Full specifications
BMW 4-Series 420i Cabrio Specifications
Complete technical specifications for the BMW 4-Series 420i Cabrio — 184 hp, petrol, convertible, 2017. Performance highlights: 0–100 km/h in 8.2 s, top speed 230 km/h (143 mph), consumption 6.2 l/100km (45.6 mpg UK · 37.9 mpg US).
General · 2 fields
Vehicle class
Passenger Car
Market segment
G (Sporty)
Fuel & Engine · 11 fields
Bore
82 mm
Catalytic converter
Closed-loop
Compression ratio
11 :1
Fuel system
Direct Injection
Fuel tank capacity
60 L (15.9 gal US)
RPM at 100 km/h
1,850 rpm
RPM at 130 km/h
2,400 rpm
Stroke
95 mm
Turbocharged
Yes
Valve actuation
DOHC
Valves per cylinder
4
Consumption (NEDC) · 2 fields
Urban consumption
8.0 l/100km (35.3 mpg UK · 29.4 mpg US)
Extra-urban consumption
5.1 l/100km (55.4 mpg UK · 46.1 mpg US)
Chassis · 11 fields
Front spring type
Coil Springs
Rear spring type
Coil Springs
Front anti-roll bar
Yes
Rear anti-roll bar
Yes
Front brakes
Ventilated Discs
Front suspension
MacPherson Struts
Rear brakes
Ventilated Discs
Rear suspension
Multilink
Turning circle
11.3 m (37.1 ft)
Front tyre size
225/50R17
Rear tyre size
225/50R17
Weights · 8 fields
Ball pressure
75 kg (165 lb)
Front axle weight
960 kg (2,116 lb)
Gross vehicle weight
2,170 kg (4,784 lb)
Kerb weight
1,675 kg (3,693 lb)
Payload
495 kg (1,091 lb)
Rear axle weight
1,250 kg (2,756 lb)
Towing weight (braked)
1,400 kg (3,086 lb)
Towing weight (unbraked)
695 kg (1,532 lb)
Luggage / Load · 1 fields
Boot capacity
220 L (7.8 cu ft)
Exterior Sizes · 7 fields
Length
4,640 mm (182.7 in)
Width
1,825 mm (71.9 in)
Height
1,384 mm (54.5 in)
Wheelbase
2,810 mm (110.6 in)
Front track
1,544 mm
Ground clearance
130 mm (5.1 in)
Rear track
1,593 mm
Safety · 30 fields
Crash test rating
5 stars
ABS
Standard
EBD
Standard
Brake assist
Standard
ESP
Standard
Traction control
Standard
Limited slip differential
Not Available
Electronic damping
Not Available
Automatic level control
Not Available
Hill start assist
Standard
Forward collision warning
Not Available
Autonomous emergency braking
Not Available
Pedestrian AEB
Not Available
Lane keeping assist
Optional
Steering assist
Not Available
Blind spot detection
Optional
Fatigue detection
Optional
Tyre pressure monitoring
Standard
Night vision
Not Available
Pre-crash system
Not Available
High beam assist
Optional
Traffic sign recognition
Optional
Cross traffic warning
Not Available
Driver airbag
Standard
Passenger airbag
Standard
Side airbags
Standard (Front)
Curtain airbags
Standard (Front)
Driver knee airbag
Not Available
ISOFIX
Standard
Emergency call (eCall)
Standard
Comfort · 15 fields
Central locking
Standard
Keyless entry/start
Optional
Smartphone key
Not Available
Start button
Standard
Power steering
Standard
Steering wheel controls
Not Available
Electric windows
Standard (Front & Rear)
Cruise control
Standard
Air conditioning
Standard (Automatic)
Dual zone climate
Standard
Parking sensors
Standard (Rear)
Reverse camera
Optional
Park assist
Optional
Electric parking brake
Not Available
Start/stop system
Standard
Interior · 32 fields
Seat height adjustment
Standard (Driver & Passenger)
Lumbar support
Optional
Electric seat adjustment
Standard
Heated seats
Optional
Ventilated seats
Not Available
Sport seats
Optional
Leather steering wheel
Standard
Adjustable steering
Standard
Heated steering wheel
Optional
Leather upholstery
Optional
Rear headrests
Standard
Folding rear seats
Standard (Split)
Sliding rear seats
Not Available
Armrest
Standard
Pre-heating
Not Available
Auto-dimming mirror
Standard
Rev counter
Standard
Trip computer
Standard
Digital instruments
Not Available
Head-up display
Optional
Audio system
Standard
Digital radio (DAB+)
Optional
Audio steering controls
Standard
Audio input
Standard
Navigation
Optional
Bluetooth
Standard
Wireless charging
Not Available
Apple CarPlay
Optional
Android Auto
Not Available
OTA updates
Not Available
Outside temperature
Standard
Reading lights
Standard
Exterior · 21 fields
Rain sensor
Standard
Alloy wheels
Standard
Sunroof
Optional
Panoramic roof
Not Available
Roof rails
Not Available
Metallic paint
Optional
Body-coloured bumpers
Standard
Tinted glass
Standard
Privacy glass
Optional
Electric boot
Standard
Electric mirrors
Standard (Heated)
Folding mirrors
Optional
Auto-dimming ext. mirrors
Optional
Indicators in mirrors
Standard
Front fog lights
Standard
Automatic headlights
Standard
Xenon headlights
Not Available
LED headlights
Standard
LED tail lights
Standard
Headlight washers
Not Available
Alarm
Optional
Service & Warranty · 3 fields
Service interval
variable / 2 years
General warranty
2 years, onbeperkt
Body warranty
12 years
Costs · 1 fields
Road tax quarterly (NL)
€321