GWM Cannon Alpha vs Holden Colorado

What's the difference?

The Cannon Alpha Ultra PHEV combines five-star safety, a confident warranty, lavish luxury and short-haul electric driving for a competitive price. However, from a pure workhorse perspective, its class-benchmark 3500kg tow rating is offset by a modest payload limit, plus an awkward spare tyre location which could be a deal-breaker for some tradies as it compromises working floor space and the securing of loads.

The Holden Colorado Z71 is a pretty decent towing machine, handling all aspects of general load-lugging duties with a quiet reliable efficiency. In simple terms, it kept the whole ute-and-van combination trucking along nicely.

The Z71 is a solid Colorado package all-round with some welcome flashiness to its functionality.

Our test vehicle shares the same body-on-frame chassis design, twin A-arm/coil-spring front suspension, four-wheel disc brakes and electric power-assisted steering as the model it replaces, but the previous leaf-spring live rear axle has been replaced by a multi-link coil-spring arrangement. External chrome has also been greatly reduced.

Its luxurious leather-accented interior has a spacious and classy feel with a panoramic sunroof and opulent mix of surface finishes, but some tradies might consider such indulgences too fancy for carting muddy-booted crews.

The PHEV’s larger rechargeable battery pack uses up all the underfloor space behind the rear axle usually occupied by a full-size spare tyre. As a result, the steel-rimmed spare has been moved to a conspicuous location in the load tub, which not only looks like an afterthought but is far from ideal for workhorse duties (see Practicality).

The Colorado is a good-looking unit, so it follows that the Z71, the Colorado line-up's top dog, should be the best-looking vehicle in the entire range. And it is. Look at the photos yourself and make up your own mind.

The Z71's black highlights everywhere, the roof rails, side steps and fold-away tonneau cover add functionality to the flashiness.

Under its slick exterior, the Z71 sits on a steel ladder-frame chassis.

There may be no mechanical differences between the Z71 and other similarly-powered Colorado utes, but this is not merely a sticker-pack special – this is something more substantial than that. Don't believe me? Keep reading.

Our test vehicle’s substantial 2810kg kerb weight is 235kg heavier than its hefty Alpha Hybrid predecessor, due largely to the bigger battery and electric motor. That makes it about half a tonne heavier than numerous conventional turbo-diesel 4x4 dual cab utes.

This substantial kerb weight contributes to a sizeable 3495kg GVM, yet results in a 685kg payload rating which is modest compared to some turbo-diesel rivals with genuine one-tonne capabilities.

It’s also rated to tow up to the class-benchmark 3500kg of braked trailer, but with its 6745kg GCM (or how much it can legally carry and tow at the same time) that would require a 250kg reduction in payload (from 685kg to 435kg) to avoid exceeding the GCM.

While it’s unlikely owners would need to tow at the 3500kg maximum, it’s important to be aware of these numbers if the need arises, as that 435kg of payload could easily be used up by a crew of tradies before you could load any of their tools.

The vertical mounting of the spare wheel in the load tub not only reduces floor space and load volume but also restricts the securing of loads, given there’s no anchorage point accessible in the right rear corner of the tub.

So, all load straps extending rearwards must share the same left-side anchorage point, which is far from the ideal even spread provided by four-corner load restraint. This spare wheel location needs a rethink (perhaps a swing-away carrier favoured by 4x4 wagon owners would be better).

We also noted the big button on the two-way tailgate, which enables it to split into a pair of hinged doors, stopped working during our test. Fortunately, it could still open the tailgate as a conventional single unit.

There’s ample interior space, not only for front seat occupants but also those in the back. That includes tall people, given I’m 186cm and have at least 40mm of knee room when sitting behind the driver’s seat when set in my position.

There’s also about 80mm of rear headroom, despite the presence of a full-length sunroof which can often compromise this dimension. However, shoulder-room is tight for three adults, so two would be preferable for long trips.

Front-of-cabin storage includes a large-bottle holder and bin in each front door, plus a large glove box, overhead glasses holder and a pull-out compartment for the driver in the lower dash.

The centre console offers wireless phone-charging and a lidded box (with internal air-con flow available) and two small-bottle/cupholders. Another storage nook in the lower right-side of the console offers two USB ports, a 12-volt socket and enough space for a phone.

Rear passengers get a large-bottle holder and bin in each door, pockets on the rear of both front seat backrests and small pull-out drawers under each outer seat. The rear of the centre console also offers adjustable air-vents, a pair of USB ports plus controls for seat heating/cooling and the sliding rear window.

The fold-down centre armrest offers another wireless phone-charging pad, pop-out twin cupholders and a hidden compartment for storage of phones or other slimline items.

The Z71 has a Colorado carry-over interior, which is nice and simple, with some Z71 branding stitched in the front seats.

For starters, there are grab handles for the driver and front passenger – I'm a big fan of grab handles.

The dash is a basic layout – but made family-friendly with expanses of tough plastic and soft-touch leather – and it has everything you need. The centre console houses an 8.0-inch colour touchscreen with Apple CarPlay and Android Auto and standard nav.

There is a USB port in the centre-bin, and there's a 12V socket in the back of that bin for back-seat passengers.

The cabin is reasonably comfortable; the front seats – in fact all of the Z71's seats – err on the side of firm rather than being well-cushioned. But, even in the back seat, when I sat behind my driving position, I had ample head- and leg-room.

There are the usual collection of storage spaces around the cabin – sunglasses, glove box, door pockets, seat-back pockets – but a long centre-bin lid impedes access to the cupholders in between driver and front-seat passenger, and there are no cupholders in the back seat's fold-down centre arm-rest.

There are shallow storage spots under the rear seats, one of which contains your jack etc.

Overall fit and finish is impressive without being spectacular, but that's fine with me.

The tray is 1484mm long, 1534mm wide (1122mm between the wheel-arches) and 466mm high. Back there, you get Premium DuraGuard Spray–on tub liner, which seems sturdy and durable, as well as four solid tie-down points.

The Z71 auto 4x4 dual-cab has a list price of $57,490 MSRP. Our test vehicle is $59,260 MSRP because, over and above its comprehensive list of Z71 features (and those from cheaper variants), it has an electric brake controller ($740), and a towing package ($1030).

The Z71-specific features include a heap of style-based stuff, such as black fender flares, new front fascia, roof rails, and stickers on the bonnet, as well as 18-inch grey alloys (on Bridgestone Dueler H/Ts), sailplane sports bar, black highlights everywhere – including exterior door handles, mirrors and tailgate handle.

But the Z71 buyer gets plenty of useable real-world stuff such as roof rails, soft-drop tailgate, fold-away tonneau cover, and decent underbody protection.

There's also a leather-wrapped steering wheel and leather seats.

It has a 2.8-litre four-cylinder turbo-diesel Duramax engine, six-speed automatic transmission, a part-time 4WD system and a rear limited slip differential.

Bonus: there are plenty of genuine Holden-designed, -engineered and -tested accessories, including frontal protection bars, LED light bars, extended sports bars and more, that are probably available for your Colorado.

The Alpha PHEV drivetrain consists of a 2.0-litre, four-cylinder, turbo-petrol engine that produces 180kW of power and 380Nm of torque. This is paired with an electric motor that adds another 120kW/400Nm, so combined they officially produce 300kW and 750Nm.

The electric motor draws its energy from a 37.1kWh lithium-ion rechargeable battery. GWM claims it can be charged from 30 to 80 per cent in less than 30 minutes using 50kW DC charging, or around 6.5 hours using AC charging.

It also has up to 6.0kW of V2L (Vehicle to Load) functionality, using a dedicated adapter cable which plugs into the vehicle’s charging port and provides a standard three-pin AC outlet for numerous electric tools and appliances.

The nine-speed torque converter automatic, which offers sequential manual-shifting using steering wheel-mounted paddles, is paired with the familiar Borg Warner ‘Torque on Demand’ 4x4 system.

For road use, this has three selectable drive modes ('Standard'/'Sport'/'Eco') with the centre differential remaining unlocked to automatically adjust torque delivery between the front and rear wheels in response to any loss of traction.

For off-road use, selecting '4H' (4x4 High Range) or '4L' (4x4 Low Range) locks the centre differential to provide an even 50:50 torque split between the front and rear wheels. 4L traction can be optimised by engaging the front and rear diff-locks.

The Z71 has a 2.8-litre four-cylinder turbo-diesel Duramax engine (147kW at 3600rpm and 500Nm at 2000rpm), six-speed automatic transmission, a part-time 4WD system and a rear limited slip differential.

GWM claims official combined average consumption of only 1.7L/100km when the highly-charged battery allows most driving to be done in pure electric mode. GWM also claims an official ‘low charge’ figure of 7.9L/100km, when the battery is depleted and the petrol engine is doing most of the work.

It has an NEDC electric-only driving range of up to 115km and a ‘hybrid’ driving range (petrol engine and electric motor combined) of up to 1060km. The petrol engine drinks standard 91 RON unleaded.

The dash display was showing average petrol consumption of 6.4L/100km at the completion of our 324km test, which comprised a mix of suburban, city and highway driving of which about one third was hauling a heavy payload. This was lineball with our own figure of 6.2 based on fuel bowser and tripmeter readings.

Starting with 90 per cent battery charge, we completed 72km of electric-only driving before it automatically switched to hybrid mode when the charge reached 14 per cent. The system would not allow charge to drop lower than that for the remainder of our test, which was conducted in hybrid mode.

So, based on our own test figures, GWM’s claim of more than 1000km of hybrid driving range is credible from its combined 37.1kWh battery and 75-litre fuel tank capacities.

Our dash display read 7.9L/100km, but we recorded actual fuel consumption on test of 9.7L/100km. It has a 76-litre fuel tank, so expect an approximate driving range of 753km (according to our on-test fuel consumption), factoring in a 30km safety buffer.

On our towing loop, of more than 200km total, the dash was showing 14.5L/100km, but we recorded an actual fuel-consumption figure of 15.5L/100km. Expect an approximate driving range of 460km (according to our on-test fuel consumption), factoring in a 30km safety buffer.

It has good steering feel with sophisticated ride quality, the latter thanks to four-coil suspension and substantial sprung weight which helps iron out the bumps and deliver a ride that’s more SUV than ute.

Flatten the accelerator from a standing start and up to 750Nm of torque responds with impressive force, even though you can feel that every one of those Newton metres is required to overcome more than 2.8 tonnes of inertia to get this jigger moving swiftly.

Although the option of sequential manual-shifting is available using the steering wheel paddles, we spent most of the test in auto mode as it felt like it was getting the best out of this complex drivetrain.

It’s a competent highway cruiser, too, with the petrol engine requiring 2200rpm to maintain 110km/h with low noise levels.

To test its GVM rating we forklifted just over half a tonne (505kg) into the load tub, which with driver equalled a 600kg payload that was less than 90kg under its limit. The rear coil springs compressed about 50mm, but there was no evidence of bottoming-out on our test route.

Ride, handling and braking were largely unaffected, along with the drivetrain which made light work of our 13 per cent gradient, 2.0km set climb at 60km/h.

Engine-braking on the way down, in a manually-selected second gear, was equally impressive. It never exceeded the 60km/h speed limit, even though its total vehicle weight of around 3.5 tonnes was being restrained by only a 2.0-litre four and regenerative braking.

The Z71 has a steel ladder-frame chassis, double-wishbone front suspension and leaf-spring live rear axle, so it's more aligned with heavy-duty work than smooth on-road performance.

Having said that, the Z71 is quite settled over most surfaces, including highway bitumen and rough back-road backtop, and at most speeds – rather impressive for an unladen ute.

Steering is a bit floaty, with some play in it, and there is noticeable understeer on corners.

The engine is one of the torquiest in the current-day ute mob – only matched by V6 utes – and it delivers that torque quite evenly and smoothly across the rev range. The Duramax turbo-diesel can, however, be noisy, and because of that it seems like it's working hard, though it never feels too stressed, even when towing a caravan that has a caravan with a tare (empty) weight of 2600kg.

There's plenty of life in terms of acceleration with active pedal-feel but, when it comes time to pulling up to a fast stop on front disc and rear drum brakes, the brake pedals are rather spongy.

The six-speed auto is generally spot-on for all duties, although it did occasionally down-shift with an extra violence of action when it didn't really need to.

Ride and handling are pretty good, with its Aussie-tuned suspension (including traditional-ute leaf-springs at the rear) doing a decent job of sorting everything evenly, and it was only ever rattled by very severe bumps, wash-outs, and ruts at lower speeds, i.e. during low-range 4WDing.

The Z71's on-road performance and refinement are generally not as polished as segment leaders, but that's nowhere near a deal-breaker.

The Colorado line-up has a five-star ANCAP rating as a result of testing in 2016.

Safety gear includes seven airbags, front and rear parking sensors, a reversing camera, Forward Collision Alert), Lane Departure Warning, a tyre-pressure-monitoring system, Hill Descent Control, Hill Start Assist, Trailer Sway Control and Roll Over Mitigation.

Warranty cover is seven years/unlimited km with an eight years/unlimited km traction battery warranty and seven years of roadside assist.

Scheduled servicing is every 12 months/15,000km whichever occurs first. GWM offers seven years of capped-price servicing totalling $4615, or an average of $659 per service.

Holden offers a five-year, unlimited-kilometre warranty across the Colorado range, with servicing required every 12 months or 12,000km. Capped price servicing applies over seven years/ 84,000km with the average annual cost over three years working out to be $405.