A stint behind the wheel of a heavily disguised Mazda CX-9 suggests there will be much to look forward to from the longer, lighter, and more punchy seven-seater.

WHAT IS IT? An all-new CX-9 that takes Mazda’s latest Kodo design language and drapes it over a seven-seat version of the CX-5’s SkyActiv platform. The current CX-9 pre-dates Mazda’s SkyActiv models that focus on fuel efficiency and dynamics via lightweighting and optimised internal combustion engines.

WHY WE’RE DRIVING IT This is our first taste of the all-new CX-9. The original went on sale in 2007, and while it’s selling well for the brand, it’s significantly older and becoming increasingly dated against the swathes of much fresher SUVs in its class. Its earlier architecture limits things customers expect, such as driver safety assistance.

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MAIN RIVALS Toyota Kluger, Hyundai Santa Fe, Kia Sorento, Ford Territory, Holden Captiva 7, Jeep Grand Cherokee, Nissan Pathfinder, Toyota Prado

THE WHEELS VERDICT The CX-9 takes Mazdas already strong platform architecture and teams it with an excellent, frugal and capable new engine. It’s more refined, much more efficient and more convincing in prototype form, with strong detailing, fit and finish. It’s a more opulent, accomplished seven-seater than before.

PLUS: Smarter look, vastly improved efficiency yet superior drivability; more safety gear and rear passenger space, excellent cabin refinement MINUS: Sorry kids, no third-row air-con vents; boot packaging compromise by lower roof; no diesel engine option will limit appeal

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The CX-9 arrives on the crest of a Mazda success wave, and is the last of its range to benefit from its ‘SkyActiv’ approach to building cars. That means it rides on the same platform as the CX-5, which is also used on the Mazda 6 and 3 – all vehicles praised for their dynamics and fuel efficiency. With a focus on weight saving, the 9 is now around 130kg lighter, despite the fact that there’s more interior space and the similarly-sized boot. The 55mm increase in wheelbase creates more rear seat room, with loads of head- and leg-room in the second row. The third row – while lacking air-con vents – is large enough for children and the occasional short trip for rowdy adults in need of removal from the local RSL.

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It also hosts the completely new 2.5-litre turbo-petrol four-cylinder that replaces the 3.7-litre V6. While Mazda has taken an alternate route to most other makers with its four-cylinder engines by avoiding forced induction, the monster torque of the new CX-9 – 420Nm at 2000 rpm – couldn’t be achieved as efficiently with a SkyActiv V6 as it could with a turbo four, all while hitting the fuel efficiency improvement target its engineers were aiming for. That torque alone compares to the V6’s 367Nm at a lofty 4250rpm, even if its 169kW trails the larger engine’s 204kW.

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On the road, that makes the stickered-up, all-wheel-drive prototype CX-9 smooth, with an audible engine note that never turns coarse, and smooth, strong power delivery. The six-speed automatic behaved well on our short test drive, and the brakes were strong, not bitey, with good pedal feel. The steering, with its large leather-wrap steering wheel, has good weighting and feel from its commanding position, could be a little sharper in its responses. The ride on the Falken-tyre shod 20-inch alloys is comfortable, but can be crashy over larger bumps. The handling, meanwhile, is predictable, with great roadholding and poise.

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Mazda Australia is yet to confirm spec levels and pricing for the CX-9, but the range is likely to reflect the current three-model Classic, Luxury and Grand Touring offering, although there is a possibility of a higher-spec flagship. Pricing isn’t expected to deviate from the current car’s $43k kick-off when it lands here next year. Regardless, the CX-9 already has the polish of its stablemates, and that’s ominous for its competitors.

BOOST APPEAL MAZDA says that it will sell 50,000 CX-9s annually, not many when it has an engine developed especially for it. Surely the 2.5-litre turbo will make an appearance in other models, as it fits in the 3, 6 and CX-5. The latter is the most likely, as the engine already runs 1.2 bar of boost and has limited power growth potential, making it not so good for a hot hatch or performance sedan. It also develops its 420Nm at 2000rpm, but that peak peters off earlier than the old V6, which plateaued at 4250rpm, as engineers found that in the real world, CX-9 drivers rarely breach 4000rpm, and only occasionally tap 3000rpm.

SPECS Model: 2016 Mazda CX-9 AWD Engine: 2488cc 4cyl, dohc, 16v, turbo Max power: 169kW @ 5000rpm Max torque: 420Nm @ 2000rpm Transmission: 6-speed automatic, all-wheel drive Weight: 1940kg (est) 0-100km/h: 8.3sec (est) Fuel economy: 8.9L/100km (est) Price: $48,000 (est) On sale: July 2016