A Bigger Tank 300? China Reveals Long Wheelbase Hi4-Z Variant

Details have been revealed of a new and noticeably larger version of the popular GWM Tank 300 for China’s official data declaration register.

Regulatory filings in China show a longer and wider Tank 300 variant called the Hi4-Z, hinting at the possibility of an expanded version of the rugged SUV that has quickly built a cult following in Australia.

The updated model not only grows in size but also introduces a revised front grille emblem design, suggesting subtle styling updates alongside the larger proportions.

Whether this bigger Tank 300 will eventually reach Australia remains unknown, but the numbers alone make it an interesting development.

Tank 300 Hi4-Z Dimensions

Chinese declaration data lists the following dimensions for the new model.

For context, the current Tank 300 sold in Australia is smaller across every key measurement.

That means the new Hi4-Z is:

• 126 mm longer
• 54 mm wider
• 24 mm taller
• 260 mm longer in wheelbase

The wheelbase increase is particularly significant. An extra 260 mm between the axles would likely translate into more rear passenger space and improved highway stability, two areas where ladder-frame SUVs can benefit from a longer footprint.

For road trips, that could mean better comfort over long distances and more usable cabin space.

Subtle Styling Changes

Images accompanying the Chinese filings show a revised grille emblem design, departing slightly from the bold horizontal Tank lettering used on existing global models.

The change appears modest but reinforces the direction that GWM has been taking with the Tank brand. The goal is clear. Position the Tank lineup as a more premium off road focused sub brand within the wider GWM portfolio.

Expect additional minor exterior changes such as:

• New wheel designs
• Revised grille detailing
• Potential updates to bumper styling

Australia’s Benchmark: Tank 300 Hi4-T

In Australia, the newest version of the Tank 300 is the Hi4-T plug in hybrid, which blends traditional 4WD hardware with electrified performance.

Key specifications include:

Importantly for Australian buyers, the Hi4-T retains the ingredients that helped make the Tank 300 popular with off road enthusiasts.

That includes:

• Ladder frame chassis
• Low range transfer case
• Front and rear locking differentials

In other words, it remains a proper off road vehicle first, electrified SUV second.

What Could the Hi4-Z Be?

The Hi4-Z name suggests this new variant could represent another step in GWM’s expanding electrified drivetrain strategy.

While full details have not yet been revealed, several possibilities stand out.

A Long Wheelbase Tank 300

The most obvious explanation is that the Hi4-Z could simply be a long wheelbase version of the Tank 300, offering more interior space without stepping up to the larger Tank 500.

A More Premium Variant

The larger body may also signal a move toward a more comfort oriented Tank 300, positioned slightly higher in the lineup.

Next Generation Hybrid System

The “Hi4” naming remains consistent with GWM’s electrified powertrain strategy, but the Z designation may point to a revised hybrid architecture or different motor layout.

Could Australia See the Bigger Tank 300?

The Tank 300 has quickly become one of the more interesting entrants into Australia’s growing off road SUV market.

Buyers have responded well to its blend of:

• Retro inspired styling
• Strong off road capability
• Competitive pricing

A longer wheelbase Tank 300 could broaden that appeal even further.

For Australian road trips, extra cabin space and improved ride comfort could make the larger variant particularly appealing.

For now, however, the Tank 300 Hi4-T plug in hybrid remains the electrified flagship available locally.

Whether the bigger Hi4-Z eventually joins it in Australia is something we will be watching closely.

Watch our Tank 300 Diesel review below.