0-200 km/h
17.2s
Calculated
17.9s
Calculated
0-60 mph
4.4s
Calculated
4.6s
Calculated
Fuel consumption
7.8L/100 km30.2mpg US36.2mpg UK
9.1L/100 km25.8mpg US31.0mpg UK
Fuel consumption city
10.4L/100 km22.6mpg US27.2mpg UK
11.5L/100 km20.5mpg US24.6mpg UK
Fuel consumption highway
6.3L/100 km37.3mpg US44.8mpg UK
7.7L/100 km30.5mpg US36.7mpg UK
Quarter mile
12.8s
Calculated
13.0s
Calculated
Power-to-weight
202hp/t151kW/t92hp/1000 lb
Calculated
194hp/t145kW/t88hp/1000 lb
Calculated
Torque-to-weight
298Nm/t199lb-ft/ton
Calculated
274Nm/t183lb-ft/ton
Calculated
Estimated range
667km414mi
Calculated
714km444mi
Calculated
Displacement
2,998cc183cu in
2,998cc183cu in
Length
4,454mm175in
4,733mm186in
Width
1,774mm70in
1,938mm76in
Height
1,403mm55in
1,621mm64in
Wheelbase
2,690mm106in
2,864mm113in
Front track
1,516mm60in
1,615mm64in
Rear track
1,534mm60in
1,624mm64in
Ground clearance
130mm5in
204mm8in
Trunk volume
280L
525L
Max trunk volume
335L
1,430L
Doors
2
5
Seats
4
5
Fuel tank
52L
65L
CO2 emissions
179g/km
206g/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 2 Series Convertible (F23) M240iBMW X4 (G02) M40iPowerTorque
  • BMW 2 Series Convertible (F23) M240i: Power / Torque
  • BMW X4 (G02) M40i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW2 Series Convertible (F23)M240i5,500 rpm1,520-4,500 rpm5,750 rpm
BMWX4 (G02)M40i5,500-6,500 rpm1,550-4,500 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW2 Series Convertible (F23)M240iBMWX4 (G02)M40i
Acceleration checkpoints
0-60 mph
0-97 km/h
4.4 s
4.6 s
0-100 km/h
0-62 mph
4.6 s
4.8 s
0-200 km/h
0-124 mph
17.2 s
17.9 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
2.0 s
2.1 s
330 ft
101 m
5.5 s
5.6 s
1/8 mile
201 m
8.3 s
8.4 s
1000 ft
305 m
10.7 s
10.9 s
1/4 mile
402 m
12.8 s
13.0 s
Trap speed
1/4 mile
402 m
177 km/h
110 mph
175 km/h
109 mph

Power comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)M240i
340 hp
254 kW
BMWX4 (G02)M40i
354 hp
264 kW

BMW X4 (G02) M40i has 14 hp more than BMW 2 Series Convertible (F23) M240i.

The biggest power difference is between BMW 2 Series Convertible (F23) M240i and BMW X4 (G02) M40i: 14 hp (10 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)M240i
500 Nm
369 lb-ft
BMWX4 (G02)M40i
500 Nm
369 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)M240i
1,680 kg
3,704 lb
BMWX4 (G02)M40i
1,825 kg
4,023 lb

Top speed without limiter comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)M240i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (G02)M40i
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
BMW2 Series Convertible (F23)M240i4.6 s
BMWX4 (G02)M40i4.8 s

Although BMW X4 (G02) M40i has more power, BMW 2 Series Convertible (F23) M240i is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between BMW 2 Series Convertible (F23) M240i and BMW X4 (G02) M40i: 0.2 s.

Fuel consumption comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)M240i
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
BMWX4 (G02)M40i
9.1 L/100 km
25.8 mpg US
31.0 mpg UK

The biggest fuel consumption difference is between BMW 2 Series Convertible (F23) M240i and BMW X4 (G02) M40i: 1.3 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
BMW2 Series Convertible (F23)M240i
202 hp/t
151 kW/t
4.9 kg/hp
BMWX4 (G02)M40i
194 hp/t
145 kW/t
5.2 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)M240i
667 km
414 mi
BMWX4 (G02)M40i
714 km
444 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW2 Series Convertible (F23)M240i
340 hp
254 kW
4.6 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (G02)M40i
354 hp
264 kW
4.8 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
BMW2 Series Convertible (F23)M240i
Power
340 hp
254 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
280 L
9.9 cu ft
Length
4,454 mm
175.4 in
Height
1,403 mm
55.2 in
BMWX4 (G02)M40i
Power
354 hp
264 kW
0-100 km/h4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Doors/seats
5 doors
5 seats
Trunk
525 L
18.5 cu ft
Length
4,733 mm
186.3 in
Height
1,621 mm
63.8 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
BMW2 Series Convertible (F23)M240i
Power
340 hp
254 kW
0-100 km/h4.6 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
BMWX4 (G02)M40i
Power
354 hp
264 kW
0-100 km/h4.8 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

BMW 2 Series Convertible (F23) M240i 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
BMW2 Series Convertible (F23)M240i
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
4.6 s
BMWX4 (G02)M40i
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
4.8 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
BMW2 Series Convertible (F23)M240i
202 hp/t
151 kW/t
4.9 kg/hp
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
BMWX4 (G02)M40i
194 hp/t
145 kW/t
5.2 kg/hp
9.1 L/100 km
25.8 mpg US
31.0 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW2 Series Convertible (F23)M240iBMWX4 (G02)M40i
Power
340 hp
254 kW
354 hp
264 kW
Torque
500 Nm
369 lb-ft
500 Nm
369 lb-ft
Acceleration
4.6 s
4.8 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Lightness
1,680 kg
3,704 lb
1,825 kg
4,023 lb
Fuel consumption
7.8 L/100 km
30.2 mpg US
36.2 mpg UK
9.1 L/100 km
25.8 mpg US
31.0 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
280 L
9.9 cu ft
Length
4,454 mm
175.4 in
Height
1,403 mm
55.2 in
Doors/seats
5 doors
5 seats
Trunk
525 L
18.5 cu ft
Length
4,733 mm
186.3 in
Height
1,621 mm
63.8 in
Range score
667 km
414 mi
714 km
444 mi
CO2 score
179 g/km
206 g/km
Trunk score
280 L
9.9 cu ft
525 L
18.5 cu ft
Power-to-weight score
202 hp/t
151 kW/t
4.9 kg/hp
194 hp/t
145 kW/t
5.2 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 2 Series Convertible (F23) M240iBMW X4 (G02) M40i
Consumption7.8 L/100 km30.2 mpg US36.2 mpg UK9.1 L/100 km25.8 mpg US31 mpg UK
Cost / 100 km13.65 LC100 km15.92 LC100 km
Cost / 100 mi21.97 LC100 mi25.63 LC100 mi
Annual fuel used1,170 L309 US gal257 UK gal1,365 L361 US gal300 UK gal
Annual fuel cost2,048 LC/year2,389 LC/year

Head-to-head comparisons

BMW 2 Series Convertible (F23) M240i

  • Is 145 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Uses 1.3 L/100 km less fuel
  • Has 8 hp/t better power-to-weight
  • Emits 27 g/km less CO2

Pros

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

Cons

  • Lowest power
  • Smallest trunk

BMW X4 (G02) M40i

  • Has 14 hp more
  • Has 48 km (30 mi) more estimated range
  • Has 245 L more trunk volume

Pros

  • Most powerful
  • 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 2 Series Convertible (F23) M240i
BMW X4 (G02) M40i
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BMW 2 Series Convertible (F23) M240i vs BMW X4 (G02) M40i - car comparison - FastVsFaster