In-depth reviews

BMW 4 Series Gran Coupe 420i M Sport 5dr Step Auto

Doors	5
Fuel Delivery	TURBO INJECTION
Transmission	Semi-auto
Fuel Type	Petrol
Engine Capacity - CC	1998
Trim	M Sport
Price	£47,110
Engine Power - BHP	184
Acceleration	7.9
Top Speed	146 mph
WLTP - MPG - Comb	42.2
WLTP - CO2 (g/km) - Comb	153
Length	4783 mm
Width	1852 mm
Height	1442 mm
Luggage Capacity (Seats Up)	470 l
Minimum Kerbweight	1620 kg

Driver Convenience

Active guard plus
Attentiveness assist
Automatic start/stop function
BMW ConnectedDrive online services
BMW iDrive controller on centre console
BMW service history
BMW Teleservices
Brake pad wear indicator in front and rear
Check Control warning system for monitoring of lights and door/luggage compartment open warning
Condition based service
Electric bootlid
Instrument cluster with speedometer with mph readout, tachometer, fuel gauge and oil temperature gauge
Integrated owners handbook
Language version English
Oil sensor for level and grade
On board computer - average speed, fuel consumption, outside temp display with acoustic warning, clock/date, service interval, odometer/trip meter
Run flat indicator
Shifting point display
Variable sport steering

Engine/Drivetrain/Suspension

8 speed automatic steptronic transmission with gearshift paddles
Balanced 50/50 weight distribution
Double joint spring strut front axle
Drive experience mode switch - Comfort mode, ECO PRO mode and SPORT mode
Electronic differential lock control (EDLC)
Low centre of gravity
Petrol Particulate Filter
Stroke dependent dampers

Entertainment

DAB tuner
Personal eSim

Exterior Features

Acoustic glazing
Automatic headlight beam throw control with load dependent regulating reaction, dynamic compensation of braking dive and acceleration squat
Automatic windscreen wipers and automatic headlight
BMW radiator grille with mesh grille, end face of the nuggets in aluminium matt and frame in chrome matt
Body colour fuel filler flap
Body colour roof fin
Bonnet and tailgate badge
Electric folding wing mirrors - Driver side electrochromic, auto anti dazzle function & front passenger side auto parking function without anti dazzle
Electric windows - front and rear, with open/close fingertip control, anti trap facility and comfort closing function all round
Follow me home headlights
Front and rear bumper system
Front apron plastic in body colour
Green tinted heat protection glazing
Illuminated bow type door handles in body colour drivers side with door lock
Interior rear view electrochromatic mirror with automatic anti dazzle function
LED 3rd brake light
LED daytime running lights
LED front fog lights
LED front indicators
Licence plate panel integrated into front bumper and tailgate
M designation on front side panels, left and right
M Sport entry door sill strips
One piece front bumper cover including towing eye cover in body colour
Preparation for high beam assistant
Rear side wing doors
Rear wiper
Reversing light
Side frame trim strip black matt
Two part LED tailights in L-shape with components in smoked glass, brake light, LED turn indicator and rear fog light
Visible exhaust tailpipe finisher
Visible VIN plate
Welcome lights in interior and door handle area
Widened track and increased camber values for max transverse dynamics, agility and steering precision
Windscreen washer jets concealed underneath bonnet

Interior Features

12V power socket in front centre console
2 front cupholder in centre console with clamping elements and matt black inlay
3 rear headrests
3 seat bench in 2nd row
3 spoke flat bottom M sport leather multifunction steering wheel
3 zone automatic air conditioning
4 pieces lashing eyelets in luggage compartment
40:20:40 split folding rear seat, folding head restraint of centre seat and rear centre armrest with two cupholders
Anthracite headlining
Armrest integrated in front and rear door trim + front centre console armrest
Battery in luggage compartment
BMW ID
Extended storage - 2x Dual USB Type C 3A charging function in the rear centre console for the rear
Extended storage - Luggage compartment partition net on left side trim panel, Bag hook on both sides of the luggage compartment
Extended storage - Multifunction hook
Extended storage - Trailer tow hitch button in black (extendable trailer tow hitch) on the right hand side
Four grab handles integrated in roof lining
Front and rear door pockets
Front footwell lights
Heated driver and front passenger seats
Height adjustable front headrests
Illuminated armrest storage compartment
Illuminated glove compartment with separate small compartment
Interior light and front reading light
Luggage compartment light
Single front passenger seat
Steering column adjustment - Infinitely variable in height and length
Sunvisors with illuminated vanity mirrors and ticket pocket
Through load system
Toolkit located in luggage compartment
Velour front floor mats

Packs

Ambient lighting pack - 4 Series
BMW Live Cockpit Plus pack - 4 Series
Connected professional package - 4 Series
M High gloss shadowline exterior trim pack - 4 Series
M sport exterior styling pack - 4 Series
Park assist pack - 4 Series

Passive Safety

3 point seatbelts on all seats
BMW emergency call
Brake energy regeneration
Braking pre-tensioning
Child locks
Child seat ISOFIX attachment for the two outer rear seats
Crash sensor activating of airbags, Unlocking doors, hazard warning lights, interior light, safety battery terminal
Driver and front passenger side airbags, integrated in the door side seat backrest bolsters for all seat variants
Driver/Front Passenger airbags
Dry braking
Dynamic brake control
Dynamic stability control + (DSC+) - Anti-lock Braking System (ABS) with brake assist and cornering brake control + Automatic Stability Control (ASC)
Dynamic Traction Control - DTC
Electric parking brake including automatic hold function and automatic release of the parking brake when driving off
Front and rear ventilated brake disc
Front passenger manual airbag deactivation
Head airbags for all 4 outer seats
Hill start assistant
Seat belt security check for driver and front passenger
Seat belt with belt stopper, pyrotechnic belt tensioners and belt force limiters
Seat occupancy detection for driver and passenger side
Side impact protection
Tyre pressure sensors
Warning triangle and first aid kit

Security

Alarm system for monitoring doors, engine compartment,interior movement sensor,tilt sensor and siren with emergency power supply
Centre lock switch - Button in driver's side front door, complete locking of car
Closing system with centre locking for all doors, fuel filler flap&tailgate, auto lock after pulling away, incl. 2 remote controls with integrated key
Electronic vehicle immobiliser
Locking wheel bolts
Vehicle key with M specific designation

Wheels

Tyre repair kit plus

Emissions - ICE

CO	0.255
HC	0.017
Noise Level dB(A)	67
NOx	0.014
Particles	0.0003
Standard Emissions	EURO 6
WLTP - CO2 (g/km) - Comb	153
WLTP - CO2 (g/km) - Comb - TEH	158
WLTP - CO2 (g/km) - Comb - TEL	152
WLTP - CO2 (g/km) - Extra High	147
WLTP - CO2 (g/km) - High	131
WLTP - CO2 (g/km) - Low	215
WLTP - CO2 (g/km) - Medium	152

Emissions - Lifecycle

End-of-Life Emissions - CO2e (Equivalent) - tonnes	0.6
In-Life Emissions - CO2e (Equivalent) - tonnes	11.1
Lifetime Emissions - CO2e (Equivalent) - tonnes	26.3
Production Emissions - CO2e (Equivalent) - tonnes	14.6

Engine and Drive Train

Catalytic Convertor	Yes
Engine capacity (cc)	1998
Compression Ratio	11.0:1
Cylinder Layout	IN-LINE
Cylinders	4
Cylinders - Bore (mm)	82
Cylinders - Stroke (mm)	94.6
Engine Layout	NORTH SOUTH
Gears	8 SPEED
Number of Valves	16
Transmission	SEMI-AUTO

Fuel Consumption - ICE

WLTP - MPG - Comb	42.2
WLTP - MPG - Comb - TEH	40.4
WLTP - MPG - Comb - TEL	42.2
WLTP - MPG - Extra High	43.5
WLTP - MPG - High	48.7
WLTP - MPG - Low	29.7
WLTP - MPG - Medium	42.2

General

Generation Mark	2
Insurance Group 1 - 50 Effective January 07	29E
Service Interval Frequency - Months	24
Service Interval Mileage	18000
Standard manufacturers warranty - Mileage	Unlimited
Standard manufacturers warranty - Years	3
Vehicle Homologation Class	M1

Performance

0 to 62 mph (secs)	7.9
Engine Power - BHP	184
Engine Power - RPM	5000
Engine Torque - NM	300
Engine Torque - RPM	1350
Top Speed	146 mph

Test Cycles

RDE Certification Level

RDE 2

Tyres

Space Saver?	No
Tyre Size Front	245/45 R18
Tyre Size Rear	245/45 R18
Tyre Size Spare	TYRE REPAIR KIT
Wheel Style	AERODYNAMIC STYLE 858 M
Wheel Type	18" ALLOY

Vehicle Dimensions

Height	1442 mm
Length	4783 mm
Wheelbase	2856 mm
Width	1852 mm
Width (including mirrors)	2073 mm

Weight and Capacities

Fuel Tank Capacity (Litres)	59
Gross Vehicle Weight	2175 kg
Luggage Capacity (Seats Down)	1290 l
Luggage Capacity (Seats Up)	470 l
Max. Loading Weight	555 kg
Max. Roof Load	75
Max. Towing Weight - Braked	1600
Max. Towing Weight - Unbraked	750
Minimum Kerbweight	1620 kg
No. of Seats	5
Turning Circle - Kerb to Kerb	12 m

Cars

Have you considered?

.imgHideOnJavaScriptDisabled_40599v15mub9y1th { display: none !important; }

Mercedes C-Class review

In-depth reviews

8 Oct 2025

.imgHideOnJavaScriptDisabled_40599v15mub9y1ti { display: none !important; }

Used Mercedes C-Class (Mk5, 2021-date) buyer’s guide: an expensive but desirable exec

Used car tests

14 Mar 2025

.imgHideOnJavaScriptDisabled_40599v15mub9y1tj { display: none !important; }

BMW 4 Series Gran Coupe review

In-depth reviews

12 Nov 2024

Most Popular

Range Rover Evoque P300e Autobiography - full width front

.imgHideOnJavaScriptDisabled_40599v15mub9y1tk { display: none !important; }

Car Deal of the Day: A fully-loaded Range Rover Evoque is now just £455 a month

Not often do we feature a Range Rover, but today is an exception. The top-spec Evoque is our Deal of the Day for 18 September.

News

18 Sep 2026

.imgHideOnJavaScriptDisabled_40599v15mub9y1tl { display: none !important; }

Volkswagen ID. Buzz sets a massive EV distance record

Setting the record for ‘most countries visited in a continuous journey in an EV’, the Buzz covered almost 62,000 miles in 445 days.

News

18 Sep 2026

.imgHideOnJavaScriptDisabled_40599v15mub9y1tm { display: none !important; }

Range Rover Electric and Dacia Spring are EV extremes but I've found the sweet spot

Mike Rutherford believes he's figured out the trick to getting the best EV bargain

Opinion

20 Sep 2026

BMW 4 Series Gran Coupe 420i M Sport 5dr Step Auto

Summary

Equipment

Driver Convenience

Engine/Drivetrain/Suspension

Entertainment

Exterior Features

Interior Features

Packs

Passive Safety

Security

Wheels

Technical

Emissions - ICE

Emissions - Lifecycle

Engine and Drive Train

Fuel Consumption - ICE

General

Performance

Test Cycles

Tyres

Vehicle Dimensions

Weight and Capacities

Have you considered?

Mercedes C-Class review

Used Mercedes C-Class (Mk5, 2021-date) buyer’s guide: an expensive but desirable exec

BMW 4 Series Gran Coupe review

Most Popular