Princess S66 for Sale

Princess S66 Specifications

The S66’s defining engineering feature is the Olesinski deep-V hull. Designed using Bernard Olesinski’s proprietary Hull & Hydro software and validated with computational fluid dynamics modelling, the hull carries a 21-degree deadrise at the transom — significantly more than the flatter-bottomed Italian competitors in this class. The deep-V form delivers superior rough-water performance, allowing the S66 to maintain speed in conditions that force lesser hulls to throttle back. Pronounced chines generate lift and deflect spray, while moulded spray rails and propeller tunnels improve efficiency and reduce running draft. The result is a hull that rewards experienced skippers with higher maintainable average speeds in a real-world seaway — a quality that matters far more to seasoned owners than the quoted top-speed figure achieved in flat calm.

Construction uses Princess’s resin infusion process, refined over two decades of continuous development. Non-crimp glass fabrics are laid in open moulds, sealed beneath an airtight membrane, and low-viscosity polyester and vinylester resins are drawn through the laminate by vacuum via a computer-controlled pipework network. The process achieves a 60:40 fibre-to-resin ratio — double the fibre content of traditional hand layup — producing stiffer, lighter, and stronger structures with improved cosmetic finish and lower VOC emissions. Below the waterline is solid resin-infused laminate; topsides use closed-cell foam-cored sandwich construction for additional rigidity and thermal insulation. This high-quality build process directly contributes to the S66’s performance credentials: the lighter construction allows the deep-V hull to plane more efficiently, improving both top speed and fuel economy.

The engine choice is straightforward. The S66 was designed around the MAN V12-1400 — a naturally aspirated 24.24-litre V12 diesel producing 1,400 horsepower per side at 2,300 RPM, with a maximum torque output that delivers effortless mid-range acceleration. Each engine weighs 2,270 kg dry, with a bore of 128 mm, stroke of 157 mm, and a compression ratio of 17.0:1. An alternative MAN V8-1200 option was available on later examples, producing 1,200 HP per side from a 16.16-litre V8 block. Princess optimised the hull form to maintain the 38-knot top speed with the smaller engine, but the V12 remains the preferred choice for its superior torque characteristics, smoother power delivery, and stronger resale value. Buyers evaluating used S66s should verify which engine is fitted — the V12 commands a meaningful premium in the brokerage market.

Performance & Handling

Speed: With the V12-1400 engines at half load, the S66 reaches 38 knots at wide-open throttle — a figure that places it at the sharp end of the sportbridge category and gives it a three-knot advantage over the Sunseeker 65 Sport Yacht. The suggested fast cruising speed of 30–36 knots is where the S66 truly excels: the deep-V hull settles into a composed, predictable running attitude with minimal bow rise, allowing the crew to maintain conversation without raised voices. At these speeds, crossings like Ibiza to Mallorca or Palm Beach to the Bahamas are completed in a couple of hours. At economy speed of 10–12 knots, the 4,100-litre fuel tank delivers approximately 300 nautical miles of range — adequate for Mediterranean coastal cruising between refuelling stops, though not suited to longer open-water passages.

Sea-keeping: The Olesinski deep-V hull is the S66’s most compelling engineering advantage. The 21-degree deadrise at the transom, combined with hull chines that generate lift while deflecting spray, allows the S66 to slice through head seas where flatter-bottomed competitors begin to slam and pound. The Seakeeper 9 gyro stabiliser — standard equipment — reduces roll by up to 95% at rest and substantially dampens roll underway, transforming the at-anchor experience from uncomfortable to genuinely relaxed. The combination of deep-V hull and gyro stabilisation means the S66 delivers a level of comfort and composure that belies its sport-yacht classification. Multiple owners report maintaining comfortable cruising speeds in conditions that would force competitors to slow down significantly. The stabiliser is controllable from both the lower helm and the sportsbridge via the Raymarine chart plotter screens, allowing the skipper to adjust stabilisation settings without leaving the upper deck.

Low-speed handling: The S66 uses conventional shaft drive with 5-bladed propellers and high-speed balanced rudders. Variable-speed bow and stern thrusters with a hold-function docking facility provide dual-station close-quarters control, allowing the skipper to manoeuvre from either the lower helm or the sportsbridge. This gives competent low-speed handling in Mediterranean stern-to berthing situations, though the boat lacks the integrated joystick docking system that comes standard on IPS-equipped competitors like the Sunseeker 65 Sport Yacht. For owners who berth in particularly tight marinas, aftermarket Dockmate wireless remote systems have been successfully fitted to S66s, providing untethered docking control from the swim platform or quayside. The electro-hydraulic telescopic passerelle (3.5 metres) simplifies stern-to berthing and provides secure quayside access for guests.

Noise and vibration: Princess has invested heavily in NVH engineering across the S-Class range. The resin-infused construction, engine mounting on resilient mounts, foam-cored topsides, and careful bulkhead isolation contribute to a remarkably quiet cabin environment for a shaft-driven yacht. The MAN V12 engines are inherently smoother than smaller displacement powerplants, and the 5-blade propeller configuration reduces cavitation and vibration compared to 3- or 4-blade alternatives. At cruising speed, the S66 maintains a cabin noise level that allows normal conversation — a quality that experienced owners appreciate on longer passages where engine drone can become fatiguing. The sportsbridge benefits from the open-air environment, where wind noise naturally masks mechanical sound, making it the preferred helm station for spirited driving.

Interior Layout & Comfort

The S66’s interior design represents a collaboration between Princess’s in-house design studio and Pininfarina, the legendary Italian design house whose portfolio includes the Ferrari Enzo and Maserati GranTurismo. This partnership, which extends across the Princess range, brings an Italian eye for proportion and material selection to the British builder’s engineering-led approach. The result is an interior that avoids both the conservatism of traditional British yacht interiors and the visual excess that can characterise Italian competitors. Surfaces are finished in satin-lacquered walnut with V-groove detailing, extending from the saloon through the galley and into the lower-deck accommodation. High-end customisation is available through partnerships with Fendi Casa, Armani Casa, and Missoni Home, allowing buyers to specify bespoke material palettes from some of the world’s most prestigious interior design houses.

Main deck: The galley-aft saloon arrangement is the heart of the S66’s social space. The galley sits aft, connected to the cockpit through a fully removable window that transforms the galley worktop into an al fresco serving bar when entertaining at anchor. Sliding glass doors open the saloon to the aft cockpit, while the electro-hydraulic retractable sunroof floods the forward section with natural light. The saloon houses a leather U-shaped sofa to port, a dining table with sofa seating to starboard, and a 50-inch LED television on a powered lift connected to a Fusion Apollo RA-770 audio system with Blu-ray player and four Focal speakers. The galley itself is fully equipped with a full-height fridge-freezer, stainless steel sink, four-zone ceramic hob, and convection oven — sufficient for serious meal preparation rather than mere reheating. Wrap-around curved windows in the hardtop provide panoramic views from every seat in the saloon.

Lower deck: The S66’s four-cabin layout is a significant achievement for a sport yacht of this size and represents a genuine competitive advantage. The full-beam master stateroom sits amidships — the most stable part of the hull — featuring deep hull-side knife-insert windows that flood the cabin with natural light, a large double bed, wardrobes, a dressing table with chair, a loveseat with side tables, and a lavish en-suite bathroom with a walk-in waterfall shower. A 43-inch LED television is mounted opposite the bed. The forward VIP cabin provides a double berth with overhead deck hatch, wardrobe, dressing table, 32-inch LED television, and en-suite bathroom. A starboard guest cabin offers two single berths with powered conversion to a double, wardrobe, and en-suite bathroom with day access. The fourth cabin provides bunk berths suitable for children or additional guests. An optional single-berth crew cabin is accessible from the transom, providing independent crew access without disturbing guests.

Cockpit and exterior: The aft cockpit features U-shaped seating surrounding a teak dining table, with a wet bar connecting to the galley through the removable window. The cockpit leads aft to a spacious sunpad positioned over the tender garage, which accommodates a Williams 325 jet tender (3.3 metres). The hydraulic bathing platform deploys to water level, creating a beach club area for swimming and watersports access. Forward, a dedicated foredeck seating area provides a quieter social zone away from the cockpit activity, with sculpted sunpads and integrated grab rails for safe passage along the side decks.

Climate and systems: Full reverse-cycle air conditioning is fitted throughout, powered by the Onan 19 kW generator. The system provides both heating and cooling, making the S66 a viable year-round cruiser in temperate climates. Additional standard equipment includes Lumishore SMX53 underwater lighting (four units at the transom, two per side on the aft hull), deck-level lighting illuminating the side decks and foredeck, an electrically operated sun awning over the aft cockpit, and full Raymarine navigation electronics including radar, AIS transponder, and a rear docking camera. The helm station features power-assisted steering with all engine instrumentation replicated on both the lower and sportsbridge helms.

Ownership & Running Costs

The Princess S66 sits in the premium sport-yacht segment, with ownership costs reflecting the quality of the build, the twin MAN V12 engine installation, and the complexity of the onboard systems. As a recently discontinued model with production running from 2019 to 2024, the S66 benefits from modern systems, readily available parts, and strong manufacturer support through the Princess dealer network.

• New pricing (when in production): Princess does not publicly list prices. Based on competitive positioning and broker sources, the S66 listed at approximately GBP 2.0–2.8 million depending on specification, with well-optioned examples approaching GBP 3.0 million. The base price typically included the MAN V12-1400 engines, Seakeeper 9, and comprehensive navigation electronics.
• Used market (2021–2024): Recent examples with low hours (under 300) are listed at USD 2.5–3.0 million. A 2022 model with full specification was recently listed at USD 2,950,000 in the United States. European examples typically list at EUR 2.0–2.8 million depending on year, hours, and equipment level.
• Used market (2019–2020): Earlier examples with moderate hours (300–600) trade from approximately USD 1.1–1.7 million, with Turkish and Eastern Mediterranean listings at the lower end and US/Northern European examples commanding higher prices due to specification levels and maintenance standards.
• Annual operating costs: Insurance at 1–2% of hull value (GBP 20,000–50,000); marina berth GBP 15,000–40,000 (varies dramatically by location — a 20-metre berth in Palma de Mallorca costs approximately EUR 25,000, while Porto Cervo commands EUR 45,000+); twin MAN V12 engine servicing GBP 10,000–18,000; Seakeeper 9 annual service GBP 2,000–3,500; hull maintenance and antifouling GBP 5,000–12,000; fuel at 100 hours of cruising GBP 40,000–55,000; generator servicing GBP 1,500–2,500; winter storage and recommissioning GBP 5,000–12,000. Budget 7–10% of current market value annually as a realistic total.

The S66’s value retention is strong relative to the broader 60–70 ft sport yacht segment. Princess yachts generally demonstrate predictable depreciation patterns: steep in the first three years (15–25% cumulative), then settling to approximately 5–8% annually through years four to ten. The S66 benefits from limited production numbers, strong brand recognition, and a four-cabin layout that widens the pool of potential buyers on the secondary market. Complete MAN service records and documented Seakeeper maintenance add 10–15% to resale values compared to equivalent boats with incomplete documentation.

The MAN V12-1400 is a well-proven marine diesel with a strong global service network and excellent parts availability. The common-rail fuel injection system is sophisticated but thoroughly supported by authorised MAN Marine service centres in every major yachting region. For used purchases, prioritise boats with documented MAN service history and fewer than 1,000 engine hours. The shaft drive system is mechanically simpler and cheaper to service than IPS pod drives, with fewer proprietary components and more universal repair options — a practical advantage for owners who cruise in regions with limited specialist service infrastructure.

How to Buy a Princess S66

Understanding the S-Class position: The S66 occupies a specific niche within the Princess range that buyers must understand before committing. It is not a flybridge yacht — the sportsbridge provides elevated helming and social space but lacks the enclosed accommodation and full-service galley of the F-Class flybridge range. It is not a pure sport cruiser — the sportsbridge adds windage, weight, and complexity that the V-Class avoids. The S66 is the right choice for owners who want to drive from an elevated open-air helm station, entertain on two levels, and still maintain the low, aggressive profile of a sport yacht. If your priority is maximum interior volume, the F-Class is the better fit. If you want the purest sport-cruiser experience, the V-Class delivers it.

The S-Class lineup: During the S66’s production period, Princess offered the S-Class in three sizes: the S62 (18.93 m), the S66 (20.32 m), and the S72 (22.41 m). The S62 shares the S66’s design language in a more compact package with three cabins instead of four, while the S72 adds length, volume, and a larger sportsbridge at a substantially higher price point. For buyers who want the S-Class experience with the best balance of accommodation, performance, and value, the S66 represents the heart of the range.

Key Considerations for Buyers

• Engine specification: Verify whether the MAN V12-1400 or V8-1200 is fitted. The V12 delivers superior torque, smoother power delivery, and significantly stronger resale value. While Princess engineered the later hull to maintain 38 knots with the V8, the V12 remains the preferred powerplant. V12-equipped boats command a 10–15% premium in the brokerage market.
• Seakeeper service history: The Seakeeper 9 is an integral part of the S66 experience. Confirm the stabiliser has been serviced annually by an authorised Seakeeper technician. The gyro unit contains a high-speed flywheel operating in a vacuum enclosure — neglected maintenance can lead to costly rebuilds. A functioning Seakeeper transforms the S66’s at-anchor comfort; a failed unit significantly diminishes the ownership experience and the boat’s resale value.
• Hull and gelcoat condition: Princess resin-infused hulls have an excellent reputation — no significant osmosis issues are documented on S-Class models. Inspect for impact damage to the deep-V hull form, particularly around the bow and keel area. Check gelcoat condition on the topsides, paying attention to crazing around stress concentration points such as window corners and deck hardware mounting points.
• Hydraulic systems: Test every hydraulic function during the sea trial: bathing platform deployment and recovery, tender garage operation, passerelle extension and retraction, sunroof opening and closing. Listen for unusual noises, check for leaks at cylinder seals, and verify smooth operation at full speed. Hydraulic pump or ram replacement on a yacht of this complexity can cost GBP 3,000–8,000 per component.
• Electronics and systems age: The S66 uses Raymarine navigation electronics. Verify that all MFD screens, radar, AIS, and autopilot function correctly. On 2019–2020 models, check whether electronics have been updated — marine electronics technology advances rapidly, and 5–7-year-old systems may benefit from upgrading. Budget GBP 15,000–30,000 for a comprehensive electronics refresh if required.
• Crew cabin configuration: The optional crew cabin with transom access is a valuable specification for owners who employ a skipper or crew member. Boats specified without the crew cabin typically have additional storage in that space. Verify the configuration before purchase — retrofitting a crew cabin is impractical and costly.

The S66 is a boat that rewards careful buying. The hull construction is robust, the MAN engines are proven, the Seakeeper stabilisation is transformative, and the deep-V ride quality is genuinely class-leading. Commission a full mechanical, electrical, and structural survey from a qualified marine surveyor experienced with Princess yachts. Insist on a sea trial at multiple speeds, testing the transition from displacement to planing, cruising stability, engine synchronisation, and thruster performance. The right S66, properly maintained and correctly specified, delivers an ownership experience that few sport yachts in this segment can match.

Princess S66 vs Competitors

The 65-foot sportbridge and sport yacht segment is intensely competitive, with established offerings from British, Italian, and German builders. The S66’s competitive position rests on its four-cabin layout, deep-V hull performance, Seakeeper gyro stabilisation, and the engineering precision that defines Princess’s Plymouth-built approach to motor yacht construction.

Princess S66 vs Sunseeker Predator 55

The Sunseeker Predator 55 represents the more compact, pure-sportscruiser alternative from Princess’s Poole-based rival. The Predator 55 is approximately 11 feet shorter and sits in a lower price bracket, making this a cross-shopping comparison for buyers deciding between a larger sportbridge and a smaller, more agile sport cruiser. The Sunseeker offers bolder styling, aggressive proportions, and the driving-focused character that defines the Predator name. The S66 counters with significantly more interior volume, four cabins versus two or three, the sportsbridge social area, Seakeeper stabilisation as standard, and substantially more engine power. For buyers who prioritise accommodation and versatility, the S66 is the clear choice. For those who want a nimbler, sportier package at a lower price point, the Predator 55 delivers a more visceral driving experience.

Princess S66 vs Azimut S6

The Azimut S6 is the Italian interpretation of the sportbridge concept, designed by Stefano Righini with liberal use of carbon fibre in the bathing platform, hardtop, and tender garage to save weight. At 18 metres (59 feet), the Azimut is shorter and narrower (4.75 m beam) than the Princess, and uses triple Volvo Penta IPS700 pod drives producing a combined 1,650 horsepower for a top speed of 35 knots. The S66 is faster (38 vs 35 knots), larger, accommodates more guests (8 vs 6 in four cabins versus three), and delivers superior rough-water performance from its deeper-V hull. The Azimut counters with IPS joystick docking as standard, improved fuel efficiency from the triple-pod configuration, lighter carbon-composite construction, and the Italian design flair that characterises Alberto Mancini interiors. The choice distils to British engineering rigour versus Italian design innovation — both are excellent yachts that approach the sportbridge brief from fundamentally different philosophies.

Princess S66 vs Pershing 8X

The Pershing 8X represents the pure-performance end of the sport yacht spectrum. Powered by twin MAN V12-1800 engines producing 3,600 HP total, the Pershing achieves a breathtaking 48+ knots — placing it in an entirely different performance category. At 25.40 metres it is also significantly longer, with three cabins accommodating six guests. The Pershing prioritises outright speed, aggressive Fulvio De Simoni styling, and the cachet of the Ferretti Group’s most performance-focused brand. The S66 is the more versatile yacht: slower at the top end but more practical for extended family cruising with its extra cabin, lower fuel consumption, Seakeeper stabilisation, and substantially lower annual running costs. The Pershing suits buyers for whom speed is the primary criterion; the S66 suits those who want the best all-round sportbridge package.

Princess S66 vs Fairline Targa 53 GT

The Fairline Targa 53 GT is the closest British competitor from the Oundle-based builder. The Targa 53 GT is smaller (16.24 m) and lighter, sitting in a lower price bracket, but shares the deep-V hull DNA and emphasis on rough-water sea-keeping that characterises British sport-yacht engineering. The Fairline offers Alberto Mancini exterior styling, a choice of IPS or shaft drive, and competitive performance. The S66 counters with four cabins versus three, the dedicated sportsbridge (the Targa uses a hardtop rather than a sportbridge), Seakeeper 9 as standard, and the scale and refinement of a 66-foot platform. For buyers stepping up from a 50-foot sport cruiser, the Targa 53 GT is the more accessible entry point; the S66 is the destination for those ready for a genuine 65-foot sportbridge experience.

For a full interactive depreciation comparison between the Princess S66 and competing models, visit the Hulls.io Market Intelligence tool.