The Viper 130 is a big, fast yacht with a slightly unusual brief. At nearly 40m, it has five guest cabins, huge outdoor spaces and proper crew areas, yet three 2,200hp V12s and waterjets push it to around 35 knots. That combination of space and speed shapes much of the boat, from the side-opening tender garage and one-sided deck to the way the crew move around it.
ISA Viper 130
- LOA 38m
- Model Year 2026
- Cabins 5
- Crew 5
- Max Speed 33 knots
- Status In Production
- Yacht Type Sports Yacht
- Use Type Cruising
- Vessel M/Y Fast Naan
Video Tour
On Deck
The stern gives you a pretty good idea of what the Viper 130 is about. There is a massive area right down at water level, with balconies that drop on both sides, a huge sunpad in the middle and a lot of seating around it. Lower the balconies and the deck reaches right out over the water. There is a big storage space beneath the sunpad, while the tender has its own side-opening garage.
A transformer platform sits in the centre of the stern. It lowers into the water to form a set of steps, rises for quay access and folds back into the transom when you want a clean, flush stern. With the balconies down, this whole area feels enormous. You are right at water level too, which is exactly where you want to be once the boat is at anchor.
The main deck aft has a different feel. A big overhang gives the dining table plenty of shade, with a bar close by and the galley immediately inside. Drop the galley window and food can go straight out to the table. It also opens the galley up when you want a more informal setup or some cooking in front of guests. Simple idea, and a useful one.
Up on the flybridge there is another huge outdoor area. A broad sunpad fills the aft end, with the main seating, dining space and bar beneath the hardtop. The bar has a Kenyon grill, sink and refrigeration, and windbreaks run out along tracks at the sides. There is loads of shade, plenty of room for a crowd and enough kit up here that you could spend most of the day without much reason to head below.
The upper helm is right forward. Large multifunction displays fill the dash, with joystick and jet controls close at hand. What is useful here is the direct route from the main bridge below. Crew can move straight between the two helms, and the position up top gives a much better view when the yacht comes into port or works in close quarters.
Access to the bow is only down one side. The reason is quite simple. Take away the port side deck and the saloon can push much farther out towards the hull, which gives you more room inside. You lose the full walkaround deck, of course, so there is a trade here, but on a yacht with such a big saloon it is easy to see why they have done it. The starboard walkway also gives the crew a direct route forward from the galley.
There are some lovely details along here. The stainless guardrails have an oval section and the welds are beautifully finished. At the bow, soft pads sit beneath the ropes and fenders to protect the painted hull from rubbing. The hull itself is GRP with carbon fibre reinforcement. It is the sort of small practical detail you tend to notice on a boat that has had plenty of thought put into how it will actually be used.
Right forward, a Portuguese bridge sits ahead of the superstructure with storage around it, then there is a huge hot tub and more seating at the bow. It should be a fantastic spot under way at normal cruising speeds. With all three engines wound up and the boat close to 35 knots, you might choose somewhere a little farther aft.
There is a lot of outdoor space on the Viper 130, but it does not all feel like the same space repeated on different decks. The stern puts you right down beside the sea. The main deck aft has shade, dining and the galley close at hand. Up top there is room for a much bigger gathering, while the bow feels more tucked away. The side-opening tender garage and one-sided deck help free up much of that room, which is a sensible use of the yacht's near-40m length.
Interior Accommodation
The galley is right at the back of the main deck, next to the outdoor dining area. A big window drops away so food and drinks can go straight outside, and it also lets the galley open up when you want a more informal setup. There is plenty of refrigeration and freezer space, along with storage, an ice maker and two wine coolers. Crew also have their own door straight out onto deck, while the day head is tucked away close by.
The saloon is a big space, helped by the fact that there is only one side deck forward. Huge floor-to-ceiling windows run down the sides, with large sections that slide open, so you can open this area right up when the weather suits. There is another side door too, which gives a second way on and off the yacht.
There is a lot of stonework in the finish and the lighting is beautifully done and there is plenty of detail in the walls and furniture without it all becoming too fussy. It feels quite bold in places, which suits the yacht. Nothing here feels old-fashioned, and there is enough going on in the materials to keep the space interesting.
The bridge is a little higher, with a forward-sloping windscreen and a bank of large displays across the dash. These can handle the cameras, radar, charts and engine information, with communications and thruster controls close by. Then there are the jet controls, which are the first proper clue that this is not a normal 40m yacht underneath.
There is also a direct route from the bridge up to the flybridge helm. That gives the crew an easy way between the two positions, just as the galley has its own way outside. It keeps the working routes simple and avoids sending crew through the main guest areas every time they need to move around the boat.
Guest Accommodation
There are five guest cabins on the lower deck, all with their own bathrooms. The owner's cabin itself is at the end of the corridor and uses the full beam, with big windows on both sides, a desk and dressing area and a full walk-in wardrobe. The finish is very modern, with a wave-like panel behind the bed and some lovely lighting around it.
The bathroom is the standout feature really as it runs right across the yacht, with a window at each end and a huge shower in the middle. Separate basin areas sit either side, so each person has their own space without doubling up on the biggest part of the room. It is a very good use of the beam and gives the suite a real sense of scale.
The two double guest cabins are both a good size, with wardrobes, dressing space and large en suites with rainfall showers. Farther along are two twins, again both en suite, with good storage and the same standard of finish. One also has a Pullman berth that folds down when you need another bed, which gives a bit more flexibility for children or an extra guest.
For a yacht with this much machinery below, the accommodation has come out of it very well.
Crew Accommodation
The crew area sits down on the lower deck with its own way on and off the yacht. There is a crew mess, a separate laundry room and three crew cabins, all kept away from the main guest spaces.
The mess has a table that opens out, plus a small cooking area with a sink and fridge, and there is access here to the yacht's operating systems too.
Performance & Engine Room
There are three V12 diesels in the VIper's engine room, each producing 2,200hp, so you have 6,600hp in total. Rather than conventional shafts and propellers, they drive two main waterjets and a third booster jet, which is enough to push this near-40m yacht to around 35 knots. That is serious speed for something this size.
The engine room is full of big machinery. The three engines sit across the space with two large generators alongside, while huge exhaust runs disappear aft towards the transom. The shafts into the jet units are visible farther back, along with the Marine Jet Power equipment. There is plenty going on down here, but access around the machinery still looks good enough for the crew to get at the important bits.
The waterjets are what make the setup particularly interesting. Two do the main work, with the third adding more thrust when the boat is pushed hard. A 35-knot top speed is impressive enough on paper, but the scale makes it rather more striking. Imagine doing 30 knots in a decent-sized sportsboat and having this come past you.
There is also an emergency route straight from the machinery space up onto deck, so the crew has another way out if needed. Close by is the side-opening tender garage, with space for a 5m tender. Putting the garage here keeps the stern free for that huge waterside deck rather than filling it with launching gear.
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Pricing
Price as reviewed: €19,900,000 (£17,050,926 approx)
The Viper 130 is currently advertised from €19.9 million, based on a 2027 stock example listed for sale. Specification and final price will vary between builds, so check YachtBuyer MarketWatch for the latest ISA Viper 130 asking prices and yachts currently available.
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Rivals to Consider
There are not many yachts around 40m that try to combine this much accommodation with this sort of speed, but the Pershing GTX116, AB Yachts AB 130 and Mangusta 132 all come at the idea from slightly different angles.
The Pershing GTX116 is the smallest of the three at 35.24m (115.6ft), but it still packs five cabins into its 239GT and has a particularly strong outdoor layout. Standard triple 1,800hp MAN V12s give 32.5 knots, while the optional 2,000hp engines lift that to 35.5 knots, almost exactly Viper 130 territory. It is a broader, more relaxed take on the fast-yacht idea, with a huge beam of 7.72m (25.3ft), a jacuzzi, hydraulic swim platform and open flybridge. The Pershing gives away more than four metres in length to the Viper, yet still offers proper superyacht accommodation for ten. Buyers less interested in outright speed and more concerned with deck space and day-to-day living may find that balance rather appealing.
The AB Yachts AB 130 is much closer to the Viper 130 in both size and intent. At 39.65m (130.1ft) it is almost the same length, with a 7.90m (25.9ft) beam, five cabins and accommodation for ten guests. It also uses three 2,200hp MAN V12s for the same 6,600hp total, but AB quotes a top speed of 41 knots. That makes the difference fairly stark. The Viper is extremely quick for a yacht of this size, but the AB pushes the same basic idea another step. Its 1.30m (4.3ft) draft is shallow too, and the standard equipment includes at-anchor and underway stabilisers, a pool, foredeck seating and a tender garage. This is probably the one a Viper buyer needs to look at most closely because the two yachts are chasing much the same owner.
The Mangusta 132 takes a different route again. Built from 2015 to 2020, it is now a second-hand alternative rather than a current model, but at 39.85m (130.7ft) it sits almost exactly alongside the Viper on length. Three 2,600hp MTU V16s produce a huge 7,800hp, although its 291GT and heavier, more substantial build keep maximum speed to around 34 knots. What you gain is volume and range. Mangusta quotes 550nm at a very brisk 32-knot cruise, backed by 20,000 litres of fuel, and the lower-deck owner's cabin gets a study, sofa and separate dressing areas. It feels more like the classic big Mangusta formula - lots of power, a long low profile and serious accommodation underneath it.
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Specifications
- Builder ISA Yachts
- Range Viper
- Model Viper 130
- Length Overall 38m
- Beam 7.9m
- Draft 1.5m
- Hull GRP
- Cabins 5
- Berths 7
- Crew 5
- Yacht Type (Primary) Sports Yacht
- Use Type (Primary) Cruising
- Cruising Speed
- Max Speed
- Fuel Capacity 20,000 Litres
- Fresh Water Capacity 3,500 Litres
- Engine Model 3x MAN V12X-2200
ISA Viper 130 Layout
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Flybridge
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Main Deck
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Lower Deck
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Standard forward master cabin layout
![Lower Deck ISA Viper 130]()
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Optional midships master cabin layout
![Lower Deck ISA Viper 130]()
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