If you're shopping for a 40-something-foot cruising catamaran, sooner or later you'll be staring at a Lagoon 42 listing. Everyone does. It's one of the best-selling cruising cats ever built, and there are good reasons for that. We own and sail a Fusion 40 — Mā Tori, which is currently for sale, so read this with that in mind — and we've spent enough time aboard Lagoons, in boatyards next to Lagoons and anchored beside Lagoons to have formed a fairly clear view of where each boat wins. This isn't a hit piece. The Lagoon 42 is genuinely excellent at what it was designed to do. The point of this article is that the two boats were designed to do quite different things, and knowing which of those things you actually want is worth more than any spec sheet.
Two very different design philosophies
The Lagoon 42 is a VPLP-designed production catamaran built in Bordeaux by one of the largest boatbuilders in the world. Its brief is volume, comfort and ease: a gullwing bridgedeck, a self-tacking jib, enormous interior spaces and a layout that works equally well for a family liveaboard or a charter fleet. Thousands of people have circumnavigated in Lagoons. The design has been refined across a huge production run, and the ownership experience — parts, brokers, insurers, surveyors who know the boat — is about as smooth as it gets in yachting.
The Fusion 40 comes from the opposite direction. Gary Lidgard designed it as an Australian kit/modular catamaran — around 60 were built — with hulls resin-infused in professional moulds and boats finished either by yards or capable owners. The brief was a light, quick, easily driven cruising cat that a couple could handle offshore. Where Lagoon optimised for volume, Lidgard optimised for weight. That single decision flows through everything else in this comparison.
Build and weight: what a few tonnes means at sea
The Fusion 40's topsides are resin-infused foam-sandwich with vinylester resin, over solid fibreglass below the waterline. Vinylester matters: it's significantly more resistant to osmosis than the standard polyester used in most production boats of the era, and resin infusion gives consistent glass-to-resin ratios that hand layup can't match. The result is a stiff, light structure — the Fusion 40 is notably light for a 12.2-metre catamaran with 7 metres of beam.
The Lagoon 42 is a well-engineered production layup, typically displacing in the region of 12 tonnes light — and considerably more once cruising gear, tankage and owners' possessions come aboard. That's not a criticism; the weight buys enormous interior volume, sound insulation and a solid, planted feel. But displacement is the tax every catamaran pays on performance. A heavier cat needs more sail area to move, loads its rig and hardware harder, motors more in light air and burns more diesel doing it.
At sea, the difference shows up in ways spec sheets don't capture. A light cat accelerates onto small pressure. It rides over waves rather than shouldering through them. And when the forecast window is marginal — as it always seems to be on the NZ–Fiji run — a boat that sails well in 8 knots of breeze gives you options a boat that needs 14 simply doesn't have.
Head-to-head specifications
| Spec | Fusion 40 (Mā Tori) | Lagoon 42 |
|---|---|---|
| LOA | 12.2 m | Around 12.8 m |
| Beam | 7.0 m | Around 7.7 m |
| Draft | 1.1 m | Around 1.25 m |
| Displacement (approx.) | Light for her size — a genuine performance-cruiser weight | Typically around 12 t light ship, more loaded |
| Cabins | 3 queen cabins (owner's hull to port) | 3 or 4 cabins depending on version |
| Engines | Twin Yanmar 3YM30 29 HP saildrives | Typically twin 45–57 HP saildrives |
| Typical used price | USD $299,000 fully refitted, Cat 1 | Typically around US$400k–650k depending on year and condition |
| Offshore setup notes | Cat 1 certified; watermaker, 700W solar, 540Ah lithium, Starlink + Iridium already fitted | Strong offshore pedigree; ex-charter examples usually need systems upgrades for bluewater independence |
Sailing performance
This is where the boats diverge most. The Lagoon 42 sails better than its critics claim — the current generation especially, with mast moved aft and a bigger self-tacking jib, is an honest passagemaker that will reel off steady 150–180 mile days in trade-wind conditions. The self-tacker makes short-handed sailing genuinely effortless, and the gullwing bridgedeck does a reasonable job of softening wave slap for its clearance.
But physics is physics. A light, easily driven hull with fine entries simply does more with the same wind. The Fusion 40 keeps sailing in single-digit breeze where heavier cats fire up the diesels, points a little higher, and rewards good trimming in a way that keeps sailing interesting rather than merely functional. Good bridgedeck clearance relative to her weight means less slamming in a seaway than you'd expect from a 40-footer. Across three NZ–Fiji seasons we've had consistent, comfortable daily runs with a two-person crew and never once wished for a heavier boat.
The honest flip side: the Lagoon's extra mass gives it a steadier, less lively motion at anchor and in chop, which some crews — particularly those prone to seasickness or with young children — genuinely prefer. Lively is a feature to some sailors and a bug to others. Know which you are.
Draft, and where you can take her
Mā Tori draws 1.1 metres. The Lagoon 42 typically draws around 1.25 metres. On paper that's a small difference; in the Pacific it's the difference between tucking inside a reef pass at half tide or waiting outside, and between drying out on a Northland beach for a scrub or paying for a haul-out. Neither boat is deep by monohull standards — this is one of catamaran cruising's great gifts — but the shallower boat always gets the better spot in the anchorage.
Layout and liveaboard space: the Lagoon genuinely wins here
Let's be completely straightforward: if maximum interior volume is your priority, buy the Lagoon. The 42's saloon is enormous, the cabins are bigger, headroom is generous everywhere, the galley works for a crowd and the aft cockpit is a proper outdoor room. Four-cabin versions sleep eight-plus in real comfort. For a family living aboard full-time, or owners who entertain six people at anchor every week, that volume is not a luxury — it's the whole point, and no 40-foot performance cruiser matches it.
What the Fusion 40 offers instead is quality of space rather than quantity. The panoramic saloon puts you at eye level with the anchorage through big windows, the galley-saloon-cockpit flow works beautifully for a couple or small crew, and all three cabins carry genuine queen berths — rare in this size. Mā Tori's owner's hull to port has an electric head and separate shower, which makes her feel like an owner's boat rather than a charter compromise. But we won't pretend a Fusion 40's interior rivals a Lagoon 42's. It doesn't, and buyers who walk through both will see it in thirty seconds.
Systems and energy independence
A used boat is really a used set of systems, and this is where individual boats vary more than the models do. Many used Lagoon 42s — especially ex-charter — come with modest solar, lead-acid batteries sized for marina life, and no watermaker, because charter boats plug in every week. Budget realistically: lithium conversion, a solar arch, a watermaker and comms can absorb US$40–60k and a season of installation time.
Mā Tori's 2022 refit was aimed squarely at independence: 700W of solar into 540Ah of lithium with a 2000W inverter, an OceanF10 watermaker fitted in 2025, Raymarine electronics with autopilot, and both Starlink and Iridium for offshore comms. New sails in 2022, antifoul in May 2025. The twin Yanmar 3YM30s are small at 29 HP each, but a light hull needs far less pushing — and smaller engines mean cheaper servicing, cheaper parts and less diesel. On a heavy boat those engines would be undersized; on this one they're matched to the load.
Price for capability
A used Lagoon 42 typically sits around US$400k–650k depending on year, spec and history. A refitted Fusion 40 at USD $299k is a different budget entirely — and the gap widens once you cost the offshore upgrades many used Lagoons still need. On ex-charter Lagoons in particular, surveyors routinely flag high engine hours, tired running rigging, charter-grade upholstery and soft spots in heavily trafficked deck areas. None of it is disqualifying — charter boats are usually well-maintained mechanically because downtime costs money — but it belongs in your total cost of ownership, not as a surprise after the survey.
The counterweight, and it's a real one: the Lagoon's resale market is deep and liquid. There are always buyers for a Lagoon 42, brokers everywhere know exactly how to sell one, and financing and insurance are straightforward. A Fusion 40 is a rarer boat with a smaller (though loyal) buyer pool, and you should expect a longer sale process at the other end. If exit liquidity matters to you, that's a genuine point in the Lagoon column.
So who should buy which?
Buy the Lagoon 42 if: you want maximum living space for a family or frequent guests; you value a huge owner community, easy parts and worldwide broker support; you may want charter revenue to offset costs (the Lagoon is built and certified for exactly that); you prioritise resale liquidity; or you simply prefer the solid, planted feel of a heavier boat. These are all legitimate, rational reasons, and for many buyers they're decisive.
Buy a Fusion 40 if: you're a sailing couple or small crew who actually wants to sail — including in light air; you value low weight, shallow draft and modest running costs over sheer volume; you'd rather buy a boat already set up for offshore independence than fund a systems refit; and roughly USD $299k all-in appeals more than US$450k-plus-upgrades. If you're also weighing the Lagoon 46, 51 or 55 — lovely boats, all of them — be aware you're moving into a different budget class entirely, typically US$700k to well over a million once well specced, with running costs to match.
Our honest summary: the Lagoon 42 is the better apartment; the Fusion 40 is the better sailboat. Which one is "the better catamaran" depends entirely on which of those two things you're really buying.
Keep reading: for the full story on our boat, start with our Fusion 40 owner's review, see how she stacks up against the wider field in the best cruising catamarans under $500k, or dig into the trade-offs in owner-built vs production catamarans. And if the Fusion side of this comparison sounds like your kind of boat, Mā Tori is for sale now.