BMW
BMW 4 Series G23 (2020–2024) Specs
Specifications, engines, dimensions and technical data.
Gen 2
2020 - 2025
G23
Cabriolet
W
L
H
WB
GC
Boot
Engine
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Power
—
Fuel
—
Gears
—
Platform
—
Body Style
Chassis
Engines
Quick Specs
Fuel
Fuel
Combined
Combined
Chassis & Body
Engine Lineup
| Trans | Engine | Gears | HP | Fuel | CO₂ |
|---|---|---|---|---|---|
| AT | 420d Mild Hybrid Steptronic | 8 | 190 HP | Diesel | — |
| MT | 420i xDrive Steptronic | 8 | 184 HP | Petrol | — |
| AT | 430d Mild Hybrid Steptronic | 8 | 286 HP | Diesel | — |
| AT | 430i Steptronic | 8 | 258 HP | Petrol | — |
| AT | M440d Mild Hybrid xDrive Steptronic | 8 | 340 HP | Diesel | — |
| AT | M440i Mild Hybrid xDrive Steptronic | 8 | 374 HP | Petrol | — |
| AT | M440i Mild Hybrid xDrive Steptronic | 8 | 382 HP | Petrol | — |
Note: Performance figures may vary based on market and conditions.
BMW 4 Series G23 overview
The BMW 4 Series (G23) is the 2nd generation of the 4 Series, built from 2020 to 2024. It is offered as a Cabriolet with 9 engines (petrol, diesel), from 170 HP to 382 HP. The 430i (258 Hp) Steptronic accelerates from 0 to 100 km/h in 6.2 s, reaches a top speed of 250 km/h and is 4768 mm long.
How much horsepower does the BMW 4 Series have?
The BMW 4 Series (G23) has 170 HP to 382 HP, depending on the engine: 2.0 B48 (170 HP), 2.0 N20 (184 HP), 2.0 B47 (190 HP), 2.0 B48 (245 HP), 2.0 B48 (258 HP), 3.0 B57 (286 HP), 3.0 B57 (340 HP), 3.0 B58 (374 HP), 3.0 B58 (382 HP).
What engines are available for the BMW 4 Series?
The BMW 4 Series is available with 9 engines: 2.0 B48 (170 HP, petrol), 2.0 N20 (184 HP, petrol), 2.0 B47 (190 HP, diesel), 2.0 B48 (245 HP, petrol), 2.0 B48 (258 HP, petrol), 3.0 B57 (286 HP, diesel), 3.0 B57 (340 HP, diesel), 3.0 B58 (374 HP, petrol), 3.0 B58 (382 HP, petrol).
What are the dimensions of the BMW 4 Series?
The BMW 4 Series is 4768 mm long, 1852 mm wide, 1384 mm tall, with a 2851 mm wheelbase.
How fast is the BMW 4 Series?
The BMW 4 Series 430i (258 Hp) Steptronic goes from 0 to 100 km/h in 6.2 s and has a top speed of 250 km/h.
Advanced Specs
Overview
| Generation | BMW 4 Series Convertible G23 |
|---|---|
| Year | 2020–2024 |
| Platform | BMW CLAR |
| Variant | 430i (258 Hp) Steptronic |
| Body type | cabriolet |
| Engine type | Fuel |
| Fuel type | Petrol |
| Seats | 4 |
| Doors | 2 |
| Emission standard | Euro 6d |
Power & torque
| Power | 258 HP |
|---|---|
| Power @ min rpm | 5000 rpm |
| Power @ max rpm | 6500 rpm |
| Torque | 400 Nm |
| Torque @ min rpm | 1550 rpm |
| Torque @ max rpm | 4400 rpm |
Performance
| Top speed | 250 km/h |
|---|---|
| 0–100 km/h | 6.2 s |
| 0–62 mph | 6.2 s |
Engine
| Engine code | B48B20O1 |
|---|---|
| Displacement | 1998 cc |
| Cylinders | 4 |
| Configuration | inline |
| Compression ratio | 10.2 |
| Valves per cylinder | 4 |
| Injection system | Direct Injection |
| Aspiration | Twin Power Turbo Intercooler |
| Oil capacity | 5.3 L |
| Coolant | 9.8 L |
| Engine layout | Front Longitudinal |
| Engine systems | Start Stop Systemparticulate Filter |
Drivetrain & transmission
| Drive | Rear Wheel Drive |
|---|---|
| Powertrain architecture | Internal Combustion Engine |
| Drivetrain architecture | The Internal Combustion Engine Ice Drives The Rear Wheels Of The Vehicle |
| Gearbox type | Torque Converter |
| Gears | 8 |
| Gearbox code | 8hp51 |
| Gearbox manufacturer | zf |
Dimensions
| Length | 4768 mm |
|---|---|
| Width | 1852 mm |
| Height | 1384 mm |
| Wheelbase | 2851 mm |
| Front track | 1575 mm |
| Rear track | 1611 mm |
| Boot space | 300 – 385 L |
| Ground clearance | 124 mm |
| Turning circle | 11.4 m |
Mass
| Kerb weight | 1715 kg |
|---|---|
| Max weight | 2200 kg |
| Max load | 485 kg |
Consumption & emissions
| Fuel combined (WLTP) | 6.9 L/100km |
|---|---|
| Fuel combined (NEDC) | 6.0 L/100km |
| CO₂ (WLTP) | 158 g/km |
| CO₂ (NEDC) | 138 g/km |
| Fuel tank | 59.0 L |
Chassis & brakes
| Front suspension | Double Wishbone |
|---|---|
| Rear suspension | Independent Multi Link Suspension |
| Front brakes | Ventilated Discs |
| Rear brakes | Ventilated Discs |
| Steering type | Steering Rack And Pinion |
| Power steering | Electric Steering |
| Tire size | 225/50 R17 98Y XL |
| Wheel rims | 7.5J x 17 |
| Assisting systems | Abs Anti Lock Braking System |
Efficiency ratios
| Weight-to-power | 6.6 kg/Hp, 150.4 Hp/tonne |
|---|---|
| Weight-to-torque | 4.3 kg/Nm, 233.2 Nm/tonne |
Other
| Start Of Production | 2020 |
|---|---|
| End Of Production | 2024 |
| Width Including Mirrors | 2081 |
| Front Overhang | 858 |
| Rear Overhang | 1059 |
Performance
Engine speed (1k/rpm)
! Figures from catalog data; real-world values may differ.
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