BMW

BMW 4 SERIES CONVERTIBLE 420i M Sport 2dr Step Auto [Pro Pack]

Fuel

FuelPetrol

Transmission

TransmissionAutomatic

Acceleration

0 - 62 mph8.2s

WLTP - CO2 (g/km)

WLTP - CO2154 g/km

BMW's second generation 4 Series Convertible switches to a fabric-folding roof and so can now offer a more credible alternative option to executive segment mid-sized cabriolet buyers not already swayed by the competing charms of rival open-topped versions of the Audi A5 and Mercedes C-Class. You won't get the large boot and cutting-edge driving dynamics of the 4 Series Coupe, but compensations come in the form of refinement, security and drop-top desirability. You'd like one.

THE DEUTSCHLAND OPEN

BMW's 4 Series Convertible has more individual appeal in second generation form. Jonathan Crouch takes a look.

Ten Second Review

BMW's second generation 4 Series Convertible switches to a fabric-folding roof and so can now offer a more credible alternative option to executive segment mid-sized cabriolet buyers not already swayed by the competing charms of rival open-topped versions of the Audi A5 and Mercedes C-Class. You won't get the large boot and cutting-edge driving dynamics of the 4 Series Coupe, but compensations come in the form of refinement, security and drop-top desirability. You'd like one.

Background

Sharper than its predecessor and echoing the bold style of its 4 Series Coupe showroom stablemate, BMW's second generation 4 Series Convertible aims to blend sporting driving pleasure and open-air thrills to continue the 35-year legacy in this model class that began with the Munich maker's first 3 Series Convertible. As before, it sizes up to the same two segment arch-rivals, Audi's A5 Convertible and the Mercedes C-Class Cabriolet - and does so now more directly thanks to the adoption of a fabric roof. And plenty of changes under the skin aim to make it a bit more of a driver's car than before.

Driving Experience

BMW has worked hard to ensure that this 4 Series Convertible's handling is as close to that of the equivalent Coupe as possible, using extra bracing and special panels to improve body rigidity, which the company says is 4% better than the previous generation metal-topped model. As usual with this model range, there's rear wheel drive and xDrive 4WD for the fastest models (though this AWD system isn't available with lesser engines as it is on the Coupe). Plus there's a freshly developed double-jointed spring-strut front suspension and a 5-link rear axle. Engine-wise, the key news is introduction of 48V mild hybrid tech for the 2.0-litre 184hp diesel engine in the volume 420d. The same mild hybrid tech also features with the six cylinder diesels, the 430d (286hp) and the M440d (340hp). And it's on the quickest mainstream conventional petrol variant too, the six cylinder 374hp M440i xDrive, which features BMW's Sport differential, with electronically-controlled, fully-variable locking function in the rear differential, all of this helping to get the power down through the turns, should you want to drive this car in the kind of enthusiastic manner a likely owner hardly ever would. If you do want the ultimate fast version of this car, you'll be directed to the top M4 Competition M xDrive Convertible model, which has 510hp and gets to 62mph in just 3.7s. Toupees will need to be very firmly tied down. Back in the real world, two conventional 2.0-litre petrol turbo 4 Series Convertible models also feature, the 420i (184hp) and the 430i (258hp). All the engines link up as standard with eight-speed Steptronic auto transmission, which can now be specified with a new optional Sprint function.

Design and Build

No doubt about the main talking point here. The rather inevitable switch from the previous model's metal hard top roof to the same kind of folding fabric top that rivals Audi and Mercedes offer. That means a 40% reduction in roof weight from a soft top that uses panel bow elements and a glass rear window for optimum acoustic and thermal comfort. The electric folding roof takes 18 seconds to open or close and can be used at speeds of up to 31mph. Otherwise, as with the Coupe version of this model, the key change is the adoption of a more vertical upright kidney grille, intended to reference classic BMWs like the pre-war 328 sports car. It's a move that's evoked a mixed reaction from brand loyalists, but as Design chief Domagoj Dukec points out, until the 1980s, the grille is on BMWs were always more vertical than horizontal. Inside, the cabin follows some of the latest BMW design trends, with a revised dash layout including a smarter drive selector and a start button in the centre console. The 'BMW Live Cockpit Professional' dash set-up is standard, offering a fully digital screen layout that gives you a high-resolution 12.3-inch instrument cluster behind the steering wheel and a 10.25-inch iDrive infotainment Central Control Display. There are also re-designed sports seats and the option of a re-designed head-up display. As before, this is billed as a 'proper four-seater', though the rear seat isn't as comfortable as in the Coupe. Predictably, there's not as much boot space either, the Coupe variant's 440-litre capacity figure falling to 385-litres with the roof closed and 300-litres with the top down.

Market and Model

Sporty 'M Sport' trim is standardised this time round and prices start from around £46,000 for the entry-level 420i, which means a big price premium of almost £6,000 over the equivalent Coupe model. There's a further premium of around £2,200 if you want the 420d diesel version. You're looking at around £50,000 for a 430i. And think in terms of around £60,000 if you want the M440i xDrive model. The top M4 Competition Convertible M xDrive model is around £82,000. Across the range as an option, there's an 'M Sport Pro' package which includes a special 'Sprint' function for additional bursts of speed and a sporty engine soundtrack in the cabin when the 'SPORT' driving mode is activated. Plus you get M sport brakes, 19-inch 'M light' alloy wheels, a rear spoiler in a high-gloss black, BMW individual high-gloss 'Shadowline' trim with extended features and BMW individual lights and M seat belts. You might also be interested in a browse through the M Performance Parts portfolio, from which you can order things like 20-inch M Performance forged light alloy wheels in a Y-spoke design with a Jet Black matt finish. Or maybe a carbon fibre finish for the front grille, front splitter and side skirts, as well as aero flicks for the front apron in high-gloss black.

Cost of Ownership

Mild hybrid technology has been included with all diesel engines and with the straight-six petrol unit of the flagship BMW M440i xDrive Convertible. Fitting a 48V starter-generator and second battery greatly increases the scope for utilising Brake Energy Regeneration and the electrical power it produces. The recuperated energy collected by the 48V battery can be supplied to the 12V electrical system or used for generating additional drive power when fed back to the 48V starter-generator. When the car is accelerating, the generator is also able to offer the driver an electric boost effect that instantly makes an extra 11hp available. All of which should promise a very competitive set of efficiency stats. Let's see. We'll start with the petrol models. The 420i manages up to 49.6mpg on the combined cycle and up to 131g/km of CO2. For the 430i version, the figures are up to 47.1mpg and up to 138g/km. For the M440i xDrive, the figures are up to 40.9mpg and up to 159g/km. What about the diesels? For the 420d, the official figures are up 67.3mpg and up to 111g/km. For the 430d, it's up to 50.4mpg and up to 147g/km. For the M440d xDrive, it's up to 44.8mpg and 165g/km. Finally for the M4 version, it's 27.7mpg and 231g/km.

Summary

Like many of its owners will be, BMW is quietly satisfied with this 4 Series Convertible. Would this car be a more engaging driving machine without the extra weight of its roof mechanicals? The extra sharpness of its 4 Series Coupe stablemate certainly suggests that. I sense though, that most buyers of this open-topped version will be quite happy with a more relaxed, comfortable demeanour. That is, after all, as much as competitors from Audi and Mercedes offer - and those brands can't deliver the engine choice BMW provides here. In fact, a lot of boxes are ticked by this car if you can afford its asking price. You get impressive safety systems, high residual values, above average rear seat legroom and a sheer depth of engineering that rarely fails to impress. As a result, in many ways, it's probably the most complete contender in this segment and, best of all, it looks as striking and expensive as a convertible of this kind should when the sun's out and all is right with the world. True, there are probably all kinds of ways of more sensibly spending the budget required for one of these. You know what though? Right here, right now, I can't really think of any....

  • Rain sensor
  • Acoustic glazing
  • Windscreen wipers with integrated washing jets
  • Green tinted heat protection glazing
  • Electric windows - front and rear, with open/close fingertip control, anti trap facility and comfort closing function all round

  • Hill start assistant
  • Dry braking
  • Electromechanical parking brake including automatic hold function and automatic release of the parking brake when pulling away
  • Coasting in idle in ECO PRO mode
  • Dynamic stability control + (DSC+) - Anti-lock Braking System (ABS) with brake assist and cornering brake control + Automatic Stability Control (ASC)
  • Electronic differential lock control (EDLC)
  • Front and rear ventilated brake disc
  • CBC - (Cornering brake control)
  • Dynamic brake control
  • Dynamic Traction Control - DTC
  • Brake energy regeneration
  • Braking pre-tensioning

  • Velour front floor mats

  • Low centre of gravity
  • Sprint mode
  • Stroke dependent dampers
  • Drive performance control - ECO PRO, comfort and sport modes
  • Adaptive M suspension

  • Variable sport steering
  • Active guard plus
  • Attentiveness assist
  • Cruise control with brake function
  • Electric power steering
  • Servotronic steering optimised at all speed ranges

  • Auto start-stop

  • Condition based service
  • Oil sensor for level and grade, warning by check control system
  • Personal Profile - automatic lock when driving away selectable
  • On board computer - average speed, fuel consumption, outside temp display with acoustic warning, clock/date, service interval, odometer/trip meter
  • BMW ConnectedDrive online services
  • BMW service history
  • Integrated owners handbook
  • Gearshift time display in manual mode
  • BMW Live Cockpit Professional Nav with 12.3" instrument display + 10.25" display, Intelligent Voice Assist, BMW OS 7, HDD, 2USB, 4G LTE connect
  • iDrive controller on centre console
  • BMW emergency call
  • BMW Teleservices
  • Instrument cluster with speedometer with mph readout, tachometer, fuel gauge and oil temperature gauge
  • Optimum shift indicator
  • Check Control warning system for monitoring of lights and door/luggage compartment open warning
  • Brake pad wear indicator in front and rear

  • Interior rear view mirror with automatic anti dazzle function
  • Exterior mirrors - electrically folding with anti-dazzle
  • Automatically dimming electrochromatic rear view mirror

  • Sensatec instrument panel

  • Petrol Particulate Filter
  • High precision injection
  • Double VANOS
  • VALVETRONIC engine management
  • Balanced 50/50 weight distribution

  • Electronic service booklet
  • Enhanced Active Sound Design
  • DAB tuner

  • Brushed aluminium inserts in the front door sill finishers with BMW designation
  • BMW Individual high gloss shadow line with extended contents
  • Model designation on right side of tailgate
  • Front and rear bumper system
  • Lightweight engineering
  • Visible VIN plate
  • M rear spoiler
  • Body colour fuel filler flap
  • BMW emblem on engine compartment lid and tailgate
  • Illuminated bow type door handles in body colour drivers side with door lock
  • Side frame decorative moulding black matt
  • Window recess cover black high gloss
  • Front apron plastic in body colour
  • One piece front bumper cover including towing eye cover in body colour
  • Licence plate panel integrated into front bumper and tailgate
  • BMW kidney grille with mesh grille front side of the nuggets in matt aluminium and frame in chrome high gloss
  • BMW individual lights shadow line
  • Body colour roof fin
  • Widened track and increased camber values for max transverse dynamics, agility and steering precision
  • Fading support
  • Exhaust tailpipe - split left and right
  • M designation on front side panels, left and right

  • Welcome lights in interior and door handle area
  • Preparation for high beam assistant
  • LED Headlights
  • Dynamic brake lights
  • LED front fog lights
  • Automatic headlight beam throw control with load dependent regulating reaction, dynamic compensation of braking dive and acceleration squat
  • Two part LED tailights in L-shape with components in smoked glass, brake light, LED turn indicator and rear fog light

  • 3 zone automatic air conditioning

  • Glove compartment lighting
  • 12V power socket in front centre console
  • 3 spoke M leather multifunction steering wheel
  • Gear selection lever with M-specific designation
  • Illuminated glove compartment with separate small compartment
  • 4 pieces lashing eyelets in luggage compartment
  • Armrest integrated in front and rear door trim + front centre console armrest
  • Height adjustable mechanically and infinitely variable steering column
  • 2 front cupholder in centre console with clamping elements and matt black inlay
  • Four grab handles integrated in roof lining
  • Vernasca leather upholstery
  • Storage compartment in rear centre console
  • Toolkit located in luggage compartment
  • Front and rear door pockets

  • Make-up mirror lights
  • Front and rear reading lights
  • Front and rear footwell lights
  • Luggage compartment light
  • Ambient lighting with welcome light carpet
  • Illuminated armrest storage compartment
  • Front and rear door exit lighting (left / right)

  • M Aerodynamics pack - 4 Series
  • Connected professional pack - 4 Series

  • Seat belt with belt stopper, pyrotechnic belt tensioners and belt force limiters
  • Child seat ISOFIX attachment for the two outer rear seats
  • Crash sensor activating of airbags,Unlocking doors,hazard warning lights,fuel cut off,interior lighting+activation of safety battery terminal clamp
  • Driver and front passenger side airbags, integrated in the door side seat backrest bolsters for all seat variants
  • Head airbags for all 4 outer seats
  • Seat belt security check for driver and front passenger
  • Child proof locking system in rear door
  • Front passenger manual airbag deactivation
  • Battery safety cut-off
  • Tyre pressure monitoring with three level warning strategy
  • 2 x 3-point rear seat belts
  • M Seatbelts
  • Side impact protection
  • Warning triangle and first aid kit
  • Driver/Front Passenger airbags

  • Front headrests
  • Front sports seats
  • Electric seat adjustment with memory
  • Heated driver and front passenger seats
  • 2 Rear seat headrests
  • Front seat backrest width adjustment
  • 40:20:40 split folding rear seat and rear centre armrest with two cupholders

  • Vehicle key with M specific designation
  • Remote control with integrated key one button open/close vehicle and windows, sole opening of the luggage compartment lid, panic mode and glass roof
  • Start/stop button with Comfort Go keyless engine start and auto Start/stop deactivation button
  • Alarm system (Thatcham 1) with remote control and electronic engine immobiliser
  • Central locking switch for all doors, fuel filler cap and luggage compartment

  • 8 speed automatic steptronic transmission

  • Sunvisors with vanity mirrors and ticket pocket

  • Reduced rolling resistance tyres

  • 19" M light double spoke bicolour jet black alloy wheels - Style 797M with mixed tyres and run flat tyres

  • WLTP - CO2 (g/km) - Low: 217
  • WLTP - CO2 (g/km) - Medium: 162
  • WLTP - CO2 (g/km) - High: 138
  • WLTP - CO2 (g/km) - Extra High: 156
  • WLTP - CO2 (g/km) - Comb: 160
  • WLTP - CO2 (g/km) - Low - Min: 212
  • WLTP - CO2 (g/km) - Low - Max: 219
  • WLTP - CO2 (g/km) - Medium - Min: 156
  • WLTP - CO2 (g/km) - Medium - Max: 164
  • WLTP - CO2 (g/km) - High - Min: 133
  • WLTP - CO2 (g/km) - High - Max: 139
  • WLTP - CO2 (g/km) - Extra High - Min: 150
  • WLTP - CO2 (g/km) - Extra High - Max: 158
  • WLTP - CO2 (g/km) - Comb - Max: 161
  • WLTP - CO2 (g/km) - Comb - Min: 154
  • Standard Euro Emissions: EURO 6
  • HC+NOx: N
  • Particles: N

  • Cylinders: 4
  • Cylinder Layout: IN-LINE
  • Number of Valves: 16
  • Camshaft: DOHC
  • Fuel Delivery: TURBO INJECTION
  • Catalytic Convertor: True
  • Engine Layout: NORTH SOUTH
  • Compression Ratio: 11.0:1
  • Transmission: SEMI-AUTO
  • Gears: 8 SPEED
  • Engine Code: B48B20M1
  • Cylinders - Bore (mm): 82
  • Cylinders - Stroke (mm): 94.6
  • CC: 1998

  • EC Directive 1999/100/EC Applies: False
  • WLTP - MPG - Low: 29.7
  • WLTP - MPG - Medium: 39.8
  • WLTP - MPG - High: 46.3
  • WLTP - MPG - Extra High: 40.9
  • WLTP - MPG - Comb: 40.4
  • WLTP - MPG - Low - Min: 30.4
  • WLTP - MPG - Low - Max: 29.4
  • WLTP - MPG - Medium - Min: 40.9
  • WLTP - MPG - Medium - Max: 39.2
  • WLTP - MPG - High - Min: 48.7
  • WLTP - MPG - High - Max: 46.3
  • WLTP - MPG - Extra High - Min: 42.8
  • WLTP - MPG - Extra High - Max: 40.9
  • WLTP - MPG - Comb - Min: 41.5
  • WLTP - MPG - Comb - Max: 39.8
  • WLTP - FC (l/100km) - Low: 9.5
  • WLTP - FC (l/100km) - Medium: 7.1
  • WLTP - FC (l/100km) - High: 6.1
  • WLTP - FC (l/100km) - Extra High: 6.9
  • WLTP - FC (l/100km) - Comb: 7
  • WLTP - FC (l/100km) - Low - Min: 9.3
  • WLTP - FC (l/100km) - Low - Max: 9.6
  • WLTP - FC (l/100km) - Medium - Min: 6.9
  • WLTP - FC (l/100km) - Medium - Max: 7.2
  • WLTP - FC (l/100km) - High - Min: 5.8
  • WLTP - FC (l/100km) - High - Max: 6.1
  • WLTP - FC (l/100km) - Extra High - Min: 6.6
  • WLTP - FC (l/100km) - Extra High - Max: 6.9
  • WLTP - FC (l/100km) - Comb - Min: 6.8
  • WLTP - FC (l/100km) - Comb - Max: 7.1

  • Generation Mark: 2
  • Timing Belt Interval Mileage: N
  • Timing Belt Interval Frequency - Months: N
  • NCAP Adult Occupant Protection %: N
  • NCAP Child Occupant Protection %: N
  • NCAP Pedestrian Protection %: N
  • NCAP Safety Assist %: N
  • NCAP Overall Rating - Effective February 09: N
  • Badge Power: 184
  • Badge Engine CC: 2.0
  • Vehicle Homologation Class: M1
  • Special Edition: False
  • Special Order: False
  • Based On ID: N
  • Insurance Group 1 - 50 Effective January 07: 37E
  • Did at least one aspect of this vehicle's safety give cause for concern?: False
  • Coin Series: M Sport [Pro pk]
  • Coin Description: i

  • Engine Power - BHP: 184
  • Engine Power - PS: True
  • 0 to 60 mph (secs): False
  • 0 to 62 mph (secs): 8.2
  • Top Speed: 147
  • Engine Power - KW: 135
  • Engine Power - RPM: 5000
  • Engine Torque - LBS.FT: 221
  • Engine Torque - NM: 300
  • Engine Torque - RPM: 1350
  • Engine Torque - MKG: 30.6

  • Emissions Test Cycle: WLTP
  • RDE Certification Level: RDE 2

  • Tyre Size Rear: 255/35 R19
  • Tyre Size Spare: RUN FLAT TYRES
  • Wheel Type: 19" ALLOY
  • Tyre Size Front: 225/40 R19
  • Alloys?: True
  • Space Saver?: False
  • Wheel Style: DOUBLE SPOKE STYLE 797M

  • Width (including mirrors): 2081
  • Height: 1384
  • Height (including roof rails): N
  • Length: 4768
  • Width: 1852
  • Wheelbase: 2851

  • Minimum Kerbweight: 1690
  • Gross Vehicle Weight: 2185
  • Fuel Tank Capacity (Litres): 59
  • Luggage Capacity (Seats Up): 385
  • No. of Seats: 4
  • Max. Towing Weight - Braked: 1600
  • Max. Towing Weight - Unbraked: 750
  • Max. Loading Weight: 495
  • Max. Roof Load: N
  • Luggage Capacity (Seats Down): N
  • Turning Circle - Kerb to Kerb: 11.4

  • M Sport brake in high gloss blue painted brake callipers with M designation: Included
  • M Sport brake in high gloss red painted brake callipers with M designation: £300

  • Enhanced bluetooth with wireless charging: £350
  • Bluetooth hands free facility with USB audio interface with audio streaming: Included

  • Wifi hotspot preparation: £0

  • Aluminium tetragon interior trim: Included
  • BMW Individual piano black trim: £500
  • Mesh effect aluminium interior trim: £0

  • Stereo speaker system with 2 mid range speakers in the front door trims and rear parcel shelf + 2 central bass speakers underneath the front seats: Included
  • Harman/Kardon loud speaker system: £820

  • Retractable hard top: Included
  • Metallic paint: £670
  • Wind deflector: £350
  • Solid paint: Included

  • High beam assistant: £0
  • BMW Laserlights: £0

  • Air collar: £500

  • Soft top - Anthracite: £270

  • Heating steering wheel: £170

  • Park assist plus pack - 4 Series: £650
  • Extended storage pack - 4 Series: £0
  • Park assist pack - 4 Series: Included
  • Visibility pack - 4 Series: £1,500
  • Comfort pack - 4 Series Convertible: £1,350

  • Metallic - Sanremo green: £670
  • Metallic - Artic race blue: £670
  • Metallic - Portimao blue: £670
  • Metallic - Mineral white: £670
  • Metallic - Black sapphire: £670

  • Solid - Alpine white: £0

  • Driver and front passenger lumbar support: £265

  • Comfort access system with smart opener: £0

  • Fully electric towbar: £850

  • Vernasca leather - Black with blue contrast stitching: £0
  • Vernasca leather - Black with grey stitching: £0
  • Vernasca leather - Cognac with mokka stitching: £0
  • Vernasca leather - Oyster with grey stitching: £0
  • Vernasca leather - Tacora red with black stitching: £0

Whilst every effort is made to verify and ensure the accuracy of the data, the information should only be used as a guide and no purchasing decision should be made without verification of the data from either the manufacturer or franchised dealer. Our offers may be on a different model year to that represented by this data and so specification may differ accordingly.

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