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BMW 4 Series G23 Convertible (2020)

Neoscore 74%NEX score 80%

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Product Overview

BMW G23 4-series convertible is the drop-top version of the G22 4-series coupe. A soft-top, the G23 represents a departure from the previous two generations of BMW 3/4-series, both of which had a four-section hard-top.
Like the G22 coupe, the new 4-series convertible wears at the front BMW's reimagined upright "double-kidney grille". The imposing grille is flanked by slim LED headlights or, optionally, BMW Laserlight.
BMW manages to maintain the 50:50 weight distribution while increasing chassis rigidity. Six-cylinder and diesel powertrains now feature 48V mild-hybrid technology.

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Ratings

What we found**

Neoscore: 74% (not directly comparable across industries)
Pros
  • Good 0.27 drag coefficient
  • Still RWD-oriented
Cons
  • B58 tied to AWD
  • Engines too small
  • Lost hard top
  • No manual transmission
  • Ugly
  • MacPherson front suspension

What external reviewers found***

NEX score: 80% (not directly comparable across industries)
Pros
  • Excellent infotainment
  • Impressive range
  • Decent infotainment system
  • Gorgeous interior
  • Comfortable ride
Cons
  • Lack of standard infotainment tech
  • Lackluster infotainment system
  • No adaptive cruise control
  • No rear-drive option
  • Slightly heavier than the coupé
  • Expensive for what you get
Read More

Find Related Products (incl. referral links)*

Specifications

Variants:
420d
420i
430d
430i
M440i xDrive

Capacity

420dCargo Capacity
385 L / 13.6 cu-ft
420iCargo Capacity
385 L / 13.6 cu-ft
430dCargo Capacity
300 L / 10.6 cu-ft ~ 385 L / 13.6 cu-ft
430iCargo Capacity
385 L / 13.6 cu-ft
M440i xDriveCargo Capacity
385 L / 13.6 cu-ft
420dCoolant Capacity
7.0 L / 7.4 qt
420iCoolant Capacity
10.0 L / 10.6 qt
430dCoolant Capacity
7.7 L / 8.1 qt
430iCoolant Capacity
9.8 L / 10.4 qt
M440i xDriveCoolant Capacity
10.5 L / 11.1 qt
420dEngine Oil Capacity
5.5 L / 5.8 qt
420iEngine Oil Capacity
5.2 L / 5.5 qt
430dEngine Oil Capacity
7.0 L / 7.4 qt
430iEngine Oil Capacity
5.2 L / 5.5 qt
M440i xDriveEngine Oil Capacity
7.2 L / 7.6 qt
Fuel Capacity
59.0 L / 15.6 gal
Passengers
4
420dPayload
495 kg / 1091 lbs
420iPayload
495 kg / 1091 lbs
430dPayload
500 kg / 1102 lbs
430iPayload
485 kg / 1069 lbs
M440i xDrivePayload
500 kg / 1102 lbs

Chassis

420dBrakes
Vented disc w/ single-piston floating calipers
420iBrakes
Vented disc w/ single-piston floating calipers
430dBrakes
Vented disc w/ single-piston floating calipers
Brakes | Front
Ventilated discs
430iBrakes | Front
Vented disc brakes w/ four-piston fixed calipers
Brakes | Rear
single-piston floating calipers
Power Steering
Electric Steering
Steering Ratio
14.1
Suspension | Front
MacPherson
Suspension | Rear
Multi-link (five-link)
420dTire Size
225/50 R17 98Y XL
420iTire Size
225/50 R17 98Y XL
430dTire Size
225/50 R17
430iTire Size
225/50 R17 98Y XL
M440i xDriveTire Size
Front wheel tires: 225/45 R18 95Y XL Rear wheel tires: 255/40 R18 99Y XL
420dTurning Circle
11.4 m / 37.4 ft
420iTurning Circle
11.4 m / 37.4 ft
430dTurning Circle
11.4 m / 37.4 ft
430iTurning Circle
11.4 m / 37.4 ft
M440i xDriveTurning Circle
12.0 m / 39.4 ft

Construction

Battery | Capacity
0.5 kWh (gross)
420dBody Style
2-door mild-hybrid Convertible
420iBody Style
2-door Convertible
430dBody Style
2-door mild-hybrid Convertible
430iBody Style
2-door Convertible
M440i xDriveBody Style
2-door mild-hybrid Convertible

Dimensions

420dGround Clearance
124 mm / 4.9 in
420iGround Clearance
124 mm / 4.9 in
430dGround Clearance
124 mm / 4.9 in
430iGround Clearance
124 mm / 4.9 in
M440i xDriveGround Clearance
126 mm / 5.0 in
420dSize | Height
1384 mm / 54.5 in
420iSize | Height
1384 mm / 54.5 in
430dSize | Height
1384 mm / 54.5 in
430iSize | Height
1384 mm / 54.5 in
M440i xDriveSize | Height
1394 mm / 54.9 in
420dSize | Length
4768 mm / 187.7 in
420iSize | Length
4768 mm / 187.7 in
430dSize | Length
4768 mm / 187.7 in
430iSize | Length
4768 mm / 187.7 in
M440i xDriveSize | Length
4770 mm / 187.8 in
420dSize | Width
1852 mm / 72.9 in
420iSize | Width
1852 mm / 72.9 in | 2081 mm / 81.9 in (mirror unfolded)
430dSize | Width
1852 mm / 72.9 in
430iSize | Width
1852 mm / 72.9 in | 2081 mm / 81.9 in (mirror unfolded)
M440i xDriveSize | Width
1852 mm / 72.9 in
420dTrack Width | Front
1575.0 mm / 62.0 in
420iTrack Width | Front
1575.0 mm / 62.0 in
430dTrack Width | Front
1573.0 mm / 61.9 in
430iTrack Width | Front
1575.0 mm / 62.0 in
M440i xDriveTrack Width | Front
1575.0 mm / 62.0 in
420dTrack Width | Rear
1611.0 mm / 63.4 in
420iTrack Width | Rear
1611.0 mm / 63.4 in
430dTrack Width | Rear
1612.0 mm / 63.5 in
430iTrack Width | Rear
1611.0 mm / 63.4 in
M440i xDriveTrack Width | Rear
1611.0 mm / 63.4 in
420dWeight
1775.0 kg / 3913.2 lbs
420iWeight
1690.0 kg / 3725.8 lbs
430dWeight
1880.0 kg / 4144.7 lbs
430iWeight
1715.0 kg / 3780.9 lbs
M440i xDriveWeight
1890.0 kg / 4166.7 lbs
420dWheel Size
7.5J x 17
420iWheel Size
7.5J x 17
430dWheel Size
7.5J x 17
430iWheel Size
7.5J x 17
M440i xDriveWheel Size
Front wheel rims: 7.5J x 18 Rear wheel rims: 8.5J x 18
Wheelbase
2851 mm / 112.2 in

Performance

420dAcceleration | 0 - 100 km/h
7.6 sec
420iAcceleration | 0 - 100 km/h
8.2 sec
430dAcceleration | 0 - 100 km/h
5.8 sec
430iAcceleration | 0 - 100 km/h
6.2 sec
M440i xDriveAcceleration | 0 - 100 km/h
4.9 sec
420dAcceleration | 0 - 60 mph
7.2 sec
420iAcceleration | 0 - 60 mph
7.8 sec
430dAcceleration | 0 - 60 mph
5.5 sec
430iAcceleration | 0 - 60 mph
5.9 sec
M440i xDriveAcceleration | 0 - 60 mph
4.7 sec
420dCO2 Emission
111 ~ 119 g/km
420iCO2 Emission
131 ~ 140 g/km
430dCO2 Emission
139 ~ 156 g/km
430iCO2 Emission
138 ~ 147 g/km
M440i xDriveCO2 Emission
159 ~ 169 g/km
420dCoefficient Of Drag
0.27
420iCoefficient Of Drag
0.28
430dCoefficient Of Drag
0.28
430iCoefficient Of Drag
0.28
M440i xDriveCoefficient Of Drag
0.28
420dFuel Economy
4.2 L/100km / 56.0 MPG (combined) | 4.7 L/100km / 50.0 MPG (urban) | 3.9 L/100km / 60.3 MPG (highway)
420iFuel Economy
5.7 L/100km / 41.3 MPG (combined) | 7.1 L/100km / 33.1 MPG (urban) | 4.9 L/100km / 48.0 MPG (highway)
430dFuel Economy
5.3 L/100km / 44.4 MPG (combined)
430iFuel Economy
6.0 L/100km / 39.2 MPG (combined) | 7.5 L/100km / 31.4 MPG (urban) | 5.2 L/100km / 45.2 MPG (highway)
M440i xDriveFuel Economy
6.9 L/100km / 34.1 MPG (combined) | 8.9 L/100km / 26.4 MPG (urban) | 5.8 L/100km / 40.6 MPG (highway)
420dTop Speed
236.0 km/h / 146.6 mph
420iTop Speed
236.0 km/h / 146.6 mph
430dTop Speed
250.0 km/h / 155.3 mph
430iTop Speed
250.0 km/h / 155.3 mph
M440i xDriveTop Speed
250.0 km/h / 155.3 mph
420dTowing Capacity
750 kg / 1653 lbs (w/o brakes) | 1600 kg / 3527 lbs (w/ brakes @ 12% gradient)
420iTowing Capacity
750 kg / 1653 lbs (w/o brakes) | 1600 kg / 3527 lbs (w/ brakes @ 12% gradient)
430dTowing Capacity
750 kg / 1653 lbs (w/o brakes) | 1800 kg / 3968 lbs (w/ brakes @ 12% gradient)
430iTowing Capacity
750 kg / 1653 lbs (w/o brakes) | 1600 kg / 3527 lbs (w/ brakes @ 12% gradient)
M440i xDriveTowing Capacity
750 kg / 1653 lbs (w/o brakes) | 1800 kg / 3968 lbs (w/ brakes @ 12% gradient)

Powertrain

420dDrivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
420iDrivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
430dDrivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
430iDrivetrain Layout
Front-engine (longitudinal), Rear-wheel drive
M440i xDriveDrivetrain Layout
Front-engine (longitudinal), All-wheel drive
Emission Standard
Euro 6d
420dEngine
B47D20B
420iEngine
B48B20A
430dEngine
B57D30B
430iEngine
B48B20B
M440i xDriveEngine
B58B30B
420dEngine | Bore
84.0 mm / 3.3 in
420iEngine | Bore
82.0 mm / 3.2 in
430dEngine | Bore
84.0 mm / 3.3 in
430iEngine | Bore
82.0 mm / 3.2 in
M440i xDriveEngine | Bore
82.0 mm / 3.2 in
420dEngine | Compression Ratio
16.5:1
420iEngine | Compression Ratio
11.0:1
430dEngine | Compression Ratio
16.5:1
430iEngine | Compression Ratio
10.2:1
M440i xDriveEngine | Compression Ratio
10.2:1
420dEngine | Displacement
2.0 L / 121.7 cu-in / 1995.0 cc
420iEngine | Displacement
2.0 L / 121.9 cu-in / 1998.0 cc
430dEngine | Displacement
3.0 L / 182.6 cu-in / 2993.0 cc
430iEngine | Displacement
2.0 L / 121.9 cu-in / 1998.0 cc
M440i xDriveEngine | Displacement
3.0 L / 182.9 cu-in / 2998.0 cc
420dEngine | Power
190.0 hp / 141.7 kW @ 4000 rpm + 11.0 hp / 8.2 kW (electric motor)
420iEngine | Power
184.0 hp / 137.2 kW @ 5000-6500 rpm
430dEngine | Power
286.0 hp / 213.3 kW @ 4000 rpm + 11.0 hp / 8.2 kW (electric motor)
430iEngine | Power
258.0 hp / 192.4 kW @ 5000-6500 rpm
M440i xDriveEngine | Power
374.0 hp / 278.9 kW @ 5500-6500 rpm + 11.0 hp / 8.2 kW (electric motor)
420dEngine | Specific Output
95.2 hp/L / 1.6 hp/cu-in
420iEngine | Specific Output
92.1 hp/L / 1.5 hp/cu-in
430dEngine | Specific Output
95.6 hp/L / 1.6 hp/cu-in
430iEngine | Specific Output
129.1 hp/L / 2.1 hp/cu-in
M440i xDriveEngine | Specific Output
124.7 hp/L / 2.0 hp/cu-in
420dEngine | Stroke
90.0 mm / 3.5 in
420iEngine | Stroke
94.6 mm / 3.7 in
430dEngine | Stroke
90.0 mm / 3.5 in
430iEngine | Stroke
94.6 mm / 3.7 in
M440i xDriveEngine | Stroke
94.6 mm / 3.7 in
420dEngine | Torque
400 Nm / 295.0 lb-ft @ 1750-2500 rpm
420iEngine | Torque
300 Nm / 221.3 lb-ft @ 1350-4000 rpm
430dEngine | Torque
650 Nm / 479.4 lb-ft @ 1500-2500 rpm
430iEngine | Torque
400 Nm / 295.0 lb-ft @ 1550-4400 rpm
M440i xDriveEngine | Torque
500 Nm / 368.8 lb-ft @ 1900-5000 rpm
420dEngine | Type
Twin-scroll turbocharged commonrail diesel inline-4 engine with 4 values per cylinder
420iEngine | Type
Twin-scroll turbocharged direct-injected petrol inline-4 engine with 4 values per cylinder
430dEngine | Type
Twin-scroll turbocharged commonrail diesel inline-6 DOHC engine with 4 values per cylinder
430iEngine | Type
Twin-scroll turbocharged direct-injected petrol inline-4 engine with 4 values per cylinder
M440i xDriveEngine | Type
Twin-scroll turbocharged direct-injected petrol inline-6 engine with 4 values per cylinder
Transmission | Gears
8-speed
Transmission | Type
Automatic Steptronic

Production

Availability
2021-03
420dAvailability
2020
420iAvailability
2020
430dAvailability
2021
430iAvailability
2020
M440i xDriveAvailability
2020
Debut
2020-09-30
Made In
Germany

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3rd-Party Review Videos

External Reviews

autocar[1]

Sentiment Score 74%
Reviewers from autocar have found the following***:
BMW M4 Convertible has a meatier 3.0-litre six-cylinder engine. It sends 369bhp and 369lb ft to both axles via xDrive all-wheel drive. Roof-up isolation is very good, if not class leading, and with the wind deflector fitted, long top-down journeys are no sweat.
Find the original article here.
Pros
  • Comfortable to drive
  • Decent infotainment system
Cons
  • No rear-drive option

autoexpress[2]

Sentiment Score 78%
Reviewers from autoexpress have found the following***:
BMW has bolstered its open-top range with the new 4 Series Convertible. While most buyers choose a drop-top to enjoy open-air motoring, the most significant change to this G23 generation comes when the inevitable UK weather hits. This new version has ditched the old car's folding hard-top and replaced it with a fabric item. It's still better to drive than any other four-seat cabrio on the market for similar money.
Find the original article here.
Pros
  • Fantastic infotainment
  • Impressive range
Cons
  • Slightly heavier than the coupé

carwow[3]

Sentiment Score 74%
Reviewers from carwow have found the following***:
The BMW 4 Series Convertible is a four-seater, but has two doors. It has 385 litres of boot space when the roof is up, but this reduces down to 300 litres when it's folded away. There are three petrols and three diesels, some coming with mild hybrid technology. Prices start at £45 for the entry-level model and go up to £59645 for the top-spec M440d.
Find the original article here.
Pros
  • Comfortable to drive
  • Lots of engines to choose from
Cons
  • Lack of standard infotainment tech

cnet[4]

Sentiment Score 88%
Reviewers from cnet have found the following***:
The 2021 BMW 430i Convertible's starting price of $54095 isn't too shabby. The top itself is a breeze to operate, working at up to 31 mph. iDrive takes a little while to get used to, but once you have it down, it's easy to use with minimal distraction.
Find the original article here.
Pros
  • Gorgeous interior
  • Comfortable ride
  • Excellent infotainment
Cons
  • No adaptive cruise control
  • Expensive for what you get

cnet[5]

Sentiment Score 86%
Reviewers from cnet have found the following***:
The 3.0-liter turbo-I6 is an absolute sweetheart, strong, sonorous and practically as smooth as an electric motor. M440i examples come with an M Sport Differential, which equalizes torque between the left and right rear wheels for better traction. The interior is bright and airy, suitably (if not overwhelmingly) luxurious, too.
Find the original article here.
Pros
  • Powerful turbo-I6
  • Impressive acceleration
  • Comfortable ride
Cons
  • Lackluster infotainment system

User Reviews

References

1. ^ BMW 4 Series Convertible M440i 2021 UK review. [autocar]. https://www.autocar.co.uk/car-review/bmw/4-series-convertible/first-drives/bmw-4-series-convertible-m440i-2021-uk-review. 2021-06-16. Retrieved 2021-06-23.
2. ^ New BMW M440i Convertible 2021 review. [autoexpress]. https://www.autoexpress.co.uk/bmw/4-series/355661/new-bmw-m440i-convertible-2021-review. 2021-07-28. Retrieved 2021-07-28.
3. ^ BMW 4 Series Convertible Review. [carwow]. https://www.carwow.co.uk/bmw/4-series-convertible. Retrieved 2021-03-22.
4. ^ 2021 BMW 430i Convertible review: Ready for summer. [cnet]. https://www.cnet.com/roadshow/reviews/2021-bmw-4-series-430i-convertible-review/. 2021-05-28. Retrieved 2021-05-28.
5. ^ 2021 BMW M440i Convertible review: An engaging cruiser. [cnet]. https://www.cnet.com/roadshow/reviews/2021-bmw-4-series-m440i-convertible-review/. 2021-05-14. Retrieved 2021-05-15.

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