Hull Design and Sailing Numbers
Robert Perry, reviewing the design for Sailing Magazine, called the displacement surprisingly low at 15,875 pounds for a boat of this length, yielding a displacement-to-length ratio of 191.6 — firmly in the moderate-performance range rather than the heavy-cruiser camp. The hull has a fast look with minimal bow overhang, and the broad stern, typical of French designs, carries enough counter aft to prevent the transom dragging at low speeds. Beam is generous but not exaggerated, preserving a length-to-beam ratio of 3.08. The result is a hull that promises decent light-air motion without the tender instability that can come with an ultra-beamy French floorstretcher.
Keel, Rudder, and Stability
The appendages are where the performance intent becomes most legible. The fin keel carries a relatively high aspect ratio and a long, low-VCG flattened bulb, putting ballast where it does the most work at the end of a long lever arm. Draft comes in at six feet five inches — enough to go upwind with authority, though it will exclude some shallow anchorages. The rudder is a bladelike spade, responsive and unencumbered. The ballast ratio of roughly 33 percent, combined with that low center of gravity, gives the 40 DS numbers that track closer to a performance cruiser than a comfortable wallower.
Rig and Handling
Jeanneau fitted the 40 DS with a standard two-spreader sloop rig with a slight sweep to the spreaders and forward lowers. The sail area-to-displacement ratio of 17.29 is, as Perry put it, just fine for a cruising boat — adequate to keep the boat moving in moderate conditions without overpowering an average crew offshore. The traveler is positioned very short and about as far forward as one would want, which Perry considered a limitation; he noted a preference for pad eyes at the aft corners of the cabinhouse combined with a solid mechanical vang to control the main, rather than relying on the short traveler for sail shape. The midboom sheeting arrangement drew his only real criticism of the sailplan. Cockpit ergonomics offered a genuine choice: the wheel could be mounted catamaran- and powerboat-style on the aft face of the cabintrunk, opening up the cockpit completely, or placed on a conventional center pedestal. Perry preferred the wheel aft for a boat of this performance character, allowing the helmsman to shift weight across tacks — though the bulkhead-mounted position does provide some protection from the raised cabinhouse.
The Raised Saloon and Interior Layouts
The cabinhouse is the defining polarizing feature of this boat. From deck level, the large, raised house reads as stocky; from below, it transforms the saloon entirely. Perry was candid about his aesthetic reservations but acknowledged that light and visibility below will make up for the challenging aesthetics. Jeanneau offered three interior configurations: a two-cabin owner's layout with a huge U-shaped galley, a three-cabin single-head arrangement with a separate shower area, and a three-cabin two-head version. All three were described as exceptional for long-range cruising. The forward cabin carries a double berth; there is a double quarter berth aft, and the option of a single quarter berth to starboard just aft of the galley. One acknowledged gap in the original drawings is the absence of a dedicated chart table; Perry noted that small seats with a table to port could work well as a nav station, which is a polite way of saying the navigation station is improvised rather than purpose-built.
Deck and Finish Quality
Whatever one makes of the cabinhouse profile, the execution of the deck itself is a Jeanneau hallmark. Perry described it as beautifully tooled and sculpted, with numerous hatches flooding the interior with light. The one ventilation compromise: few opening ports, a trade-off that owners in warm anchorages have historically noted. The twin-wheel arrangement — an original idea on a 40-footer — leaves the stern working area genuinely open, which pays dividends during docking and when handling dock lines in a busy marina.
Engine and Auxiliary Power
The 40 DS was offered with either a 40-horsepower or a 78-horsepower diesel auxiliary. Perry's guidance on this was unambiguous: go with the bigger engine. The reasoning is practical rather than theoretical — additional horsepower carries no downside in sloppy conditions or against a foul current, and nobody who has punched into a Mistral or motored upwind into the Mediterranean chop has ever wished for less power. The 40-horsepower option (roughly 39 hp in metric-trimmed examples) is adequate for harbor maneuvering but leaves little reserve in testing conditions.
The Verdict
The Sun Odyssey 40 DS is a coherent, purposeful design that succeeds at its stated brief: an interesting combination of both performance and comfort features on a hull light enough to sail with genuine verve. Daniel Andrieu's underwater form is the boat's strongest asset — the low displacement, high-aspect keel, and spade rudder give it handling that rewards an engaged helmsman. The raised saloon is a bold accommodation choice that pays off below decks even if it costs something topside in conventional good looks. Buyers who can look past the deckhouse profile and the improvised nav station will find a well-built French cruiser with real passage-making ability.
Pros
- Low displacement and high-aspect keel deliver genuine sailing performance for the size
- Twin helm stations leave the stern cockpit genuinely uncluttered
- Three interior layout options, all well-suited to extended offshore use
- Beautifully finished deck typical of Jeanneau production quality
- Wraparound raised saloon provides outstanding light and visibility below
Cons
- Large raised cabinhouse is visually divisive and may not appeal to traditional tastes
- Short, forward-mounted traveler limits mainsheet control and sail-shape options
- Few opening ports compromises ventilation in warm anchorages
- No dedicated chart table in the standard layout
- The base 40-horsepower engine option is marginal; the 78-hp upgrade is the better choice
