Car comparison

BMW 2 Series Convertible (F23) 228ivsBMW X4 (F26) 28i

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

New comparison

BMW 2 Series Convertible (F23)

228i

245 hp1997 ccGasolineRWDManualTurbochargedCabriolet / convertible2015-2016
VS

BMW X4 (F26)

28i

245 hp1997 ccGasolineAWDAutomaticTurbocharged2014-2018

Comparison overview

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

Best choices

BMW 2 Series Convertible (F23) 228i

  • Quickest 0-100 km/h
    6.1 s
  • Fastest top speed
    260 km/h
    162 mph Unrestricted
    250 km/h
    155 mph Restricted
  • Most powerful
    245 hp
    183 kW
  • Highest torque
    350 Nm
    258 lb-ft
  • Lightest
    1,535 kg
    3,384 lb
  • Best power-to-weight
    160 hp/t
    119 kW/t
    6.3 kg/hp
  • Lowest combined fuel consumption
    7.0 L/100 km
    33.6 mpg US
    40.4 mpg UK
  • Lowest highway consumption
    5.6 L/100 km
    42.0 mpg US
    50.4 mpg UK
  • Lowest CO2 emissions
    163 g/km
  • Best performance score
    60/100
  • Best economy score
    88/100

BMW X4 (F26) 28i

  • Lowest city consumption
    9.1 L/100 km
    25.8 mpg US
    31.0 mpg UK
  • Best estimated range
    918 km
    570 mi
  • Largest trunk
    500 L
  • Best overall score
    61/100
  • Best practicality score
    75/100

Specification comparison

Specification comparison
ModelBMW2 Series Convertible (F23)228iBMWX4 (F26)28i
Power
245hp183kW
245hp183kW
Torque
350Nm258lb-ft
350Nm258lb-ft
Curb weight
1,535kg3,384lb
1,770kg3,902lb
Gross weight
1,975kg4,354lb
2,360kg5,203lb
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Calculated
232 km/h
144 mph
To 99% top speed
90.4s99% target: 257 km/h / 160 mph
Calculated
90.3s99% target: 230 km/h / 143 mph
Calculated
0-100 km/h
6.1s
6.4s
0-200 km/h
22.9s
Calculated
31.2s
Calculated
0-60 mph
5.8s
Calculated
6.0s
Calculated
Fuel consumption
7L/100 km33.6mpg US40.4mpg UK
7.3L/100 km32.2mpg US38.7mpg UK
Fuel consumption city
9.3L/100 km25.3mpg US30.4mpg UK
9.1L/100 km25.8mpg US31.0mpg UK
Fuel consumption highway
5.6L/100 km42mpg US50.4mpg UK
6.2L/100 km37.9mpg US45.6mpg UK
Quarter mile
14.2s
Calculated
14.6s
Calculated
Power-to-weight
160hp/t119kW/t72hp/1000 lb
Calculated
138hp/t103kW/t63hp/1000 lb
Calculated
Torque-to-weight
228Nm/t153lb-ft/ton
Calculated
198Nm/t132lb-ft/ton
Calculated
Estimated range
743km462mi
Calculated
918km570mi
Calculated
Displacement
1,997cc122cu in
1,997cc122cu in
Length
4,432mm174in
4,671mm184in
Width
1,774mm70in
1,881mm74in
Height
1,413mm56in
1,624mm64in
Wheelbase
2,690mm106in
2,810mm111in
Front track
1,521mm60in
1,616mm64in
Rear track
1,556mm61in
1,632mm64in
Ground clearance
140mm6in
204mm8in
Trunk volume
280L
500L
Max trunk volume-
1,400L
Doors
2
5
Seats
4
5
Fuel tank
52L
67L
CO2 emissions
163g/km
169g/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) 228iBMW X4 (F26) 28iPowerTorque
  • BMW 2 Series Convertible (F23) 228i: Power / Torque
  • BMW X4 (F26) 28i: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW2 Series Convertible (F23)228i5,000-6,500 rpm1,250-4,800 rpm6,750 rpm
BMWX4 (F26)28i5,000-6,500 rpm1,250-4,800 rpm6,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW2 Series Convertible (F23)228iBMWX4 (F26)28i
Acceleration checkpoints
0-60 mph
0-97 km/h
5.8 s
6.0 s
0-100 km/h
0-62 mph
6.1 s
6.4 s
0-200 km/h
0-124 mph
22.9 s
31.2 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
Likely limited
232 km/h
144 mph
Drag race simulation
60 ft
18 m
2.3 s
2.2 s
330 ft
101 m
6.2 s
6.1 s
1/8 mile
201 m
9.3 s
9.4 s
1000 ft
305 m
12.0 s
12.2 s
1/4 mile
402 m
14.2 s
14.6 s
Trap speed
1/4 mile
402 m
163 km/h
101 mph
153 km/h
95 mph

Power comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)228i
245 hp
183 kW
BMWX4 (F26)28i
245 hp
183 kW

Torque comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)228i
350 Nm
258 lb-ft
BMWX4 (F26)28i
350 Nm
258 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)228i
1,535 kg
3,384 lb
BMWX4 (F26)28i
1,770 kg
3,902 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)228i
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (F26)28i
232 km/h
144 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)228i6.1 s
BMWX4 (F26)28i6.4 s

The biggest 0-100 km/h difference is between BMW 2 Series Convertible (F23) 228i and BMW X4 (F26) 28i: 0.3 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)228i
7.0 L/100 km
33.6 mpg US
40.4 mpg UK
BMWX4 (F26)28i
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

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)228i
160 hp/t
119 kW/t
6.3 kg/hp
BMWX4 (F26)28i
138 hp/t
103 kW/t
7.2 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW2 Series Convertible (F23)228i
743 km
462 mi
BMWX4 (F26)28i
918 km
570 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW2 Series Convertible (F23)228i
245 hp
183 kW
6.1 s
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
BMWX4 (F26)28i
245 hp
183 kW
6.4 s
232 km/h
144 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)228i
Power
245 hp
183 kW
0-100 km/h6.1 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
4,432 mm
174.5 in
Height
1,413 mm
55.6 in
BMWX4 (F26)28i
Power
245 hp
183 kW
0-100 km/h6.4 s
Top speed
232 km/h
144 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
BMW2 Series Convertible (F23)228i
Power
245 hp
183 kW
0-100 km/h6.1 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
7.0 L/100 km
33.6 mpg US
40.4 mpg UK
BMWX4 (F26)28i
Power
245 hp
183 kW
0-100 km/h6.4 s
Top speed
232 km/h
144 mph
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

BMW 2 Series Convertible (F23) 228i 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)228i
7.0 L/100 km
33.6 mpg US
40.4 mpg UK
6.1 s
BMWX4 (F26)28i
7.3 L/100 km
32.2 mpg US
38.7 mpg UK
6.4 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)228i
160 hp/t
119 kW/t
6.3 kg/hp
7.0 L/100 km
33.6 mpg US
40.4 mpg UK
BMWX4 (F26)28i
138 hp/t
103 kW/t
7.2 kg/hp
7.3 L/100 km
32.2 mpg US
38.7 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW2 Series Convertible (F23)228iBMWX4 (F26)28i
Power
245 hp
183 kW
245 hp
183 kW
Torque
350 Nm
258 lb-ft
350 Nm
258 lb-ft
Acceleration
6.1 s
6.4 s
Top speed
Unrestricted
260 km/h162 mph
Restricted
250 km/h155 mph
232 km/h
144 mph
Lightness
1,535 kg
3,384 lb
1,770 kg
3,902 lb
Fuel consumption
7.0 L/100 km
33.6 mpg US
40.4 mpg UK
7.3 L/100 km
32.2 mpg US
38.7 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
280 L
9.9 cu ft
Length
4,432 mm
174.5 in
Height
1,413 mm
55.6 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
743 km
462 mi
918 km
570 mi
CO2 score
163 g/km
169 g/km
Trunk score
280 L
9.9 cu ft
500 L
17.7 cu ft
Power-to-weight score
160 hp/t
119 kW/t
6.3 kg/hp
138 hp/t
103 kW/t
7.2 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) 228iBMW X4 (F26) 28i
Consumption7 L/100 km33.6 mpg US40.4 mpg UK7.3 L/100 km32.2 mpg US38.7 mpg UK
Cost / 100 km12.25 LC100 km12.78 LC100 km
Cost / 100 mi19.71 LC100 mi20.56 LC100 mi
Annual fuel used1,050 L277 US gal231 UK gal1,095 L289 US gal241 UK gal
Annual fuel cost1,838 LC/year1,916 LC/year

Head-to-head comparisons

BMW 2 Series Convertible (F23) 228i

  • Is 235 kg lighter
  • Is 0.3 s quicker from 0-100 km/h
  • Has 28 km/h (17 mph) higher top speed
  • Uses 0.3 L/100 km less fuel
  • Has 21 hp/t better power-to-weight
  • Emits 6 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 X4 (F26) 28i

  • Has 175 km (109 mi) more estimated range
  • Has 220 L more trunk volume

Pros

  • Best estimated range
  • Largest trunk

Cons

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

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 2 Series Convertible (F23) 228i
BMW X4 (F26) 28i
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