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BMW 4 Series 420i Steptronic M-Sport Cabrio Equipment — Second Generation Restyling 1

The BMW 4 Series 420i Steptronic M-Sport Cabrio is described here in terms of ordinary errands: the daily shopping, school runs and small loads that shape how a car is genuinely used.

2 generation, restyling 1 · Cabrio

2024

420i Steptronic

Gasoline · Automatic · RWD

At a glance

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M-Sport Cabrio

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Specifications

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Performance & powertrain

Top speed
?

The highest speed a vehicle can sustain under manufacturer test conditions. Some cars are electronically limited below their mechanical potential. Glossary entry

236 km/h
Engine type
Gasoline
Transmission
Automatic
Type of boost
?

A turbocharger or supercharger compresses the air entering the engine so a smaller engine can produce more power. Naturally aspirated engines draw air without a compressor. Glossary entry

Turbo
Type of drive
?

Which wheels receive power: front-wheel drive, rear-wheel drive or all-wheel drive. All-wheel drive can send power to every wheel for extra traction. Glossary entry

RWD
Bore and stroke
?

The diameter of a cylinder (bore) and the distance the piston travels inside it (stroke). Together they determine the displacement of the engine. Glossary entry

82 x 94.6 mm
Engine capacity
?

The total volume swept by all pistons inside the cylinders, usually stated in cubic centimetres or litres. Larger displacement often means more power but higher consumption. Glossary entry

1998 cm³
Engine location
Front, longitudinal
Number of gears
?

How many fixed forward ratios a gearbox offers. More gears can improve economy and refinement; continuously variable transmissions have no fixed steps. Glossary entry

8
Maximum power
?

A unit of engine or motor output. One metric horsepower is about 0.735 kilowatts. Peak power is normally reached at high engine speed. Glossary entry

184 hp
Maximum power, kw
?

A unit of engine or motor output. One metric horsepower is about 0.735 kilowatts. Peak power is normally reached at high engine speed. Glossary entry

135 kW
Compression ratio
?

The ratio between the largest and smallest volume of a cylinder as the piston moves. Higher ratios improve efficiency but may require higher-octane fuel. Glossary entry

11
Maximum power rpm
6500 rpm
Maximum torque N⋅m
300 N⋅m
Maximum torque rpm
4000 rpm
Acceleration to 100
?

The time a vehicle needs to reach 100 km/h from a standstill, a common shorthand for overall performance. Glossary entry

8.2 s
Engine power system
Direct injection (direct)
Number of cylinders
4
Valves per cylinder
?

The number of intake and exhaust valves in each cylinder. Four valves per cylinder is common and helps the engine breathe at higher speeds. Glossary entry

4
Cylinder arrangement
Inline
Maximum power ICE
Not provided
Maximum power ICE
Not provided

Energy & emissions

ECO class
Euro 6
Battery power
Not provided
Fuel grade
95
Mild Hybrid
?

A car with a small electric motor and battery that assist the combustion engine and recover braking energy but cannot drive on electricity alone. Glossary entry

MHEV48V
Battery type
Not provided
CO2 emissions
?

The amount of carbon dioxide released per kilometre under a standardised test. Lower figures usually go hand in hand with lower fuel consumption. Glossary entry

Not provided
Full charge home
Not provided
Power consumption
Not provided
Fuel tank capacity
59 l
Full public charging time
Not provided
Driving range, maximum
?

The distance an electric or plug-in vehicle can travel on a full charge under a stated test cycle. Temperature, speed and load change the real result. Glossary entry

Not provided
Driving range, minimum
?

The distance an electric or plug-in vehicle can travel on a full charge under a stated test cycle. Temperature, speed and load change the real result. Glossary entry

Not provided
Fuel consumption city
Not provided
Average consumption
6.9 l
Fuel consumption highway
Not provided

Dimensions & body

Doors number
2
Number of seats
4
Width
Not provided
Height
Not provided
Length
Not provided
Body type
Cabrio
Wheelbase
?

The distance between the centres of the front and rear wheels. A longer wheelbase usually gives more cabin space and a calmer ride; a shorter one helps agility and parking. Glossary entry

Not provided
U-turn diameter
Not provided
Depth of the ford to be crossed
Not provided
Body style
Drop-top
Rear track width
?

The distance between the centres of the two wheels on the same axle. A wider track generally improves stability in corners. Glossary entry

Not provided
Trunk volume max
Not provided
Trunk volume min
Not provided
Front track width
?

The distance between the centres of the two wheels on the same axle. A wider track generally improves stability in corners. Glossary entry

Not provided
Max weight
2185 kg
Curb weight
?

The weight of the vehicle with all standard equipment and fluids but without passengers or cargo. Glossary entry

1690 kg
Ground clearance, maximum
?

The gap between the lowest point of the underbody and the road. More clearance helps on rough roads and steep driveway ramps. Glossary entry

Not provided
Ground clearance, minimum
?

The gap between the lowest point of the underbody and the road. More clearance helps on rough roads and steep driveway ramps. Glossary entry

124 mm

Identity & configuration

Vehicle class
D
Right-hand drive
No

Additional specifications

Stop
Not provided
Start
2024-05-01
Wheel size
Not provided
Rear brakes
Ventilated disc
Front brakes
Ventilated disc
Rear suspension
Independent, spring
Front suspension
Independent, spring

Trim equipment

Dimensions & body

Number of seats
4

Additional specifications

Driver Assistance Systems
Anti-lock braking system (ABS), Electronic stability program (ESP), Emergency brake assist (BAS, EBD, EBA), Automatic slip regulation (ASR), Pedestrian detection system, Cyclist detection system, Smart Brake Support (Rear Crossing) (SBS-RC) System
Stop
Not provided
View
Light sensor, Rain sensor
Start
2024-10-01
Airbags
Driver's airbag, Passenger airbag, Side front airbags
Camera
Rear-view camera
Isofix
Isofix for the back row
Material
Alloy
Comfort
Keyless entry system, Start-stop system, Power mirrors, Folding mirrors, Electronic parking brake, Self-darkening exterior mirrors, Self-darkening central mirror
Exterior
External styling, Spoiler
Interior
Tinted glass, Power window
Safety
Driver drowsiness detection
Headlights
LED headlights
Sound
Audio system
Diameter
R19 ″
Multimedia
Carplay, Android Auto
Cruise control
Adaptive Cruise Control
Parking assist system
Front parking sensors, Rear parking sensors, Automatic parking system
Power steering
Power steering
Air conditioner
Dual-zone climate control
Seat position memory
Driver's seat with memory function
Electric heating
Side mirrors
Steering wheel adjustment
Steering wheel height adjustment, Steering wheel reach adjustment
Power seat adjustment
Driver's seat adjustment

Not provided means the source has no value. Zero remains zero. Units are shown as supplied; range test cycles are only stated when known.

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Estimates use only the figures you enter, in your own currency. No live fuel prices or emissions data are used.

Units

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Comfort and Convenience

Preferred seating position differs from person to person, because height, arm length and driving habits all influence where the wheel and pedals feel natural. What suits one regular driver often needs changing for another.

Safety and Driver Assistance

Checking where the essential controls sit before setting off is simple preparation. Knowing in advance how to clear a misted screen or switch the lights saves searching later, when the road already needs full attention.

Multimedia and Connectivity

A chain of errands can drain a phone that is navigating between stops. Where charging is available it keeps the device usable all day; calls and music are separate functions, each worth arranging before departure.