INEOS Grenadier towing capacity: 3,500 kg leaves 453 kg

The current MY26 handbook supplies the Australian mass table

INEOS now publishes an Australian MY26 owner's handbook from its documentation page, so the central towing calculation no longer needs to borrow a 2023 road-test table. For the five-seat Station Wagon it lists 3,550 kg GVM, 7,000 kg gross train weight, 3,500 kg braked towing, 750 kg unbraked and 350 kg maximum nose or vertical load. The same table gives maximum payload of 803 kg for the diesel and 877 kg for the petrol.

The handbook calls the starting figure basic weight. It includes 90 per cent fuel and all operating liquids, but no driver, and it warns that equipment changes the final vehicle. Subtracting payload from GVM gives 2,747 kg for the diesel and 2,673 kg for the petrol. Those current figures are 7 kg and 8 kg higher than the 2,740/2,665 kg figures in a dated 2023 Australian review, so current calculations should begin with the handbook.

The federal approval independently anchors the range. ROVER lists VTA-060920 as in force and the current Station Wagon and Quartermaster variants at 3,550 kg GVM, 3,500 kg braked and 750 kg unbraked. Its tare figures are lower because tare and the handbook's basic-weight convention are not interchangeable. For payload planning, keep the figures from one coherent manufacturer table rather than combining a ROVER tare with handbook payload.

A 3,500 kg trailer leaves 453 kg in the diesel and 527 kg in the petrol

Two calculations run whenever a trailer is attached. The vehicle side is GVM less towball load: 3,550 less 350 leaves 3,200 kg for the Grenadier itself. The combination side is GCM less trailer mass: 7,000 less 3,500 leaves 3,500 kg. The smaller vehicle-side allowance controls, so the diesel result is 3,200 less 2,747, or 453 kg. The petrol is 3,200 less 2,673, or 527 kg.

That remainder covers the driver, passengers, accessories, recovery equipment, luggage and anything else added to the basic vehicle. It is not 803 kg of payload plus a separate 350 kg towball allowance. The ball is load carried by the vehicle, while the trailer's ATM already includes it; counting it once on the vehicle side prevents the common double-counting error. The GVM guide explains the same budget from the compliance-plate end.

A lighter caravan creates room, but not kilogram for kilogram while GVM is binding because a conventional 10 per cent ball assumption changes with it. At 3,000 kg ATM and about 300 kg on the ball, a diesel retains roughly 503 kg; at 2,500/250 kg it retains about 553 kg. The petrol equivalents are about 577 kg and 627 kg. These are screening examples, not prescribed ball percentages: use the measured ball load and the caravan maker's loading instructions for the real pairing.

Australia gets a 50 kg higher plate, but only 42–43 kg more payload

The current British MY26 handbook makes the market comparison unusually clean. It lists a 3,500 kg GVM, the same 7,000 kg train weight, 3,500 kg braked rating and 350 kg maximum nose load. Its five-seat basic weights are 2,740 kg diesel and 2,665 kg petrol, producing 760 kg and 835 kg of headline payload. The equivalent Australian figures are 803 kg and 877 kg.

So the plate itself is 50 kg higher, but the usable difference is 43 kg on the diesel and 42 kg on the petrol because the Australian basic weights are also 7–8 kg higher. Market equipment and homologation mass still matter even when the bodies look alike; the GVM difference cannot simply be copied across as the payload difference.

The 7,000 kg combined figure is not what limits a Grenadier at a 3,500 kg trailer. It leaves room for a 3,500 kg vehicle, 300 kg more than the GVM-and-ball calculation permits. GCM matters at the other extreme: a Grenadier loaded to its full 3,550 kg GVM can tow only 3,450 kg before the pair reaches 7,000 kg. A tow badge never means the vehicle may also sit at full GVM.

Station Wagon, Quartermaster and trim names need separate checks

The live Australian range presents the Station Wagon, Fieldmaster, Trialmaster and Black Edition as configurations, with petrol and diesel choices. Fieldmaster and Trialmaster are specification levels, not accessory packs whose weight can be subtracted from a base row. The handbook's maximum-payload figures are model-level ceilings; the individual compliance plate and actual scale weight decide what a vehicle with side steps, roof gear, winch or drawers can carry.

The same MY26 handbook also publishes a Quartermaster mass table. It carries the published 3,550 kg GVM, 7,000 kg train weight, 3,500/750 kg towing limits and 350 kg vertical limit, with maximum payload again listed at 803 kg diesel and 877 kg petrol for both the two- and five-seat vehicle. Those identical seat rows can be grouped by fuel in the table; body, trim and fitted equipment still require the vehicle's own plate and measured starting mass.

ROVER shows why a body swap is not harmless. Current approval rows give a 2,922 mm wheelbase for the Station Wagon and 3,227 mm for the Quartermaster, with different overall lengths. A towball acts behind the rear axle, so its axle effect depends on that geometry and the installed hitch position. Do not transfer a Station Wagon lever estimate or axle split to the ute.

The rear axle and tow tongue are the unresolved practical margins

The current handbook supplies the major masses but not a clear Australian axle-rating table in its towing pages. Robert Pepper's September 2023 Australian test reported 1,667 kg front and 2,150 kg rear, and an upgrade engineer later published the same pair. Treat those as secondary figures: read the limits on the individual vehicle and capture front, rear and trailer-axle weights on the same loaded weighbridge visit.

Australian owners also found that the Grenadier's vertical towing interface is not the familiar square receiver assumed by many local accessories. In a forum thread dated 27 December 2023 to 15 January 2024, owners compared a custom Allin tongue weighing 7.4 kg, a Hayman Reese receiver solution and an articulated Gen-Y option. Those reports are useful buying intelligence, not certification: the installed interface, tongue, ball and fasteners all need compatible ratings and approval.

Tongue length matters even when every component is rated. Moving the ball farther behind the rear axle increases the rear-axle load and unloads the front axle for the same measured ball weight. Owners in that thread warned about long local adaptations working against the Grenadier's short body overhang. Use the shortest approved arrangement that clears the caravan, then measure the loaded axle split rather than treating 350 kg as the only coupling number.

A weight-distribution hitch can transfer some load forward only when the vehicle, towbar and hitch makers permit it and it is adjusted correctly. It does not create payload or raise GVM, GCM, axle, ball or towing limits. That distinction matters on a Grenadier because the headline residual can remain positive while a long tongue and rear-mounted accessories consume the rear-axle margin first.

What Australian owners and reviewers add to the numbers

The owner record is small but specific. By August 2024, three Australian contributors said they had covered more than 13,000 towing kilometres between them without reporting an overheating problem; one reported about 19 L/100 km while towing. Real caravan ball loads mentioned in those discussions sat around 240–266 kg, below the 350 kg ceiling. None of those anecdotes proves reliability or maximum-load behaviour, but they show the combinations owners were actually using.

Two setup details recur. Owners criticised the original all-terrain tyres for wet-road grip while towing, and one said reducing front pressures from 43.5 to 38 psi transformed rough-road steering. Tyre pressure must still follow the vehicle and tyre guidance for the actual axle load; a forum setting is not a universal prescription. The useful lesson is to record load, pressure, temperature and behaviour together instead of changing one number blind.

Steering reports need a model-year label. Launch-era Australian reviews described slow response, play around centre and frequent small corrections. INEOS announced a variable-ratio steering box and revised lock stops for MY26, with an approximately five per cent smaller turning circle. That makes old criticism relevant to used vehicles, not proof of how a current one behaves. A separate safety check remains current for older cars: recall REC-005925 covers 206 vehicles built in 2022–23 for steering-linkage fasteners that could loosen. Check a used vehicle by VIN and confirm the free remedy.

A Grenadier pairing is decided by the load you add after the handbook

The diesel's 453 kg result is a starting allowance, not a touring-fit verdict. If a measured vehicle is already 200 kg above handbook basic weight before hitching, 253 kg remains after allowing for the 350 kg ball; at 350 kg above basic, only 103 kg remains. A 7.4 kg tongue, a winch, protection, roof rack, fridge and recovery kit all subtract their actual masses before luggage. INEOS itself publishes 150 kg as the moving roof-load ceiling and 420 kg static for the Station Wagon; staying below the roof limit does not stop that gear consuming GVM or raising the centre of mass.

Start with the vehicle's own plate and an empty or known-baseline weigh. Add measured trailer ATM and towball mass, then load the same occupants, water and touring gear used on the trip. Check GVM, GCM and both axles together. Can I Tow It? can screen the pairing and identify the first limit, while a certified weighbridge supplies the evidence. A calculator cannot infer the mass of an unlisted bar, tray or roof setup.

Once the baseline is measured, loadmate can keep the same rig useful as people, water and gear change. The Grenadier-specific value is seeing the 453/527 kg vehicle budget and the secondary rear-axle margin move together, rather than treating the 3,500 kg badge as the answer. Read how the Live Rig Score is built and the safety disclaimer before relying on a planning result. Towing compliance and operation remain the driver's responsibility.