BoatsJ J/40

J J/40

Fractional Sloop · Fin w/bulb & Spade Rudder · First built 2024

A 2024 Alan Johnstone fractional sloop featuring a high-performance fin keel and spade rudder configuration

Designed by Alan Johnstone.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/bulb & Spade Rudder

See her sail

The J J/40, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from SEILmagasinet

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

LivelySea-kindly

Her light displacement on a narrow beam gives 23 — a moderate, middle-of-the-road motion.

Comfort ratio 23
CoastalBluewater

1.98 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.98
LightHeavy

150 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 150
TenderStiff

38% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 38%

Light and lively — happiest day-sailing and coastal-hopping in settled weather.

  • Draws more than ~81% of boats her size on file

Compared with 2563 boats of the same type within a quarter of her length.

What the fleet has seen

The J J/40, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The J J/40 is a 2024 performance cruiser designed by Alan Johnstone, featuring a fractional sloop rig and a fin with bulb and spade rudder hull. With an LOA of 13.2 meters and a displacement of 7665 kg, it prioritizes sailing characteristics over interior volume. During sea trials off Palma de Mallorca, the J J/40 maintained speeds of 6 to 7 knots while beating in varying wind conditions.0:21 Its design includes lower freeboard and a narrower beam, contributing to balanced steering and responsive performance.1:08 The deck layout features a carbon mast and Harken hardware.2:18 The interior offers a functional galley and well-ventilated aft cabins, though the head is compact.2:46 The J J/40 performs well under a large gennaker and maintains stability when loaded for cruising.3:14 It received the European Yacht of the Year award in Düsseldorf.0:35

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen once across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

What they go for

Market signal

Where the fleet has seen this model come up for sale.

1seen for sale

  • The specific boat reviewed, with extras like a carbon mast and teak deck, is priced at 450,000 euros

    from SEILmagasinetseen April 20253:58

From the fleet's own footage — our observed signal, not broker listings.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
37.8%
Rig & sail area
Rig
Fractional Sloop
Ratios
Displacement / length
150.2
Comfort ratio
22.9
Capsize screening
1.98
Hull speed
8.1 kn
Pounds / inch immersion
1669
Hull
Hull type
Fin w/bulb & spade rudder
Construction
Composite/resin injection and infusion
Production
Years built
First built 2024
Designer
Alan Johnstone
Builder
J, Boats

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Landmark 4313.10 mSame hull familyNear-identical lengthA Mark Mills-designed fractional sloop with a high sail area-to-displacement ratio built for competitive performance
The Night Before the Night at KNS: Hot boats and the meaning of life3:33from SEILmagasinet
Beneteau 42313.15 mSame hull familyNear-identical lengthA masthead sloop featuring a fin keel with bulb and spade rudder, offered with both shallow and deep draft options
Don McIntyre & Jane - "2000 miles under Bimini" - Papeete to FIJI! on a 2003 Beneteau Oceanis 42320:23from Golden Globe Race Official
Grand Soleil 4413.10 mSame hull familyNear-identical lengthA deep-draft fractional sloop with a 2.65-meter keel, engineered for stability and speed in a 13-meter hull
Discover the Grand Soleil 44 Performance Yacht in Detailfrom 45 Degrees Sailing
Beneteau 4313.11 mSame hull familyNear-identical lengthA Berret-Racoupeau fractional sloop designed for comfortable cruising with a shallow draft and balanced performance
CONVERTING a 43´Beneteau INTO a 46´BENETEAU Oceanis SAILBOAT | Sailing Zephyr - Ep.176from Sailing Zephyr
Hunter Marine 42013.23 mSame hull familyNear-identical lengthA 42-foot cruiser with a performance-oriented fin keel and spade rudder, built for efficient coastal and offshore travel
We Got our Eyes on a SAILING CATAMARAN in the BOATYARD - Plus DIY Vietnamese PHO Boat Recipe - Ep 47from Sailing Jibsea
Ct-44 (Pilot House)13.16 mSame hull familyNear-identical lengthA Tanton-designed pilot house cutter featuring a fin keel and skeg-mounted rudder for offshore stability
How We Learned to Live on a Sailboat FULL TIME | (EP.030)12:11from Plan-Sea

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