BMW 228i vs BMW 428i

What's the difference?

The BMW 2 Series coupes and convertibles combine understated good looks with great dynamics and top-shelf quality. Extra equipment, especially the iDrive6 multimedia system, has brought it up to speed in terms of tech and value, while the M240i sets the compact performance benchmark. And if you really want to push the envelope, the M2 is right there at the top of the under $100k performance pyramid.

The 4 Series line offers three distinct points of difference from the more traditional 3 Series, each with their own attraction. The sharpening of the sticker prices and the additional spec helps their cause as well, with the 430i Coupe probably our pick of the range. The 440i is the firecracker of the group, while the 420d is also worth a look, thanks to its value and prodigious torque output.

The biggest visual clue to the revised 2 Series is the circular design bi-LED headlights, now standard on the 2 Series entry 220i, and mid-range 230i models, while hexagonal adaptive LEDs are standard on the top-shelf M240i.

But BMW couldn't leave those little light-emitting diodes alone, with LED front fog lights joining one-piece L-shaped LED tail-lights across the range.

Luxury Line-equipped cars feature a subtly revised nose treatment with larger intakes and a reshaped 'kidney' grille. There are also four new alloy wheel designs – a 17-inch alloy fitted standard to the 220i Luxury Line, and three optional M alloys for M Sport models (all no-cost options on the M240i).

The 230i M Sport features black, high-gloss bars in its kidney grille, as well as a black chrome finish for the exhaust finishers.

On the inside, there's the addition of a 'Black Panel' digital instrument cluster, which remains matt with the ignition off, and lights up with sharp graphics, configurable across conventional speed and rev readouts, as well as gear position, engine-efficiency data, vehicle settings and nav guidance.

There are also high-gloss finishes across the centre stack and front console, and even greater attention to detail around panel joins, trim stitching and switchgear.

But the hero is the latest iDrive6 multimedia system, run through an 8.8-inch colour touchscreen (6.5-inch on 220i), providing access to live content, radio and audio, navigation and maps, phone functionality, and vehicle settings through a simple and customisable app-style interface. The iPhone really as inspired car companies.

The M2 boasts M-specific instrument display content and a go-fast red needle on the tachometer.

No external changes to the 4 Series' bodywork have been affected  for  this midlife refresh, but there have been plenty of tweaks to the standard equipment offerings right across the board.

Surprisingly, at a little over 4.4 metres long, the 2 Series (Coupe) is around 10cm longer than its 1 Series hatch stablemate (M240i +15cm), but aligns with its just under 1.8m width, and 1.4m height.

It seats four, with plenty of room up front and multiple storage options, including two cupholders in the console with an oddments tray behind, a 12-volt outlet, a lidded storage box between the seats with USB connection, a reasonably sized glove box, and segmented bins in the doors big enough for large water bottles.

While it was coupes only on the launch drive, we know the convertible has a pair of cupholders in the back, but not so in the coupe, and while headroom in the soft-top is okay (especially with the roof down) it's a squeeze in the hardtop.

More a 2+2 than a full four-seater, getting into the rear is an athletic exercise, and once installed, leg and headroom for this 183cm tester is tight. That said, kids up to teenager-size would be fine.

Boot volume is 390 litres (a 3 Series Coupe is 480 litres), with run-flat tyres on the 220i and 230i meaning there's no spare (or repair kit) under the floor, but the performance-focused M240i and M2, pack a 'BMW Mobility Kit' (compressor and tyre sealant to cover minor damage) in line with their high-performance (non-run-flat rubber).

A 60/40 split-folding rear backrest liberates extra load space, and a 'Through Loading System' with luggage compartment dividing net, and 40/20/40 split-folding rear seat is optionally available (220i & M2 Pure - $350 / 230i - $385 / M240i & M2 - $500).

And if you're keen on towing the 220i can pull 680kg of unbraked trailer, and 1500kg braked, with the minimum number stepping up to 715kg for the 230i. The M240i and M2 are no-tow zones.

Two-doors are never the most practical devices, but the 4 Series Coupe and Convertible duo make a decent fist of it for front-seat passengers. There are bottle holders in both doors and a pair of cupholders in the centre console, along with a large lockable glovebox.

The centre bin is, however, quite shallow, and houses the car's single USB port inside it. There is covered storage under the dash for smaller items, and a small rubber-lined tray that the current crop of phones has outgrown.

The rear seating in the Coupe is reduced to almost a formality, especially if the front seat passengers are tall and the front seats are set back, while the sloping roofline reduces head space quite considerably. A centre armrest contains a pair of cupholders, and there are small side pockets.

Rainy conditions precluded us from trying the Convertible's metal folding roof, but the rear seat space restrictions also apply here. Its 370 litres of boot space is roomy enough for a drop-top, while a clever lifting function raises the folding roof structure up by about 300mm to allow luggage to be stowed under the panels when the roof is down. Capacity drops, though, to just 230 litres.

The Gran Coupe, on the other hand, is the most practical car in the entire 3 and 4 Series line-up outside of the 3 Series Touring wagon. With a large, flat load area, and a hatch-like tailgate, the Gran Coupe can swallow 480 litres of gear with the seats up and an impressive 1300 litres with the seats lowered.

Face-level rear vents, more head and backseat legroom – not to mention the fact you don't have to squeeze into the rear past the front seat – makes the Gran Coupe a most useful device, and it's little wonder it's the most popular variant of the three.

Entry into the 4 Series world now stands at $68,900 plus on-roads for the petrol 420i Coupe and Gran Coupe, and tops out at almost $118,000 for the 440i Convertible.

Both the 420i and 420d have been boosted by the addition of adaptive M dampers, a heads-up display, powered folding rear-view mirrors, lane-change warning, driving assistant and BMW's surround view camera with top and side views.

BMW claims the extra kit is worth just over $8000. Leather seats, sat nav, BMW's ConnectedDrive Emergency call system, bi-Xenon headlights and reversing camera are also featured. An eight-speed automatic transmission is offered as stock, but a six-speed manual can be optioned at no cost.

The diesel version costs an additional $2200 over the petrol powerplant.

Stepping into the 430i, the M Sport Package is offered as standard, with the Luxury line, which includes a leather-trimmed dash, a no-cost option.

Additional standard equipment over the outgoing 428i includes 19-inch M rims, heads-up display, lane change warning, driving assistant and surround view camera. The 430i also gains electric lumbar support for driver and front passenger seats and a nine-speaker stereo system over the base 420i.

Finally, the range-topping 440i scores a heads-up display, lane change warning, driving assistant, surround view camera, adaptive LED headlights, leather dash, front seat heating, high beam assist, active cruise control with stop and go function and parking assistant over the outgoing 435i.

Over the 430i, the 440i also gets variable sport steering, a Harman/Kardon surround sound system with 16 speakers, a leather instrument panel (with M Sport Package), ConnectedDrive internet and concierge service, and air collar neck-warming ducts for the 440i Convertible.

The 220i is powered by a 2.0-litre 'TwinScroll' turbo-petrol four, featuring 'Valvetronic' variable valve control and 'Double-VANOS' variable camshaft control, and developing 135kW at 5000rpm, and 270Nm between 1350-4600rpm.

Using a retuned version of the same engine (lower compression ratio, more turbo boost), the 230i pumps out a solid 185kW at 5200rpm, and a grunty 350Nm from just 1450-4800rpm.

The same (8HP50) eight-speed auto transmission is used across the board, pushing drive to the rear wheels only.

Then, the M240i is powered by a 3.0-litre, six-cylinder, turbo-petrol, pushing out no less than 250kW at 5500rpm, and a thumping 500Nm between 1520-4500rpm.

The same (8HP50) eight-speed auto transmission is used across the board, pushing drive to the rear wheels only, and happily, a six-speed manual gearbox is a no-cost option on the M240i.

The full-house M2's 3.0-litre turbo six produces 272kW at 6500rpm, and 465Nm from just 1400-5650rpm (500Nm from 1450-4750rpm on overboost), driving the rear wheels through a seven-speed dual-clutch auto, although a six speed-manual is a no-cost option (and standard on the M2 Pure).

There are two new petrol engines, two new badges and prices cuts of up to $10,000 right across the board for the line-up, along with additional standard equipment that improves the value equation even further.

The line kicks off with the 420, which can be had in either diesel or petrol guise. The 420i gains BMW's new B48 2.0-litre four-cylinder turbo petrol engine, which gains 5kW over the old motor to produce 135kW and 270Nm.

It also benefits from slightly improved fuel economy, with a drop of 0.3 litres per 100km for the Coupe and 0.5 for the Gran Coupe to 5.8L/100km, and a fall of 0.2L for the Convertible to 6.2L/100km.

The 420d retains its 140kW, 400Nm 2.0-litre four-cylinder turbo diesel engine, which returns 4.3L/100km in the fixed roof cars and 4.7L/100km for the Convertible.

The 430i – formerly known as the 428i – also receives the new 2.0-litre petrol engine, albeit in a 185kW/350Nm tune. Its fuel economy drops a healthy 0.6L for the Coupe and Gran Coupe and 0.4L for the Convertible, posting figures of 5.8 and 6.3L/100km respectively.

The top-spec 435i has been transformed into the 440i with the addition of BMW's new Twinpower 3.0-litre straight six petrol motor. Its output jumps 15kW to 240kW and by 50Nm to 450Nm, and its consumption falls by more than half a litre to 6.8 litres per 100km for the closed-roof pair and 7.2L/100km for the Convertible.

All cars come standard with a 'traditional' ZF eight-speed torque converter automatic transmission with steering wheel paddles as standard fitment, while a six-speed manual gearbox is a no-cost option across the line.

Claimed fuel consumption for the 220i Coupe, on the combined (ADR 81/02 - urban, extra-urban) cycle, is 5.9L/100km, emitting 135g/km of C02 in the process. The 220i Convertible rates 6.1L/100km (140g/km).

The 230i Coupe is line-ball with that at 5.9L/100km (134g/km), and the the 230i Convertible at 6.2L/100km (142g/km).

The price of performance starts to bite with the M240i consuming 7.1L/100km (163g/km) in coupe form, and 7.4L/100km (169g/km) as a convertible.

Then, as you might expect, the M2 is thirstiest of all, the dual-clutch auto consuming 7.9L/100km (185g/km), while the six-speed manual version slurps 8.5L/100km (199g/km).

Auto start-stop is standard, fuel tank capacity is 52 litres across the board, and although technically these engines can run on anything from 91-98RON unleaded, BMW recommends 95RON premium as a minimum.

Our brief test loop on a rainy, blustery Melbourne winter's day in all three model types (but no diesel) netted varying fuel consumption readings across the line; we recorded 8.4L/100km in a 420i sedan against a claimed figure of 5.8, 9.8L/100km for the 430i Gran Coupe against a claimed figure of 5.8L/100km, and 8.4L/100km against the 440i Gran Coupe's 6.8L/100km.

Four 2 Series variants were offered for the launch drive program, a 230i Coupe (which BMW nominates as the most popular model in the range), M240i Coupe, M2, and M2 Pure.

Claimed 0-100km/h acceleration of 5.6sec for the 230i M Sport Coupe is quick, with the convertible stopping the clocks three tenths later.

Peak torque of 350Nm is plenty, and with that number available from 1450-4800rpm the mid-spec 2 Series is an entertaining drive.

It's M Sport (strut front, five-link rear) suspension keeps the body well buttoned down in quick going, while the beefier M brakes provide strong and progressive stopping power.

Even a firm squeeze of the throttle can't side-step some hesitation as the turbo spools up before right foot pressure translates into forward momentum, but despite the sporty tune, ride quality is good (even riding on notoriously harsh 18-inch run-flat rubber), while response and road feel from the variable-ratio steering are excellent.

The eight-speed auto is beautifully slick, with manual changes, via wheel-mounted paddles, sharp and positive.

Add the grippy leather sports wheel, snug sports front seats, and racy cloth/Alcantara trim (leather in the convertible), and you have a comfortable, nicely balanced and fun-to-drive package.

Accelerating from 0-100km/h in 4.6sec (convertible 4.7sec), the M240i effortlessly achieves 'genuinely rapid' status. Yes, it's fast, but never furious, in the sense that even under the pressure of enthusiastic peddling it remains civilised and composed.

Maximum torque of 500Nm is not to be sneezed at, and when you realise that mountainous maximum is actually a flat-top plateau stretching from only 1520rpm up to 4500rpm, satisfying urge is never far away. And the flexible 3.0-litre turbo-six is an aural treat as it howls its way towards a 7000rpm rev ceiling.

The standard 'Adaptive M Suspension' offers settings from 'Comfort' through to 'Sport+', but even in the most forgiving mode the car remains taut and communicative.

The 18-inch rims, shod with Michelin Pilot Super Sport rubber (225/40 front / 245/35 rear) don't upset the ride as much as you'd expect, although coarse-chip surfaces send rumble through to the cabin.

In terms of ergonomics and general function, the new iDrive6 system is simple and intuitive to use, the current BMW dash and console layout is a model of efficiency, but the two-stage (depress small button on stubby lever, then shift) process to select drive or reverse can be a frustratingly hit-and-miss affair if you need to get going quickly.

Then, the M2 is all business, with a properly focused feel, and the ability to accelerate from 0-100km/h in a claimed 4.5sec for the six-speed manual, and just 4.3sec for the seven-speed dual-clutch. Try not to smile as that g-force shoves you back in your seat. You won't succeed.

Although peak power arrives at a relatively high 6500rpm, maximum torque of 465Nm (500Nm for limited periods on overboost) is ready for action across a broad spread from 1400-5650rpm, so the M2 has adrenalin flowing through its veins at all times.

An electronically controlled 'Active M Differential' manages torque distribution across the rear axle to optimise power down, with the ability to send anywhere from zero to 100 percent of drive to either back wheel.

The 'M Servotronic' steering, switchable through comfort and sport modes, is feelsome and linear in its response, the mega 'M Compound Brake' package (borrowed from big-brother M4) is professional grade, and while the seven-speed dual-clutch may shift faster, snicking up and down the manual's six ratios is a rare pleasure.

Rolling on 19-inch, ultra-high-performance Michelin semi-slick rubber (255/35 front / 275/35 rear) the M2 is never going to waft like a limousine, but if you're signing on for this kind of performance and dynamic ability, some ride harshness over less than perfect surfaces goes with the territory.

BMW introduced a raft of tweaks to the 3 Series platform late last year, which have translated over to the 4 Series. The key addition across the line is BMW's two-stage adaptive dampers that feature a Sport and a Comfort circuit, fitted as part of the M Sport pack that comes standard on the 430 and 440, and is a $2600 option on the 420.

Larger 19-inch rims are fitted to the 430i and 440i cars, while the 420 gets 18s out of the box. It's possible to fit 18s on the more expensive cars, as part of the no-cost Luxury option pack that supplants the standard M Sport pack.

While our test was brief and held in less than ideal road conditions, the large-wheeled 4 Series really didn't enamour themselves to this author. There's a distinct lack of communication from the tyres and chassis through the steering wheel and your backside, while the combination of firm Sport shocks and large 19-inch wheels with narrow-section tyres made for an uncomfortable ride over country roads.

Sampling a 420i with the Luxury 18-inch rims, however, improved things immensely, with much better feedback and comfort that didn't come at the expense of handling.

One of BMW's strong points should be its steering, given all the 3 and 4 Series cars are still rear-wheel-drive… but it's not, unfortunately. The electrically assisted set up is far from perfectly calibrated, feeling too dull and digital underhand, no matter what the setting.

The pick of the bunch performance wise is – logically – the six-cylinder 440i. The turbo powerplant is potent from right down the rev range, with a muted yet still pleasing engine note permeating the cabin. The self-shifting mode on the eight-speed auto does a good job of keeping up as well.

The updated 2.0-litre four is a sprightly performer, too.

 six airbags, lane departure warning, pre-collision safety pack, parking sensors, active cruise control with collision warning, AEB and pedestrian warning, along with reversing camera and surround-view cameras across the line.

BMW uses 'condition-based' servicing, with the car effectively telling you when it's time to visit the workshop, but the 'BMW Service Inclusive' program offers distance and time options to fix maintenance costs (on a 'Basic' or 'Plus' plan) for up to 10 years/200,00km.

For example, a five year/80,000km service package for the 2 Series costs $1340 for the Basic option (oil service/top-up, annual vehicle check, microfilter, air filter, fuel filter, brake fluid, spark plugs), and $3550 for the Plus pack (adds brake pads and discs, wipers rubbers, and clutch disc and plate).

The standard BMW warranty covers three years/unlimited km.

BMW offers a Service Inclusive program at the time of purchase, which for $1340 covers everything – including items like spark plugs, brake fluids and other fluids - for five years or 80,000 km scheduled. The cars are also covered by a three-year free roadside servicing program, in addition to BMW's two year, unlimited kilometre warranty.