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X4
Designer: Niels Jeppesen  ·  Builder: X-Yachts  ·  First built: 2019
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About the X4

Designed by the Danish yacht builder X-Yachts, the X4 sits within a lineage of performance-oriented sailboats that have earned a strong reputation among sailors who refuse to compromise between speed and comfort. X-Yachts has long been celebrated for producing boats with excellent build quality and responsive sailing characteristics, and the X4 continues that tradition. Well-suited for coastal cruising and spirited offshore passages, the X4 appeals to sailors who want a capable, well-mannered boat that rewards skilled helmsmanship without punishing beginners. The X4 reflects X-Yachts' hallmark philosophy of balancing performance with practicality, offering a hull form designed to generate good upwind and downwind performance across a range of conditions. Buyers often note the attention to detail in both the deck layout and interior finish, which speaks to the brand's Danish craftsmanship heritage. While detailed specifications may be limited, the X4's reputation within the X-Yachts family suggests a boat that will satisfy performance-minded cruisers looking for a reliable, engaging sailing experience. Prospective buyers are encouraged to consult an X-Yachts dealer for full specification details.

Core Dimensions
LOA (Length Overall) 39.67 ft / 12.09 m
LWL (Waterline Length) 34.12 ft / 10.40 m
Beam 12.50 ft / 3.81 m
Max Draft 6.89 ft / 2.10 m
Displacement 17,857.00 lb / 8,100 kg
Ballast 6,724.00 lb / 3,050 kg
Sail Area (Reported) 818.06 ft² / 76.00 m²
Headroom 6.17 ft / 1.88 m
Design & Construction
Hull Type Fin w/bulb & spade rudder
Rigging Type Fractional Sloop
Construction Epoxy/foam sand. w/E-glass
Designer Niels Jeppesen
Builder X-Yachts
First Built 2019
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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
19.23
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
26.69
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
1.92
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 7.83
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 1.0
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