BMW 4 Series Convertible (G23)
420i (184 Hp) Steptronic
2020 – 2024 · Petrol · Rear-wheel drive · 8-speed Steptronic automatic
- Power
- 184 Hp
- 0–100 km/h
- 8.2 s
- Top speed
- 236 km/h147 mph
- Combined
- 5.7 - 6.1 l/100 km38.6 - 41.3 mpg
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
Performance specs
- Fuel consumption (urban)
- 7.1 - 7.4 l/100 km31.8 - 33.1 mpg
- Fuel consumption (extra urban)
- 4.9 - 5.4 l/100 km43.6 - 48.0 mpg
- Fuel consumption (combined)
- 5.7 - 6.1 l/100 km38.6 - 41.3 mpg
- Consumption test cycle
- NEDC
- CO2 emissions
- 131 - 140 g/km211 - 225 g/mi
- Fuel type
- Petrol (Gasoline)
- Acceleration 0 - 100 km/h
- 8.2 s
- Acceleration 0 - 60 mph (calculated)
- 7.8 s
- Acceleration 0 - 200 km/h
- —
- Maximum speed
- 236 km/h147 mph
- Emission standard
- Euro 6d
- Weight-to-power ratio
- 9.2 kg/Hp20.3 lb/Hp
- Weight-to-torque ratio
- 5.6 kg/Nm16.7 lb/lb-ft
Engine specs
- Power
- 184 Hp
- Power at
- 5000 - 6500 rpm
- Power per litre
- 92.1
- Torque
- 300 Nm221 lb-ft
- Torque at
- 1350 - 4000 rpm
- Engine layout
- Front, longitudinal
- Engine model/code
- B48B20A
- Engine displacement
- 1998 cm³1998 cm³ (122 cu in)
- Number of cylinders
- 4
- Engine configuration
- Inline
- Cylinder bore
- 82 mm3.2 in
- Piston stroke
- 94.6 mm3.7 in
- Compression ratio
- 11 : 1
- Number of valves per cylinder
- 4
- Fuel injection system
- Direct injection
- Engine aspiration
- TwinPower Turbo, intercooler
- Engine oil capacity
- 5.25 l1.4 gal
- Coolant
- 10 l2.6 gal
- Engine systems
- Start & Stop System, Particulate filter
Space, volume and weights
- Kerb weight
- 1690 kg3726 lb
- Max. weight
- 2185 kg4817 lb
- Max load
- 495 kg1091 lb
- Trunk (boot) space - minimum
- 300 l79.3 gal
- Trunk (boot) space - maximum
- 385 l101.7 gal
- Fuel tank capacity
- 59 l15.6 gal
- Permitted trailer load with brakes (12%)
- 1600 kg3527 lb
- Permitted trailer load without brakes
- 750 kg1653 lb
- Permitted towbar download
- 75 kg165 lb
Dimensions
- Length
- 4768 mm187.7 in
- Width
- 1852 mm72.9 in
- Width including mirrors
- 2081 mm81.9 in
- Height
- 1384 mm54.5 in
- Wheelbase
- 2851 mm112.2 in
- Front track
- 1575 mm62.0 in
- Rear (Back) track
- 1611 mm63.4 in
- Ride height (ground clearance)
- 124 mm4.9 in
- Drag coefficient (Cd)
- 0.28
- Minimum turning circle
- 11.4 m37.4 ft
Drivetrain, brakes and suspension
- 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
- Tires size
- 225/50 R17 98Y XL
- Wheel rims size
- 7.5J x 17