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BMW 4 Series Convertible (G23)

420i

184 hp1998 ccGasolineRWDAutomaticTurbochargedCabriolet / convertible2020-2024
0-100 km/h 8.2 s
Top speed
236 km/h
147 mph

Performance

Performance
Power184 hp258 hp374 hp
Torque
300Nm221lb-ft
Displacement
1,998cc122cu in
Curb weight
1,690kg3,726lb
Gross weight
2,185kg4,817lb
Power-to-weight
109hp/t81kW/t49hp/1000 lb
Calculated
Torque-to-weight
178Nm/t119lb-ft/ton
Calculated
0-100 km/h
8.2s
0-200 km/h
36.3s
Calculated
0-60 mph
7.8s
Calculated
Quarter mile
15.9s
Calculated
Top speed
236 km/h
147 mph
To 99% top speed
107.5s99% target: 234 km/h / 145 mph
Calculated

Efficiency and range

Efficiency and range
Fuel consumption
6.1L/100 km38.6mpg US46.3mpg UK
Fuel consumption city
7.4L/100 km31.8mpg US38.2mpg UK
Fuel consumption highway
5.4L/100 km43.6mpg US52.3mpg UK
Fuel tank
59L
Estimated range
967km601mi
Calculated

Engine and drivetrain

Engine and drivetrain
FuelDieselGasoline
EngineB48B20A
Body typeCabriolet / convertible
AspirationTurbocharged
Drive typeRWD
TransmissionAutomatic
Gears8-speed
Engine layoutFront, Longitudinal
Engine configurationInline
Cylinders4
Valves per cylinder4

Dimensions and space

Dimensions and space
Length
4,768mm188in
Width
1,852mm73in
Height
1,384mm54in
Wheelbase
2,851mm112in
Front track
1,575mm62in
Rear track
1,611mm63in
Ground clearance
124mm5in
Trunk volume
300L
Max trunk volume
385L
Doors
2
Seats
4

Performance spider chart

Current vehicle compared with the precomputed median score across the database.

Power benchmark

Current vehicle compared with the database median for Power. Higher is better · hp / kW

Power benchmark
VehicleValue
BMW4 Series Convertible (G23)420i
184 hp
137 kW
Database median
261 hp
195 kW

0-100 km/h benchmark

Current vehicle compared with the database median for 0-100 km/h. Lower is better · s

0-100 km/h benchmark
VehicleValue
BMW4 Series Convertible (G23)420i8.2 s
Database median6.4 s

Top speed benchmark

Current vehicle compared with the database median for Top speed. Higher is better · km/h / mph

Top speed benchmark
VehicleValue
BMW4 Series Convertible (G23)420i
236 km/h
147 mph
Database median
242 km/h
150 mph

Fuel consumption benchmark

Current vehicle compared with the database median for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Fuel consumption benchmark
VehicleValue
BMW4 Series Convertible (G23)420i
6.1 L/100 km
38.6 mpg US
46.3 mpg UK
Database median
7.4 L/100 km
31.8 mpg US
38.2 mpg UK

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) 420i
Consumption6.1 L/100 km38.6 mpg US46.3 mpg UK
Cost / 100 km10.67 LC100 km
Cost / 100 mi17.18 LC100 mi
Annual fuel used915 L242 US gal201 UK gal
Annual fuel cost1,601 LC/year

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

BMW 4 Series Convertible (G23) 420iPowerTorque
  • BMW 4 Series Convertible (G23) 420i: 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

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