BoatsNeptun 25-1

Neptun 25-1

Masthead Sloop · Fin keel, spade rudder · 1975–1983

A 7.6-metre fin-keel cruiser built from 1975 to 1983, balancing a stiff 32% ballast ratio with a lively sail plan

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin w/spade Rudder

Is it for you?

Character

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

TrailerableBeam 2.50 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 1,700 kg of hull, so roughly 2,300 kg on a trailer: check that against your own towing rating.
LivelySea-kindly

Her light displacement on a moderate beam gives 15 — a quick, lively motion that feels every wave.

Comfort ratio 15
CoastalBluewater

2.11 — right around the 2.0 line, the edge between coastal and offshore.

Capsize screening 2.11
LightHeavy

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

Displacement / length 147
EasygoingPowered-up

20.7 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 20.7
TenderStiff

32% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 32%

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

The record

Full specifications

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

Dimensions
Weights
Ballast / displacement
32.4%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
20.7
Displacement / length
147.5
Comfort ratio
15.1
Capsize screening
2.11
Hull speed
6.3 kn
Pounds / inch immersion
658
Hull
Hull type
Fin w/spade rudder
Construction
Fiberglass
Ballast type
Cast Iron
Production
Years built
1975–1983
Builder
Neptun Boote GmbH, Co. KG

Boats like this, on the water

Nobody has filmed this one — but these are close.

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.

Dehler Yachts 25CR7.50 mSame hull familyNear-identical lengthA Van de Stadt-designed fractional sloop with a high sail area-to-displacement ratio built for spirited performance
Don't Make The Same MISTAKE We Did [Ep.28]9:27from Sailing Oceanaire | Wik & Rox
Sirius 7277.27 mSame hull family0.3 m shorterA development of the Sirius 24, this fractional sloop features a fin keel with skeg-mounted rudder for balanced handling
Two Different Ways Sailing Changes Lives | #SAL #2510:15from Hashtag Sal
Jeanneau Sun Odyssey 24.27.30 mSame hull family0.3 m shorterA Jacques Fauroux-designed fractional sloop built for coastal cruising with a stable fin-and-bulb keel
Sailing under asymmetric spinnaker with a Sun Odyssey1:24from VOILIER ODIN
J Boats Tillotson Pearson J/247.32 mSame hull family0.3 m shorterA legendary Rodney Johnstone design that defined the modern one-design racer with its high sail-area-to-displacement ratio
Everything You Think About Sailing Is Wrong3:59from The Sailing Doodles Podcast
Maxi Yachts 777.70 mSame hull familyNear-identical lengthThe most popular model in the builder's history, offering both inboard and outboard engine options for versatile cruising
From Helsesista to Adventure Tale: How she found joy on the "high seas" in the Inner Oslo Fjordfrom SEILmagasinet
Martinique 257.70 mSame hull familyNear-identical lengthA Brazilian-built masthead sloop with a 44% ballast ratio, offering a stiff and stable platform for coastal cruising
The Day I Found My Sailboat, Balanço | #SAL Cut #513:35from Hashtag Sal

The family

Boats like this

Nearby designs by size, type, and era — worth a look alongside her.

Neptun 24A masthead sloop from the late sixties, featuring a fin keel and transom-hung rudder for coastal cruisingNeptun 26A lightweight 1970s cruiser with a 32% ballast ratio and a high sail-area-to-displacement profile for lively sailingNeptun 25-2A lightweight masthead sloop available with a swing keel, designed for versatile shoal-water cruisingNeptun 31An IOR-rated 9.3-metre fin-keel sloop from the early seventies, designed with a 33% ballast ratio for coastal stability

Keep looking

Nothing filmed of this one yet

Two ways to keep looking — both search what the fleet has actually recorded.

Search the fleet for boats like thisAsk the fleet about the Neptun 25-1

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