Dufour 520 Grand Large Information, Review, Specs

Sailing Performance & Handling

The 520 Grand Large is defined by a high-stability hull characterized by a pronounced hard chine that runs well forward, providing significant form stability and increasing interior volume without compromising the waterplane. On the water, this translates to a boat that sails remarkably flat, a trait often praised in editorial sea trials. According to Cruising World, the vessel demonstrates surprising agility for a 50-foot cruiser, maintaining momentum in light air while feeling composed as the breeze builds.

The sail plan is versatile, typically featuring a 9/10 fractional rig with an optional self-tacking jib for ease of use, or a 108% overlapping genoa for those seeking more power in light-to-moderate conditions. The dual helm stations provide excellent sightlines, and the German mainsheet system allows the helmsman to control the most critical lines without leaving the wheel. While the Displacement/Length ratio suggests a heavy cruiser, the Felci-designed underwater profile—featuring a deep T-bulb keel and a high-aspect rudder—ensures the 520 feels responsive and tracks well, even when pressed hard on a reach.

Interior Comfort & Variations

The interior of the 520 Grand Large is where Dufour’s collaboration with Felci Yacht Design truly shines, emphasizing light, modularity, and high-end finishes. The yacht was offered in multiple configurations, ranging from a three-cabin/three-head layout ideal for private owners to a five-cabin/three-head version designed for the premium charter market. A hallmark of this model is the "Electronic Navigation Table," which can be lowered to become part of the salon seating, and a modular salon table that adjusts to various heights and widths depending on the number of guests.

One of the most celebrated features inherited and improved upon from the 512 is the outdoor galley. Hidden beneath the aft cockpit seats, the "plancha" grill and sink allow the chef to prepare meals while remaining part of the social action on the swim platform. This feature effectively extends the living space from the companionway all the way to the transom. Interior materials typically include Moabi or Oak veneers, and as noted in a review by Yachting World, the integration of LED lighting and large hull ports creates an ambiance that rivals semi-custom yachts.

Popular Mentions & Media

The Dufour 520 Grand Large garnered significant industry attention upon its release, earning a nomination for the prestigious European Yacht of the Year award in the "Family Cruiser" category. Its debut at the Cannes Yachting Festival solidified its position as a flagship for the brand during the transition to the Fountaine Pajot ownership era. The model is frequently cited in nautical media as a benchmark for how production builders can successfully integrate luxury lifestyle features—like the aft-deck "beach club" concept—into a performance-oriented sailing hull.

Known Issues & Buyer’s Checklist

Prospective buyers should approach a used 520 with a focus on its complex systems and high-load areas. While the build quality is generally robust, the following areas require specific attention:

• Swim Platform Mechanism: The 520 features a large, two-tier articulating swim platform. The hydraulic or electric actuators and the hinges should be inspected for smooth operation and signs of saltwater ingress, as this area is subject to constant submersion and heavy use.
• Sail Drive Maintenance: Most units are powered by a Volvo Penta engine with a sail drive. It is critical to verify the age of the rubber diaphragm seal (typically a 7-year replacement interval) and check for any signs of "milky" oil, which indicates a failing lower seal.
• Deck Hardware Bedding: Given the large number of flush-mounted hatches and recessed tracks, a moisture meter test around the deck organizers and windlass area is recommended to ensure the balsa core remains dry.
• Interior Joinery Wear: The modular furniture (specifically the moving nav station and folding salon table) involves complex tracks and hinges. Buyers should test these for "rattles" or misalignment that can occur after years of vibration at sea.

Community & Resources

Owners of the 520 Grand Large benefit from a robust international network. The Dufour Yachts Owners Association (DYOA) provides a technical platform for sharing maintenance tips and rigging modifications. Additionally, because the 520 shares many mechanical and structural components with the earlier 500 and 512 models, a wealth of communal knowledge exists regarding the Felci-designed hull and the specific Volvo Penta/Panda generator configurations often found on these vessels.

The Verdict

The Dufour 520 Grand Large is a standout choice for sailors who refuse to choose between a "sailor's boat" and a "entertainer's boat." It successfully bridges the gap with a hull that is faster than its beam suggests and a cockpit that functions as a true outdoor living room.

Pros:

• Innovative Cockpit: The integrated aft-deck grill and fridge set a high standard for on-deck living.
• Sailing Manners: Exceptionally well-balanced at the helm thanks to the Felci hull design.
• Interior Light: Massive hull windows and multiple deck hatches create one of the brightest cabins in its class.
• Versatility: Modular furniture allows the interior to adapt from a passage-making mode to a dining-room mode in minutes.

Cons:

• System Complexity: High-spec versions with electric winches, generators, and articulating platforms require diligent maintenance.
• Size Constraints: At over 50 feet, it can be a handful in tight Mediterranean marinas without a bow thruster (though most came equipped with one).
• Production Finish: While stylish, some interior cabinetry lacks the heavy-duty robustness found in older, traditional cruisers.