The Chery KP31 bakkie – here’s what we know so far
The BYD Shark 6 has changed the way South Africans see Chinese bakkies. The Chery KP31 bakkie could be an even bigger deal.
South Africa’s lifestyle and luxury double-cab market is lucrative, and the Chinese brands have cottoned on. However, while the BYD Shark 6 has spearheaded the movement for truly desirable Chinese bakkies, it’s not without its flaws.
For one, it has poor payload and towing capacities. It also struggles with limited off-road ability due to a lack of low-range gearing. Traditional double cabs like the Ranger and Hilux might be less luxurious overall, but they’re still comfortable and they offer proper payloads and towing ability.
This raises the question: Is there a Chinese bakkie with all the power, rugged off-road ability and a typically OTT luxury cabin? Enter the Chery KP31…
Now that Australia has officially named it – the “Stockman” – more detail has been forthcoming. At the recent Chery South Africa factory handover event in Rosslyn, there was a heavy-duty KP31 on display. This gave us a better idea of its technical specifications and potential for South African double-cab bakkie buyers.
Mercedes-AMG V12 torque levels…
Chery has developed two powertrain options for the KP31 bakkie. Both are PHEVs and the total system outputs shame anything Ford or Toyota offers.
The KP31 petrol PHEV has a total system output of 395 kW and 1 000 Nm. That torque number is right at the limit of passenger-vehicle transmission engineering. AMG’s legendary V12 bi-turbo models were torque-limited to 1 000 Nm to preserve their automatic transmissions’ lifespan.
So, what of the KP31 petrol PHEV’s transmission? Well, Chinese drivetrain engineers have been working on very powerful EVs with huge torque outputs for years. There should therefore be no concerns about drivetrain issues.
That said, will the KP31 really offer 1 000 Nm at all times, or will this output be restricted to preserve the battery pack? We’ll get to that…
Can a diesel PHEV work?
The South African bakkie market is all about diesel powertrains. Nearly all locally sold double cabs are powered by diesel engines. That’s why Chery was under pressure to develop a turbodiesel powertrain for the bakkie.
There is no question about the Chery KP31 diesel PHEV’s stats. This version is rated at 350 kW and 800 Nm. For a double cab bakkie, those are tremendous powertrain numbers.
In the market for hardcore diesel bakkies, it absolutely outclasses legacy bakkies like the Land Cruiser 70 2.8 GD-6 (only 450 Nm) and the Ranger V6 turbodiesel (600 Nm). But the question is: how sustainable is the Chery turbodiesel PHEV’s continuous peak torque output?
With a hybrid setup, total system output can be sustained only for short durations. And if you need all of that 800 Nm, towing a trailer up one of South Africa’s steep mountain passes, there might be less peak torque available than you anticipate.
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Let’s talk about the DPF
Since diesel particulate filters (DPF) became a standardised emissions-control component on South African bakkies, the questions of start-stop systems, fuel quality, and driving cycles have become much more important.
DPFs need to heat up to initiate the chemical reaction that burns off the diesel particulate matter and carbon they collect. Achieving the required heat cycle usually means a decent amount of highway-speed driving at constant throttle loading.
In heavy traffic, DPFs can struggle to maintain operating temperature. That increases the risk of the DPF clogging, leading to unhappy consequences for the engine. Start-stop systems on diesel engines create much the same issue as severe traffic, limiting the thermal build-up a diesel engine needs for its DPF to function properly.
Chery’s diesel PHEV, with a start-stop system where the diesel engine competes with the electric drive for much of its operating range, seems like a DPF maintenance problem waiting to happen. But Chery could have a great solution…
That massive 34 kWh battery pack that powers the Chery double cab at low speed has ample power in reserve to preheat the DPF. This means the DPF can be kept at its required operating temperature when needed, even if the diesel engine is frequently cycling on/off during an urban driving cycle.
Proper bakkie suspension
Leaf springs or coils? That’s a technical question that divides many South African bakkie buyers.
Coils have less friction and allow for better high-frequency bump absorption across deep corrugations on a Karoo dirt road. That’s why bakkies with renowned dirt-road driving stability, like the Nissan Navara and Ranger Raptor, have coil-sprung rear axles. But coil springs can sag alarmingly under full load-bed payload, or when hitched up to a big trailer or caravan.
The BYD Shark has a coil-sprung rear suspension, which is a potential issue for some South African double cab buyers with demanding load requirements. Chery’s taken note of those preferences. The KP31 has rear-axle coil suspension on the petrol PHEV (which is a more urban lifestyle bakkie), while the diesel PHEV gets a rugged leaf-sprung rear axle.
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True lockers
Traction control and automatic transmissions have remarkably reduced the intimidation factor of off-road driving. But for really technical off-road trails, nothing beats a true axle locker.
The issue is that even the best traction control systems are reactive. They need a moment of wheel slippage to engage the brake and redirect torque to the opposing wheel, which has better purchase on available traction.
It’s that moment of hesitation between the system recognising wheel slippage and responding that can get you stuck. That’s why double cab bakkies with real off-roading ambitions have a proper locking axle at the rear. The most capable ones (Ranger Raptor/Super Duty and Land Cruiser 70), feature lockers on both front and rear axles.
Chery’s engineers know what they are doing – the KP31 has an advanced traction control system, as well as true axle lockers front and rear.
Like most advanced Chinese automakers, BYD’s South African sales are surging. But the Shark 6 has real all-terrain driving and load limitations. Chery reckons it has the answer in the form of the KP31 … time will tell whether discerning South African bakkie buyers agree.