Car comparison

BMW 4 Series Convertible (G23) 420ivsMini Convertible (F57) · Facelift 2021 Cooper S 2.0

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

New comparison

BMW 4 Series Convertible (G23)

420i

184 hp1998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2020-2024
VS

Mini Convertible (F57) · Facelift 2021

Cooper S 2.0

178 hp1998 ccGasolineFWDManualTurbochargedCabriolet / convertible2021-2022

Comparison overview

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

Best choices

BMW 4 Series Convertible (G23) 420i

  • Fastest top speed
    236 km/h
    147 mph
  • Most powerful
    184 hp
    137 kW
  • Highest torque
    300 Nm
    221 lb-ft
  • Lowest combined fuel consumption
    6.1 L/100 km
    38.6 mpg US
    46.3 mpg UK
  • Lowest city consumption
    7.4 L/100 km
    31.8 mpg US
    38.2 mpg UK
  • Lowest highway consumption
    5.4 L/100 km
    43.6 mpg US
    52.3 mpg UK
  • Best estimated range
    967 km
    601 mi
  • Largest trunk
    300 L
  • Best overall score
    47/100
  • Best economy score
    90/100
  • Best practicality score
    45/100

Specification comparison

Specification comparison
ModelBMW4 Series Convertible (G23)420iMiniConvertible (F57)Facelift 2021Cooper S 2.0
Power
184hp137kW
178hp133kW
Torque
300Nm221lb-ft
280Nm207lb-ft
Curb weight
1,690kg3,726lb
1,305kg2,877lb
Gross weight
2,185kg4,817lb
1,745kg3,847lb
Top speed
236 km/h
147 mph
230 km/h
143 mph
To 99% top speed
107.5s99% target: 234 km/h / 145 mph
Calculated
90.3s99% target: 228 km/h / 141 mph
Calculated
0-100 km/h
8.2s
7.1s
0-200 km/h
36.3s
Calculated
33.4s
Calculated
0-60 mph
7.8s
Calculated
6.7s
Calculated
Fuel consumption
6.1L/100 km38.6mpg US46.3mpg UK
6.7L/100 km35.1mpg US42.2mpg UK
Fuel consumption city
7.4L/100 km31.8mpg US38.2mpg UK
8.7L/100 km27mpg US32.5mpg UK
Fuel consumption highway
5.4L/100 km43.6mpg US52.3mpg UK
5.5L/100 km42.8mpg US51.4mpg UK
Quarter mile
15.9s
Calculated
15.1s
Calculated
Power-to-weight
109hp/t81kW/t49hp/1000 lb
Calculated
136hp/t102kW/t62hp/1000 lb
Calculated
Torque-to-weight
178Nm/t119lb-ft/ton
Calculated
215Nm/t144lb-ft/ton
Calculated
Estimated range
967km601mi
Calculated
657km408mi
Calculated
Displacement
1,998cc122cu in
1,998cc122cu in
Length
4,768mm188in
3,876mm153in
Width
1,852mm73in
1,727mm68in
Height
1,384mm54in
1,415mm56in
Wheelbase
2,851mm112in
2,495mm98in
Front track
1,575mm62in
1,485mm58in
Rear track
1,611mm63in
1,485mm58in
Ground clearance
124mm5in
115mm5in
Trunk volume
300L
160L
Max trunk volume
385L
215L
Doors
2
2
Seats
4
4
Fuel tank
59L
44L

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 (G23) 420iMini Convertible (F57) Facelift 2021 Cooper S 2.0PowerTorque
  • BMW 4 Series Convertible (G23) 420i: Power / Torque
  • Mini Convertible (F57) Facelift 2021 Cooper S 2.0: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
BMW4 Series Convertible (G23)420i5,000-6,500 rpm1,350-4,000 rpm6,750 rpm
MiniConvertible (F57)Facelift 2021Cooper S 2.05,000-5,500 rpm1,350-4,200 rpm5,750 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricBMW4 Series Convertible (G23)420iMiniConvertible (F57)Facelift 2021Cooper S 2.0
Acceleration checkpoints
0-60 mph
0-97 km/h
7.8 s
6.7 s
0-100 km/h
0-62 mph
8.2 s
7.1 s
0-200 km/h
0-124 mph
36.3 s
33.4 s
Top speed
236 km/h
147 mph
230 km/h
143 mph
Drag race simulation
60 ft
18 m
2.6 s
2.4 s
330 ft
101 m
6.9 s
6.5 s
1/8 mile
201 m
10.4 s
9.8 s
1000 ft
305 m
13.4 s
12.7 s
1/4 mile
402 m
15.9 s
15.1 s
Trap speed
1/4 mile
402 m
145 km/h
90 mph
150 km/h
93 mph

Power comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)420i
184 hp
137 kW
MiniConvertible (F57)Facelift 2021Cooper S 2.0
178 hp
133 kW

BMW 4 Series Convertible (G23) 420i has 6 hp more than Mini Convertible (F57) Facelift 2021 Cooper S 2.0.

The biggest power difference is between Mini Convertible (F57) Facelift 2021 Cooper S 2.0 and BMW 4 Series Convertible (G23) 420i: 6 hp (4 kW).

Torque comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)420i
300 Nm
221 lb-ft
MiniConvertible (F57)Facelift 2021Cooper S 2.0
280 Nm
207 lb-ft

Curb weight comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)420i
1,690 kg
3,726 lb
MiniConvertible (F57)Facelift 2021Cooper S 2.0
1,305 kg
2,877 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 (G23)420i
236 km/h
147 mph
MiniConvertible (F57)Facelift 2021Cooper S 2.0
230 km/h
143 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 (G23)420i8.2 s
MiniConvertible (F57)Facelift 2021Cooper S 2.07.1 s

Although BMW 4 Series Convertible (G23) 420i has more power, Mini Convertible (F57) Facelift 2021 Cooper S 2.0 is quicker from 0-100 km/h.

The biggest 0-100 km/h difference is between Mini Convertible (F57) Facelift 2021 Cooper S 2.0 and BMW 4 Series Convertible (G23) 420i: 1.1 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 (G23)420i
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
MiniConvertible (F57)Facelift 2021Cooper S 2.0
6.7 L/100 km
35.1 mpg US
42.2 mpg UK

The biggest fuel consumption difference is between BMW 4 Series Convertible (G23) 420i and Mini Convertible (F57) Facelift 2021 Cooper S 2.0: 0.6 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 (G23)420i
109 hp/t
81 kW/t
9.2 kg/hp
MiniConvertible (F57)Facelift 2021Cooper S 2.0
136 hp/t
102 kW/t
7.3 kg/hp

Estimated range comparison

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

Chart data table
VehicleValue
BMW4 Series Convertible (G23)420i
967 km
601 mi
MiniConvertible (F57)Facelift 2021Cooper S 2.0
657 km
408 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
BMW4 Series Convertible (G23)420i
184 hp
137 kW
8.2 s
236 km/h
147 mph
MiniConvertible (F57)Facelift 2021Cooper S 2.0
178 hp
133 kW
7.1 s
230 km/h
143 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 (G23)420i
Power
184 hp
137 kW
0-100 km/h8.2 s
Top speed
236 km/h
147 mph
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,768 mm
187.7 in
Height
1,384 mm
54.5 in
MiniConvertible (F57)Facelift 2021Cooper S 2.0
Power
178 hp
133 kW
0-100 km/h7.1 s
Top speed
230 km/h
143 mph
Doors/seats
2 doors
4 seats
Trunk
160 L
5.7 cu ft
Length
3,876 mm
152.6 in
Height
1,415 mm
55.7 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
BMW4 Series Convertible (G23)420i
Power
184 hp
137 kW
0-100 km/h8.2 s
Top speed
236 km/h
147 mph
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
MiniConvertible (F57)Facelift 2021Cooper S 2.0
Power
178 hp
133 kW
0-100 km/h7.1 s
Top speed
230 km/h
143 mph
6.7 L/100 km
35.1 mpg US
42.2 mpg UK

Mini Convertible (F57) Facelift 2021 Cooper S 2.0 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
BMW4 Series Convertible (G23)420i
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
8.2 s
MiniConvertible (F57)Facelift 2021Cooper S 2.0
6.7 L/100 km
35.1 mpg US
42.2 mpg UK
7.1 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 (G23)420i
109 hp/t
81 kW/t
9.2 kg/hp
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
MiniConvertible (F57)Facelift 2021Cooper S 2.0
136 hp/t
102 kW/t
7.3 kg/hp
6.7 L/100 km
35.1 mpg US
42.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehicleBMW4 Series Convertible (G23)420iMiniConvertible (F57)Facelift 2021Cooper S 2.0
Power
184 hp
137 kW
178 hp
133 kW
Torque
300 Nm
221 lb-ft
280 Nm
207 lb-ft
Acceleration
8.2 s
7.1 s
Top speed
236 km/h
147 mph
230 km/h
143 mph
Lightness
1,690 kg
3,726 lb
1,305 kg
2,877 lb
Fuel consumption
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
6.7 L/100 km
35.1 mpg US
42.2 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
300 L
10.6 cu ft
Length
4,768 mm
187.7 in
Height
1,384 mm
54.5 in
Doors/seats
2 doors
4 seats
Trunk
160 L
5.7 cu ft
Length
3,876 mm
152.6 in
Height
1,415 mm
55.7 in
Range score
967 km
601 mi
657 km
408 mi
Trunk score
300 L
10.6 cu ft
160 L
5.7 cu ft
Power-to-weight score
109 hp/t
81 kW/t
9.2 kg/hp
136 hp/t
102 kW/t
7.3 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 (G23) 420iMini Convertible (F57) Facelift 2021 Cooper S 2.0
Consumption6.1 L/100 km38.6 mpg US46.3 mpg UK6.7 L/100 km35.1 mpg US42.2 mpg UK
Cost / 100 km10.67 LC100 km11.73 LC100 km
Cost / 100 mi17.18 LC100 mi18.87 LC100 mi
Annual fuel used915 L242 US gal201 UK gal1,005 L265 US gal221 UK gal
Annual fuel cost1,601 LC/year1,759 LC/year

Head-to-head comparisons

BMW 4 Series Convertible (G23) 420i

  • Has 6 hp more
  • Has 20 Nm more
  • Has 6 km/h (4 mph) higher top speed
  • Uses 0.6 L/100 km less fuel
  • Has 310 km (193 mi) more estimated range
  • Has 140 L more trunk volume

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest

Mini Convertible (F57) Facelift 2021 Cooper S 2.0

  • Is 385 kg lighter
  • Is 1.1 s quicker from 0-100 km/h
  • Has 28 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Lightest
  • Best power-to-weight ratio

Cons

  • Lowest power
  • Highest combined fuel consumption
  • Lowest top speed
  • Smallest trunk

Choose cars to compare

Brand
Model
Generation
Engine or modification
BMW 4 Series Convertible (G23) 420i
Mini Convertible (F57) Cooper S 2.0
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2 vehicles selected

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