2018 Mazda 3 vs Mazda 6

What's the difference?

The 3 is a terrific car and continues to improve with every yearly update, however minor. The uplift in the Neo Sport may not look like $1000 worth, but having that proper screen and reversing camera - along with standard AEB - starts to make sense over time.

In 2017, I said the pick of the range was the Maxx and I still reckon the Maxx Sport is the one to go for - it has a good package of safety equipment and a sensible spec list, without the frippery of the increasingly oddly priced Touring. The not-that-much-more SP25 is similarly specified, but only worth it if you want the extra power. Not everyone does.

The new i30 and forthcoming new Corolla are giving the Mazda3 more of a hurry-up these days, especially in price and spec but the i30 now has the driving dynamics to go with it. And with the Kia Cerato rapidly closing in, every little bit of competition is making the 3 a better car than before.

And it's still by far the best-looking car in the segment. For many, that's what will tip them over the edge.

The Mazda 6's competition is not nearly as good looking, and none have that smooth 2.5-litre turbo to get them whistling along with such little fuss.

You can buy a Camry and enjoy the solid drive, or a Kia Optima and enjoy the, erm, exclusivity. Or the turbo Hyundai Sonata, which is also somewhat exclusive.

The GT is a terrific car, and it's terrific because of its smooth, powerful and calming engine. It's a shame that the engine is only available in the top end of the range, though...

The 3's exterior design is still a winner to my eyes. Based on Mazda's Kodo design language, it looks great in just about any colour and the company's commitment to beautiful paint some years ago is still paying dividends.

It's a lovely, flowing design that looks best in the sedan and few cars in the segment are as genuinely pretty. About the closest you'll get for commitment to design is the Alfa Giulietta.

As you climb the range, the detailing in items like the lights and brightwork mark out the spec level, with additions like chrome exhaust tips and LED daytime running lights.

The range is available in seven colours - 'Sonic Silver', 'Jet Black', 'Deep Crystal Blue', 'Titanium Flash' (a sort of bronzey brown), 'Snowflake White' and 'Eternal Blue'. Mazda continues to be absurdly generous and offer those colours as no-cost options. 'Machine Grey' and 'Soul Red Crystal' (this one is a ripper) are a still-reasonable $300.

Unlike previous versions, there's no yellow or purple paint available.

Inside is well-executed but is a bit grey and drab, especially in the lower-spec versions. I recently drove a Touring with contrasting colour panels in the doors, but it was a deep rich red that barely stood out from the grey. 

Some touches, such as satin silver dash parts, do lift the colour a little but it's fairly nondescript. Mazda also persists with the frustrating single-dial-with-wings dashboard that I really don't like very much. Still, few others complain, so it's probably just me.

The 6 is a seriously good-looking car, and I mean that in a head-turning, wolf-whistling kind of way.

Mazda's Kodo design language rarely disappoints. Here in the 6, the facelift is similar in nature to the CX-5 - slimmed headlights, simplified shapes front and rear, but a muscular, lithe profile.

Changes in the cabin have been more noticeable, because unlike the exterior design, Things Needed To Happen. The old interior wasn't bad, but Mazda had this terrible habit of making its cabins dark and gloomy.

A simple thing like sending some of the indicator lights up into a unit with the rear vision mirror significantly reduced the clutter on the centre console. There's a distinct Audi influence in the way the horizontal stacked sections make the cabin feel wider and more airy, too. Just about everything has been changed, except the steering wheel and the shifter, and it's worked.

The 3 comes in two body styles - four-door sedan and five-door hatchback. The most popular is the shorter hatch, despite the loss of luggage capacity. The different boot space dimensions deliver 308 litres in the hatch while the sedan has 408 litres. For load capacity, the sedan is the clear winner.

The hatch's boot size isn't exactly a world-beater but it does feature a cargo cover to hide your valuables.

The interior dimensions are unchanged, meaning good if not outstanding rear leg room. The cabins are basically the same, so if you refer to our interior images, you'll note only minor differences.

The cup-holder count differs depending on which specification you choose. The Neo Sport has just two, for the front passengers. In the rest of the range there are two up front and two in the rear, with bottle holders in each door as backups. Some models feature extra storage space for books or devices but there's no sunglass holder until you reach the Touring.

The turning circle is a fairly standard 10.6 metres, so most suburban streets need a three-point-turn manoeuvre. Park assist is limited to beepers and the reversing camera.

Ground clearance when unladen is 160mm, so all but the steepest driveways won't present a challenge, but going off road is not on the menu. Kerb weights range from 1258kg for a Mazda3 manual Neo to 1336kg for an auto Astina.

Gross vehicle weight ranges from 1800kg to 1875kg.

Front-seat passengers score a pair of cupholders with a neat cover for when they're not in use. The centre console is on the smaller side, but a decent phone cubby under the climate controls makes up for that. The fold-down centre armrest features a pair of cupholders, too, plus there's a slot to hold a phone or small tablet upright, and a small lidded tray with a pair of USB ports.

There is plenty of room for front-seat passengers, and even those in the rear won't run into any headroom trouble. There is plenty of leg room, too, as well as decent foot room. Smaller folks will be okay in the middle seat.

Boot space isn't too bad, at 474 litres (VDA) with the rear seats in place.

The GT is third in a four-model line-up that starts with the $32,940 Sport and ends with the $50,090 Atenza diesel. The GT is the first in the range to feature the turbocharged petrol engine, which is kind of sad, because a turbo-powered Sport would be brilliant.

Starting at $43,990, you get 19-inch alloys, active LED headlights, black or white leather seats, power heated and folding mirrors, power windows, electric seats, an 11-speaker Bose stereo, auto headlights and wipers, dual-zone climate control, leather steering wheel and shifter, sat nav, keyless entry and start, active cruise control, adaptive headlights, front and rear parking sensors, heated front and rear seats and a space-saver spare.

Mazda's 'MZD Connect' multimedia system is accessible through the dash-mounted touchscreen and a console-mounted rotary dial. And my usual whinge about the lack of Apple CarPlay and Android Auto now has a happy-ish ending - by the end of 2018, you'll be able to retrofit both. Not perfect, but even older Mazdas dating back to 2014 are upgradeable.

There are two engine specs in the 3 range. Both are equipped with Mazda's 'i-Stop' stop-start technology but goes without the 6's 'i-Eloop' regenerative braking battery charging tech. Every model comes with a choice of gearbox, either a six-speed manual or six-speed automatic. The automatic is a traditional auto rather than the dual-clutch you might find in a Golf.

Both engines run on standard unleaded, use a standard oil type. Oil capacity is model dependent, and can be found in the owners manual. An oft-asked question is whether the 'SkyActiv' engine uses a timing belt or chain - we can report the engines are both chain-driven.

The Neo Sport, Maxx Sport and Touring all come with the 2.0-litre SkyActiv with 114kW and 200Nm of torque.

The SP25, SP25 GT and SP25 Astina are, as the name suggests, equipped with the larger 2.5-litre motor which churns out 138kW (almost exactly 200 brake horsepower in the old money) and 250Nm.

Towing capacity is rated at 1200kg braked and 600kg unbraked regardless of engine size.

The diesel vs petrol argument has long since been settled with the demise of the punchy but not particularly popular XD. So you won't have to worry about a diesel particulate filter replacement any more. There is no LPG or turbo sport edition, like the unruly old MPS3 performance car.

Performance figures vary between the two engines - the SP25 auto should complete the 0-100km/h acceleration test in just under eight seconds, with the 2.0-litre cracking it in around nine seconds. The manuals will likely be a tenth or so slower.

Mazda slaps a 'SkyActiv' badge on just about everything, so it will be no surprise to find that this engine bears the name. The GT's 2.5-litre four cylinder spins up 170kW and 420Nm - the same figure as the CX-9, but with a quite a few less kilos to haul.

The 6 is front-wheel drive, and power reaches those wheels via a six-speed automatic. I didn't think a six-speed 'box would be enough, but it didn't bother me at all.

Towing capacity is rated at 550kg unbraked and 1550kg braked.

Fuel-consumption figures vary slightly between the models. While the 3 has never been a fuel-economy star, as years have gone by its mileage has improved.

Official figures suggest that the 2.0-litre burns petrol at 5.8L/100km for the auto and 5.9L/100km for the manual, while the 2.5-litre consumes 6.1L/100km for the auto and 6.5L/100km for the manual.

Our own statistics suggest these ratings are a little on the optimistic side, which is no great surprise. We regularly get about 8.0L/100km in the 2.0-litre (a neat 12.5km/l) and around 11L/100km for the 2.5 (around 9km/l).

Fuel-tank capacity is 51 litres, regardless of engine size, and there's no need for premium fuel.

As I've already said, Mazda doesn't offer an oil-burner anymore as diesel fuel economy just isn't the drawcard it used to be.

Mazda says that the 2.5-litre turbo drinks 91RON (yep, the cheaper stuff) at the rate of 7.5L/100km.

My week with the car in mostly urban driving yielded a disappointing 11.3L/100km. That might have had something to do with my right foot, but that's classified information.

These days the 3 jostles at the head of the pack for driving dynamics. The MY17 model scored Mazda's new 'G-Vectoring' technology, which subtly sharpened the steering. This, along with tweaks to the front and rear suspension, has delivered a driving experience that is hard to fault. While it would be nice to have a bit more performance (the SP25 is still no fireball), it's fun to drive if you have a bendy road ahead of you.

Most of the time, though, you're in the urban grind and it is here that the 3 excels. The steering is light, accurate and  cleverly geared. The auto is a good one and even in town the light clutch of the manual makes progress easy and unfussed. Forget about the Eco mode, though - it's doughy and slow.

Over the years, Mazdas in general, but in particular the 3, have suffered from poor insulation, resulting in road noise invading the passenger space. 

Past reviews of mine, and many others, will rail against the cabin noise. Things have gotten better and continue to do so. Where in the past occupants would suffer from tyre rumble and a cacophony of suspension noise, particularly from the front, that's no longer the case. 

The noisy suspension issues have been sorted in various ways across the whole Mazda fleet and the 3 is now a much quieter, if not class-leading, proposition. But it does come close.

Okay, I feel I've misled you a little, way back at the beginning of this story.

I feel like I may have intimated that shoving this turbocharged engine under the bonnet meant a transformation to something a bit hotter. After all, it has a lot more torque than the fondly remembered 6 MPS, and isn't all that short of that monster's power figure either.

It's nowhere near a replacement for the 6 MPS, though. In fact, it's better than that.

Mazda got out of performance cars a long time ago, preferring to just pretend there's another RX-7 on the way (that story always surfaces in April for some reason). The new turbo engine isn't a huffing, puffing performer. It's actually borderline dull. It isn't peaky or laggy, but super-quiet and super smooth.

You can surf along on the torque, overtake with far less planning and buttock-clenching.

Adding the turbo engine to the 6 fixes what was an extremely competent car looking for a good engine. The standard petrol in the lower-spec cars is adequate, but it's not really up to the task of swift, effortless progress.

This turbocharged unit actually calms the driving experience because you know you can surf along on the torque, overtake with far less planning and buttock-clenching.

The rest of the car? Well it's as lovely and easygoing as ever. The new car is stiffer than before, and, like most Mazda updates, is filled with detail changes that add up to a significant improvement.

It's so much quieter, too, with just a bit of racket from the GT's bigger wheels over coarse surfaces. Most of the suspension noise from the older cars is gone.

Passengers really liked the interior of the 6, with its broader, airier feel, and in Soul Red with the white interior, it looks properly classy.

The 6 arrives with six airbags, ABS, stability and traction controls, high beam control, lane-departure warning, lane-keep assist, blind-spot monitoring, forward and reverse AEB, reverse cross-traffic alert, a reversing camera and traffic-sign recognition.

ANCAP awarded the Mazda a maximum five stars in 2012.

Mazda offers a three-year/unlimited kilometre warranty, with roadside assist subject to an additional yearly charge. So if you're worried about a flat battery or running out of fuel, the extra $90-$100 per year is a good investment. You can also purchase an extended warranty from your dealer.

Those worried about service costs will be pleased to know Mazda offers capped-price servicing. Your dealer expects to see you every 10,000km or 12 months, whichever comes first, and the prices are listed on the Mazda website, varying slightly between between engine types (by about $30 per service).

The 3 enjoys good resale value, with a check of our price guide suggesting a 2014 Neo will fetch between 65 and 75 per cent on a private sale, suggesting you'll have few issues when you need to shift a second-hand machine.

From what I've seen of older 3s, durability seems pretty good, even when in the hands of people who aren't all that careful with their cars. The 3 seems to suffer from few reliability issues. A quick swing through the usual internet forums uncovered no obvious common faults or defects. A search for automatic transmission problems, injector or transmission failure or other common problems yielded few genuine results. If you keep up with the maintenance, things seem fairly trouble-free for the current 3.

Diesel-engine problems are clearly a thing of the past, with no diesel offered.

Where is the Mazda3 built? An excellent question - all 3s come from Mazda's Japanese factories.

Mazda recently increased its long-standing three-year warranty to five years/unlimited kilometres, which was odd, because at the car's launch in May, they said three years was plenty. Still, I'm not arguing with the change.

Roadside assist, sadly, is not part of the deal. It costs between $99 and $109 per year.

Service intervals are a bit close at 12 months or 10,000km, whichever comes first. Prices are capped for the first five years, alternating between $312 and $341 for a total of $1618 for the first 50,000km.