Diamond 44M
- LOA 44.06 m
- Beam 9.16 m, draft approximately 2.31 m
- Gross tonnage 471 GT, full-load displacement around 340 tonnes
- Hull GRP (fibreglass)
- Guests up to 10 in 5 suites, crew 8
- Exterior design Giorgio M. Cassetta
- Twin MAN V12 diesels (1,400 hp each), top speed around 15 knots
- Sun deck reported at around 102 sq m, Class 44M is the successor model
Benetti's flagship in composite
The Diamond 44M sits at the top of Benetti's fibreglass range, the point where the composite line reaches towards custom-yacht scale. At just over 44 metres it delivers volume and presence usually associated with metal builds while keeping the efficiency of a series product. The model became one of the yard's steady sellers, with multiple hulls launched in quick succession. It proved there was strong demand for a large composite Benetti. Benetti built it in a steady series, which helped keep delivery times and pricing predictable.
The design also showed how far the yard could push GRP construction in terms of size and volume. Its 471 GT are substantial for a fibreglass yacht. That combination of scale and series pricing gave the Diamond a clear place in the market. It became a reference point for buyers weighing composite against steel at this length. For many buyers that predictability matters as much as the volume itself.
Cassetta's classical hand
Giorgio M. Cassetta styled the exterior, giving the Diamond a poised, fairly classical profile in place of an aggressive one. Hand-finished detailing and clean bridge structures lend the boat a considered, timeless look. The proportions read as elegant and balanced across the three decks. It is a design meant to age gracefully rather than chase a trend. The three-deck profile reads as calm and confident from any angle.
The headline exterior space is the sun deck, reported at around 102 square metres, which the yard describes as the largest in its size category. That deck gives owners a vast area for dining and entertaining under the sky. The rest of the outdoor spaces are generous in keeping with the boat's volume. Cassetta's styling ties it all together with restraint. It gives owners a genuine outdoor room high on the boat.
Benetti's largest composite yacht brings metal-build volume to a fibreglass hull.
Volume for ten guests
The Diamond 44M accommodates up to 10 guests across five suites, with room for eight crew in five cabins. The interior benefits from the boat's beam of 9.16 metres, which opens up wide saloons and generous cabins. Owners can tailor the interior within the semi-custom framework to suit their taste. The volume on offer is a core part of the appeal. That beam is a big part of why the boat feels larger inside than its length suggests.
The layout follows a conventional tri-deck logic that owners and crew know well, which aids both living aboard and resale. Main-deck social space is ample, with private owner accommodation set apart. The finish meets the yard's established standard for the range. It is a practical, spacious interior in place of an experimental one. Crew areas are sized to run the boat properly on longer trips and charters.
GRP at flagship scale
The Diamond is built in fibreglass, riding on a displacement hull of 44.06 metres with a 9.16-metre beam and a draft near 2.31 metres. Twin MAN V12 diesels of 1,400 hp each give a top speed around 15 knots and an economical cruise near 11 knots. Full-load displacement is around 340 tonnes. The boat is tuned for comfortable, efficient passage-making rather than speed. The modest cruising speed reflects a design built for range and comfort over pace.
Building a yacht of this volume in composite is itself the engineering story, requiring careful structural work to keep weight and stiffness in balance. Fuel and water capacities support extended cruising between ports. The systems follow proven Benetti semi-custom practice. Reliability and repeatability were clearly priorities in the design.
Who the Diamond 44M suits
The Diamond 44M suits an owner who wants large-yacht volume and a big sun deck without moving to a full-custom steel build. It offers series-build reassurance and a known cost base at a generous size. The classical Cassetta styling appeals to buyers who prefer elegance to edge. It works for both private use and charter. Charter operators have valued the deck space and guest volume the model provides.
In the market the Diamond competed with other 40-metre-plus semi-custom yachts, where its volume and deck space stood out. Benetti has since introduced the Class 44M on the same hull, with Cassetta again on the exterior, which points to the platform's staying power. A healthy number of Diamond hulls now exist, giving buyers brokerage options. For volume-focused owners, it remains a strong case. The arrival of the Class 44M underlines how well the base design has held up.
Design
- Exterior: Giorgio M. Cassetta (Cassetta Yacht Designers)
- Interior: Cassetta Yacht Designers (model design; individual hulls custom, e.g. 'INK' by Achille Salvagni)
- Naval architecture: Pierluigi Ausonio with Benetti
Who it is for: An owner who wants large tri-deck volume and a standout sun deck in an efficient composite semi-custom package rather than a custom steel build.