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BMWBMW 4 Series Convertible (G23) 420i (184 Hp) Steptronic2020, 2021, 2022, 2023, 2024: specs, Fuel consumption, Dimensions

2021 BMW 4 Series Convertible (G23) - Photo 1
BMW 4 Series Convertible (G23) - Photo 2BMW 4 Series Convertible (G23) - Photo 3BMW 4 Series Convertible (G23) - Photo 4BMW 4 Series Convertible (G23) - Photo 5BMW 4 Series Convertible (G23) - Photo 6BMW 4 Series Convertible (G23) - Photo 7BMW 4 Series Convertible (G23) - Photo 8BMW 4 Series Convertible (G23) - Photo 9BMW 4 Series Convertible (G23) - Photo 10

Key specs

BMW 4 Series Convertible (G23) 420i (184 Hp) Steptronic /Cabriolet 2020 - 2024/
What is the body type of BMW 4 Series Convertible (G23)?
Cabriolet, 2 Doors, 4 Seats
What is the fuel consumption and economy of BMW 4 Series Convertible (G23) 420i (184 Hp) Steptronic?
6.7-7.4 l/100 km
35.1 - 31.8 US mpg
42.2 - 38.2 UK mpg
14.9 - 13.5 km/l
How environmentally friendly is BMW 4 Series 420i (184 Hp) Steptronic?
152-169 g/km CO2
Euro 6d
How fast is 2020 4 Series Convertible (G23) 420i (184 Hp) Steptronic?
236 km/h | 147 mph
0-100 km/h: 8.2 sec
0-60 mph: 7.8 sec
What is the power output of BMW 4 Series Cabriolet 2020 420i (184 Hp) Steptronic?
184 Hp, 300 Nm
221 lb.-ft.
What is the engine displacement of BMW 4 Series Cabriolet 2020 420i (184 Hp) Steptronic?
2.0 l
1998 cm3
121.93 cu. in.
What is the number of cylinders in 2020 BMW 420i (184 Hp) Steptronic?
4, Inline
What is the drivetrain of BMW 4 Series Convertible (G23) Cabriolet 2020 420i (184 Hp) Steptronic?
Rear wheel drive. ICE. The Internal combustion engine (ICE) drives the rear wheels of the vehicle.
What is the length of 2020 BMW 4 Series Cabriolet?
4768 mm
187.72 in.
What is the width of 2020 BMW 4 Series Cabriolet?
1852 mm
72.91 in.
What is the kerb weight of 2020 BMW 4 Series Convertible (G23) 420i (184 Hp) Steptronic?
1690 kg
3726 lbs.
What is the maximum permissible mass of 2020 BMW 4 Series Convertible (G23) 420i (184 Hp) Steptronic?
2185 kg
4817 lbs.
What is the trunk (boot) capacity of 2020 BMW 4 Series Cabriolet?
300 - 385 l
10.6 - 13.6 cu. ft.
What are the number of gears and the gearbox type of 2020 BMW 4 Series Convertible (G23) 420i (184 Hp) Steptronic?
8, automatic transmission Steptronic
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BMW 4 Series Convertible (G23) 420i (184 Hp) Steptronic
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General information

Brand
BMW
Model
4 Series
Generation
4 Series Convertible (G23)
Modification (Engine)
420i (184 Hp) Steptronic
Start of production
2020
End of production
January, 2024
Powertrain Architecture
Internal Combustion engine
Body type
Cabriolet
Seats
4
Doors
2
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Performance specs

Combined fuel consumption (WLTP)
6.7-7.4 l/100 km 35.1 - 31.8 US mpg
42.2 - 38.2 UK mpg
14.9 - 13.5 km/l
CO2 emissions (WLTP)
152-169 g/km
Fuel consumption (economy) - urban (NEDC)
7.1-7.4 l/100 km 33.1 - 31.8 US mpg
39.8 - 38.2 UK mpg
14.1 - 13.5 km/l
Fuel consumption (economy) - extra urban (NEDC)
4.9-5.4 l/100 km 48 - 43.6 US mpg
57.6 - 52.3 UK mpg
20.4 - 18.5 km/l
Fuel consumption (economy) - combined (NEDC)
5.7-6.1 l/100 km 41.3 - 38.6 US mpg
49.6 - 46.3 UK mpg
17.5 - 16.4 km/l
CO2 emissions (NEDC)
131-140 g/km
Fuel Type
Petrol (Gasoline)
Acceleration 0 - 100 km/h
8.2 sec
Acceleration 0 - 62 mph
8.2 sec
Acceleration 0 - 60 mph (Calculated by Auto-Data.net)
7.8 sec
Maximum speed
236 km/h 147 mph
Emission standard
Euro 6d
Weight-to-power ratio
9.2 kg/Hp, 108.9 Hp/tonne
Weight-to-torque ratio
5.6 kg/Nm, 177.5 Nm/tonne

Engine specs

Power
184 Hp @ 5000-6500 rpm.
Power per litre
92.1 Hp/l
Torque
300 Nm @ 1350-4000 rpm. 221 lb.-ft. @ 1350-4000 rpm.
Engine layout
Front, Longitudinal
Engine Model/Code
B48B20A
Engine displacement
1998 cm3 121.93 cu. in.
Number of cylinders
4
Engine configuration
Inline
Cylinder Bore
82 mm 3.23 in.
Piston Stroke
94.6 mm 3.72 in.
Compression ratio
11:1
Number of valves per cylinder
4
Fuel injection system
Direct injection
Engine aspiration
TwinPower Turbo, Intercooler
Valvetrain
VALVETRONIC
Engine oil capacity
5.25 l 5.55 US qt | 4.62 UK qt
Engine oil specification
Log in to see.Log in to see.
Coolant
10 l 10.57 US qt | 8.8 UK qt
Engine systems
Start & Stop System
Particulate filter

Volume and weights

Kerb Weight
1690 kg 3726 lbs.
Max. weight
2185 kg 4817 lbs.
Max load
495 kg 1091 lbs.
Trunk (boot) space - minimum
300 l 10.6 cu. ft.
Trunk (boot) space - maximum
385 l 13.6 cu. ft.
Fuel tank capacity
59 l 15.59 US gal | 12.98 UK gal
Permitted trailer load with brakes (12%)
1600 kg 3527 lbs.
Permitted trailer load without brakes
750 kg 1653 lbs.
Permitted towbar download
75 kg 165 lbs.

Dimensions

Length
4768 mm 187.72 in.
Width
1852 mm 72.91 in.
Width including mirrors
2081 mm 81.93 in.
Height
1384 mm 54.49 in.
Wheelbase
2851 mm 112.24 in.
Front track
1575 mm 62.01 in.
Rear (Back) track
1611 mm 63.43 in.
Front overhang
858 mm 33.78 in.
Rear overhang
1059 mm 41.69 in.
Ride height (ground clearance)
124 mm 4.88 in.
Drag coefficient (Cd)
0.28
Minimum turning circle (turning diameter)
11.4 m 37.4 ft.

Drivetrain, brakes and suspension specs

Drivetrain Architecture
The Internal combustion engine (ICE) drives the rear wheels of the vehicle.
Drive wheel
Rear wheel drive
Number of gears and type of gearbox
8 gears, automatic transmission Steptronic
Front suspension
Double wishbone
Rear suspension
Independent multi-link suspension
Front brakes
Ventilated discs
Rear brakes
Ventilated discs
Assisting systems
ABS (Anti-lock braking system)
Steering type
Steering rack and pinion
Power steering
Electric Steering
Tire size
225/50 R17 98Y XL
Wheel rim size
7.5J x 17