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Sailboat Specifications

J40 Classic

Masthead Sloop · Fin W/Spade Rudder

Designed by Rodney S. Johnstone · Built by J Boats Tillotson Pearson (Usa) · First built 1984

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LOA 40.00 ft  ·  Beam 12.17 ft  ·  Displacement 18,000.00 lb  ·  Sail Area 765.00 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
About the J40 Classic Sailboat

Designed by Rodney S. Johnstone and built by J Boats/Tillotson Pearson from 1984 to 1993, this 40-footer represents a thoughtful balance between performance cruising and comfortable coastal sailing. With only 85 hulls produced during its nine-year run, the J40 Classic has developed a reputation as a well-built, versatile vessel that appeals to sailors seeking both spirited sailing characteristics and livable accommodations. The yacht's fin keel and spade rudder configuration, combined with a relatively high sail area-to-displacement ratio of 17.89, delivers responsive handling and good upwind performance. Her moderate displacement of 18,000 pounds and substantial ballast ratio provide stability without sacrificing sailing ability. The masthead sloop rig offers straightforward sail handling, making her suitable for both experienced couples and small crews. Built during J Boats' collaboration with Tillotson Pearson, the J40 Classic benefits from quality fiberglass construction and attention to detail. Her comfort ratio of 27.86 suggests she's oriented more toward performance than heavy cruising, while the capsize screening value of 1.86 indicates good stability for coastal and offshore passages. This combination makes her particularly well-suited for weekend cruising, club racing, and extended coastal exploration.

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Dimensions & Specifications
LOA (Length Overall) 40.00 ft / 12.19 m
LWL (Waterline Length) 34.00 ft / 10.36 m
Beam 12.17 ft / 3.71 m
Max Draft 6.50 ft / 1.98 m
Displacement 18,000.00 lb / 8,165 kg
Ballast 6,500.00 lb / 2,948 kg
Ballast Type Lead
Sail Area (Reported) 765.00 ft² / 71.07 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Rodney S. Johnstone
Builder J Boats Tillotson Pearson (USA)
First Built 1984
Last Built 1993
Number Built 85
Associations J/40 Owners
Related Sailboats C&C 40 · Santa Cruz 40 · Tartan 40 Offshore · Imx 40 · Hunter 40 1
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Engine & Accommodations
Engine Make Volvo
Engine Type Diesel
Horsepower 43
Fuel Capacity 33 gals / 125 L
Water Capacity 60 gals / 227 L
Frequently Asked Questions

What is the J40 Classic's sail area to displacement ratio?

The J40 Classic has a Sail Area to Displacement ratio (SA/D) of 17.89. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the J40 Classic's comfort ratio?

The J40 Classic has a Ted Brewer Comfort Ratio of 27.86. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the J40 Classic safe for offshore sailing?

The J40 Classic has a Capsize Screening Formula value of 1.86. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the J40 Classic?

The theoretical hull speed of the J40 Classic is 7.81 kn knots, calculated from its waterline length.

How much does a J40 Classic weigh?

The J40 Classic has a displacement of 18,000.00 lb and a length overall (LOA) of 40.00 ft.

Who designed the J40 Classic?

The J40 Classic was designed by Rodney S. Johnstone, first built in 1984.