Design and Construction
The 455 Grand Large belongs to Dufour's cruising line, distinguished from the Performance series by hulls that are a little deeper and somewhat fuller forward and aft, a sail plan that is less lofty but plainly adequate, and a shallower keel. The hull is hand-laminated GRP with an NPG gelcoat backed by NPG resin in the skincoat to guard against osmosis. The balsa-cored decks are formed by resin infusion, and the internal grid structure supporting the keel is reinforced with Twaron, an aramid fiber similar to Kevlar. That grid is glassed directly to the hull for stiffness and provides the anchoring point for the chainplates. A massive stainless-steel bonding strap connects the keelbolts to the grounding system — one of several small details that signal a builder investing for the long term. Under the cabin sole, foam strips keep lift-out boards from rattling and the edges of the floorboards are sealed, practical touches that only get noticed on a long passage when everything else starts to squeak.
Rig and Handling
The deck-stepped Sparcraft alloy mast is rigged 15/16ths fractional with double spreaders swept well back and continuous rigging. On each side, cap, intermediate, and lower shrouds converge on a single chainplate close to the cabin trunk, leaving side decks uncluttered and allowing a tight headsail sheeting angle. A tierod carries the rig load through to a longitudinal girder behind the saloon furniture. The 455 carries a comparatively small half-battened mainsail and acquires most of its drive from an overlapping 140-percent genoa, which makes the boat easy to handle shorthanded. Harken 44.2 ST winches sit on the cabin top for halyards; 53.2 ST primaries live on the coamings within reach of the helm. On the water, the 455 stood up just fine under full working sail in gusty, damp conditions that had other boats reaching for a reef — well balanced and energetic without being demanding. The traveller on the coachroof keeps it clear of the cockpit, and the boom clears helmsmen's heads without overhanging the wheel. The twin-wheel layout allows safe access from the helm to the cabin-top winches when a quick adjustment is needed.
Cockpit and On-Deck Living
The cockpit is bounded by deep coamings, sturdy quarter pulpits, and a solid folding aft seat that together create a sense of security rare in a boat this beamy. The moulded seats are large enough to accommodate six crew in comfort. A walk-through arrangement between the dual helms leads to a Euro-style fold-down boarding platform with swim ladder, handheld shower, and safety lines. Wide bulwarks make moving to the bow straightforward even when heeled, and the flat cabin profile is easy to negotiate. Forward, twin anchor rollers project on a stainless-steel support, the Quick windlass is partially recessed to keep deck sightlines clean, and a roomy sail locker sits under a large access hatch just aft of the chain locker. Low step increments from cockpit seat to coaming to side deck to coachroof mean the deck layout rewards solo sailors who need to move fast.
Accommodations
Below, the 455 is offered in three- and four-cabin configurations. In the three-cabin layout, the forward master stateroom features an island king-size berth flanked by small settees, generous hanging lockers, and a pair of escape-size hatches overhead that provide light, ventilation, and bright airiness. The two aft cabins tuck under the cockpit and deliver surprising space above the berths given their position, along with hanging lockers, shelves, and cross-flow ventilation. A technical space along the centreline separates the aft cabins and houses batteries and mechanical systems, with room to expand the standard house bank. The saloon demonstrates how straight lines and right angles can create a living space that is functional, comfortable, and pleasing to the eye. The port-side galley runs longitudinally with a long Corian counter, top-opening refrigeration, twin sinks, a saltwater foot pump, and 250 litres of top-loaded refrigeration and freezer capacity for serious offshore provisioning. All joinery is finished in prime-choice Moabi mahogany, with the interior well lit by numerous hatches, deadlights, and ports during the day and by carefully placed lighting at night.
Known Quirks and Weak Points
The editorial record is consistent on a handful of irritants. The galley portlight is fixed rather than opening, an omission that becomes frustrating in warm anchorages. The owner's forward ensuite has only a manual toilet; an electric head in the master cabin is an obvious upgrade most owners will eventually pursue. The shower arrangement in the owner's head draws criticism for lacking a separate shower stall and a showerhead hook. Mainsail controls lead to either side of the companionway rather than back to the helm, meaning that a solitary watchstander would want an autopilot while trimming the mainsail in demanding conditions. The bilge sump is notably small — likely a production efficiency trade-off — and the miniature bilge sump is one quirk reviewers flag as a long-term concern worth addressing early.
Refits and Upgrades
The 455 arrived from the factory ready for personalisation. Reviewers consistently noted that beyond the standard specification, the boat needs electronics, a tender, entertainment gear, a desalinator, and bedding to reach genuine offshore readiness. The 12V system features generous house, engine-start, and generator battery banks, and the technical space offers room to expand. Owners fitting the boat for bluewater work typically add an autopilot, watermaker, and additional 240V appliances. The electric winches fitted to test boats proved their worth immediately; push-button electric primaries made tacking a snap shorthanded, and their absence on base-spec boats is the single upgrade most likely to transform the sailing experience. The teak cockpit floor and side-deck teak are popular options that add maintenance but deliver the unmatched feel of teak on bare feet that many experienced cruisers still value. A bowthruster, fitted to the Australian test boat, aids marina manoeuvring considerably given the 455's generous beam.
The Verdict
The Dufour 455 Grand Large represents the Cantiere del Pardo era's clearest statement of intent: a volume cruiser built with measurably better engineering and finish than earlier Dufours, designed by Umberto Felci for sailors who want genuine passage-making capability without sacrificing the comfort of a liveaboard. It sails better than its beam and displacement suggest, it carries enough water and fuel for serious coastal work, and its interior is configured logically for shorthanded couples or families. The quirks are real but minor and addressable; the fundamentals are sound.
Pros
- Well-balanced, stands up to a breeze without needing a reef early
- Single chainplate per side keeps side decks clear for easy foredeck access
- Three generous double cabins with two heads in the standard layout
- Moabi mahogany interior finished to a standard noticeably above earlier production
- Comprehensive access to engineering items throughout the boat
- Large cockpit with twin wheels that suits shorthanded sailing
- Resin-infused decks and Twaron-reinforced keel grid are durable construction choices
Cons
- Mainsail controls do not lead to the helm — an autopilot is essential when sailing solo
- Fixed galley portlight limits ventilation in warm climates
- Small bilge sump warrants early inspection and possible enlargement
- Manual toilet in the forward ensuite is a common upgrade target
- Base specification requires meaningful additional outlay to reach offshore readiness
