The Hymer Yellowstone 640 is the longest campervan in Hymer's Fiat-based range. At 6.36m on the Ducato 3.5t platform, it gives you noticeably more interior space than the sub-6m models while still sitting within standard UK driving licence limits at 3,500kg. This prize is configured with the 2.2-litre MultiJet engine producing 140hp and the 8-speed automatic gearbox, plus Equipment Line Plus with the full Fiat Infotainment system, digital cockpit, and smartphone wireless charging.
The layout centres on twin longitudinal single beds at the rear, each measuring around 195cm x 80cm on Hymer's disc spring mattress system. Slot in the centre infill and you get a double measuring 195 x 160cm. The beds stay made up permanently, so your lounge and kitchen space is never compromised by sleeping arrangements. Side wall panelling in heat and noise insulating fabric keeps the bedroom warmer and quieter at night, and there are skylights, opening windows with blackout blinds, and overhead lockers throughout.
Under the beds, the storage area is accessed via the expanding rear doors and handles bikes, chairs, awnings, and all the bulkier kit you accumulate on longer trips. Lashing eyes in the floor keep heavier items secure during transit, and the pull-out bed step doubles as a load compartment partition.
The L-shaped lounge uses swivelling cab seats with seat heating and Hymer's Travel Lounge bench with tilt adjustment. The attachable table has a slide-out extension, and ISOFIX is fitted on the bench for families. With four belted seats and a genuinely sociable layout, it works for couples and families alike. The whole interior benefits from Hymer's Venture S-inspired materials: Ivy Green furniture with Indiana fabric, cork surfaces, and leather detailing.
The kitchen runs along one side with a two-burner gas hob and sink combination under a glass cover, a 90-litre compressor fridge with freezer compartment and silent night mode, an expandable worktop, and deep drawers with premium pull-outs and soft-close mechanism. The fridge runs on 12V or 230V, and there's a pull-out spice rack and large two-piece cutlery insert. At 190cm standing height, it's a comfortable space to cook in.
The mid-ship bathroom has a cassette toilet with level indicator, a folding washbasin in solid surface material, and a shower tray with dedicated shower area. There's an illuminated mirror cabinet, skylight for ventilation, and an exterior shower connection for rinsing boots or wetsuits before they come inside.
The Yellowstone 640 comes with 6kW gas warm air heating and a 10-litre hot water boiler as standard, so it's genuinely usable year-round. The 110-litre fresh water tank (20 litres accessible while driving) and 95-litre heated waste water tank give you decent self-sufficiency between stops. The HYMER Smart Battery System uses an 80 Ah LFP battery with a 70A charging booster, and everything is controllable through the 7-inch touch display or the HYMER Connect app on your phone.

This is the core factory specification that makes the Yellowstone 640 such a capable touring campervan. It covers the everyday essentials you rely on, from the Fiat Ducato driving kit to the premium living setup.
Standard equipment includes:
This prize configuration includes the following factory-fit upgrades on top of the comprehensive standard specification:
The Yellowstone 640 is Hymer's longest Fiat-based campervan, and the extra length over the 5.99m models shows in everyday use. The twin longitudinal beds at the rear stay made up permanently, so you never lose your living space to sleeping arrangements. Each bed sits on Hymer's disc spring mattress system, which gives noticeably better support than a standard foam mattress. Slot in the centre infill and you have a double measuring 195 x 160cm.
The kitchen keeps things focused with a two-burner hob and sink combination under a glass cover, a 90-litre compressor fridge with freezer compartment, and an expandable worktop that makes a real difference when you're cooking properly. Deep drawers with premium pull-outs and the pull-out spice rack keep everything accessible without cluttering surfaces.
The bathroom sits mid-ship with a cassette toilet, folding washbasin in solid surface material, and a dedicated shower area. The 6kW gas warm air heating with 10-litre hot water boiler keeps the van genuinely warm in all seasons. The 110-litre fresh water tank and 95-litre heated waste water tank give you decent independence between stops.
On the road, the 8-speed automatic gearbox and 140hp engine handle the 6.36m length well. The Equipment Line Plus adds the full Fiat Infotainment system with 10-inch touchscreen, sat nav, Apple CarPlay, and Android Auto. Driver assistance covers emergency braking, lane keeping, speed assist, and fatigue detection as standard. The HYMER Smart Battery System with 80 Ah LFP battery and 70A charging booster keeps habitation electrics running efficiently.

In Ivy Green, the Yellowstone 640 looks sophisticated and contemporary. It's a deep, forest-inspired shade that sits beautifully with the matte black 16-inch alloy wheels and fog lights with cornering function. The frameless aluminium windows give it a sleek profile, and the integrated LED gutter light above the sliding door is both stylish and practical.
The overall effect is a campervan that feels cohesive and premium from every angle. When the weather cooperates, the 4-metre anthracite awning rolls out to create instant outdoor space, backed by integrated LED lighting for those long summer evenings. Add the LED headlights and heated windscreen, and it's a van that stays looking sharp while handling real-world UK touring in all seasons.

Step inside the Yellowstone 640 and the first thing you notice is the quality of the materials. The Indiana Cognac leather upholstery and cork surfaces create a warm, inviting atmosphere that's genuinely premium. Both cab seats swivel to face the Travel Lounge seating area, which has Hymer's innovative tilt adjustment for relaxed evenings. The seat heating is separately adjustable for driver and passenger, which is one of those touches you appreciate every time you stop on a cold afternoon.
The table is attachable with a slide-out extension, so it adapts whether you're having a quick lunch or settling in for a longer evening. There's ISOFIX on the seating unit too, making it family-friendly when needed. Lighting is handled through Hymer's three-level concept: ambient lighting in living and kitchen areas, LED reading lights with touch control, and the overall LED scheme that can be controlled via HYMER Connect app or the 7-inch touch display.

At the rear, the twin single beds run lengthways, each measuring 195cm x 80cm. They sit on Hymer's innovative sleeping comfort mattress with integrated disc spring system, which gives you proper support and genuine comfort rather than just a basic foam pad. If you want to run the beds as a double, you can slot in a centre infill section to create one continuous sleeping surface measuring 195cm x 160cm.
The bedroom benefits from thoughtful touches that make it feel like a proper retreat. Side wall panelling in heat and noise insulating fabric creates a warmer, quieter space at night. There are skylights above for natural light and ventilation, plus an opening window with blackout blind and mosquito net. Overhead lockers keep clothes and kit organised, while the under-bed storage area handles larger touring essentials. The pull-out bed step doubles as a load compartment partition, with embedded lashing eyes in the floor to keep heavier items secure during transit.

The Yellowstone's kitchen is designed for serious use rather than just heating up tins. You get a two-burner hob with electric ignition and glass cover, a deep sink with premium mixer tap, and an expandable worktop that genuinely makes a difference when you're prepping a proper meal. The 90-litre compressor fridge with freezer compartment sits at a comfortable height, with a silent night mode for peaceful evenings.
Storage is handled through deep drawers with Hymer's premium pull-outs and soft-close mechanism, plus the new comfort push locks with genuine leather loops. There's a pull-out spice rack that keeps everyday essentials close at hand, and overhead lockers throughout. The whole kitchen zone benefits from the 190cm standing height and ambient LED lighting, making it a genuinely pleasant place to cook even when the weather outside is doing its thing.

The Yellowstone's compact wet room is designed for proper everyday use. It features a cassette toilet with level indicator, a folding washbasin with quality mixer tap, and an illuminated mirror cabinet with integrated magnetic vanity mirror. There's a dedicated shower tray with wooden slats underfoot, shower curtain, and hose holder to keep everything contained when you're washing.
A skylight in the bedroom brings natural light and ventilation into the space, while an opening window with blackout blind and mosquito net lets you manage airflow and privacy. The whole bathroom benefits from thoughtful detailing, from the towel rail to the opaque window for privacy. An exterior shower connection is fitted as standard too, which is brilliant for rinsing sandy feet, muddy boots, or a wetsuit before it comes back inside.
Opposite the kitchen is the washroom area. It’s compact, but it’s properly kitted out for real touring: a cassette toilet, a fixed basin, and a separate shower setup that’s ideal for rinsing off sandy feet, salty hair, or the day’s mud and mileage.It’s one of those features that changes how you use the van without you even realising at first.
You’re not constantly planning around campsites or public facilities. You can stop where you want, stay a little longer, and keep the day running on your terms.

The Yellowstone 640's layout feels natural the moment you step inside. The Travel Lounge seating area sits immediately behind the swivelling cab seats, creating a proper social space without any awkward gaps or transitions. The tilt-adjustable seating, attachable table with slide-out extension, and seat heating all combine to make this a genuinely comfortable place to spend time, whether you're having a quick lunch stop or settling in for a longer evening.
Move back through the van and everything flows logically. The kitchen zone benefits from the full 190cm standing height, with the 90-litre compressor fridge, two-burner hob, and deep sink all positioned for easy use. The expandable worktop gives you proper prep space, while deep drawers with premium pull-outs and soft-close mechanism keep everything organised and accessible. Overhead lockers throughout maintain the clean lines while providing excellent storage.
The compact wet room bathroom sits in the central section, keeping the daily rhythm feeling natural without interrupting the flow between living and sleeping areas. At the back, the twin lengthways single beds create a proper bedroom zone that feels like a retreat rather than an afterthought. Fold them up and you've got access to the large under-bed storage area, with lashing eyes in the floor to keep touring kit secure during transit. The pull-out bed step doubles as a load compartment partition, showing Hymer's attention to detail throughout.

On the road, the Yellowstone 640 delivers the kind of effortless driving experience you want when you're covering serious miles. It's built on the Fiat Ducato 3.5t chassis with the 2.2 MultiJet III engine producing 140hp, paired with an 8-speed automatic gearbox. At 6.36m long and 2.05m wide, it's longer than most campervans, but the automatic transmission and comprehensive driver assistance make it far easier to handle than you'd expect.
The driving tech is genuinely impressive. Active Distance Assist with Stop & Go manages motorway traffic automatically, keeping you at a safe distance and even handling stop-start queues without constant pedal work. Add lane centring assist and traffic jam assistant, and long motorway runs feel genuinely relaxed rather than tiring. Blind spot assist covers your vulnerable areas when changing lanes or merging, which is particularly reassuring in a 6.36m van.
LED headlights, heated windscreen, and the comprehensive visibility package mean you're well set up for winter touring or early starts. ParkPilot front and rear with rear-view camera takes the stress out of tight pitches or supermarket car parks. The altitude kit ensures the diesel heating works properly at elevation, so mountain passes stay comfortable. It's not pretending to be a 4x4, but the reinforced suspension, stabilisation, and towbar preparation mean it handles gravel tracks, wet grass, and steep campsite exits with confidence.





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