BoatsLagoon 420

Lagoon 420

Catamaran, twin keels · Fractional Sloop · First built 2007

A Van Peteghem-Lauriot Prevost catamaran notable as the first series-produced sailboat with standard diesel-electric drives

Designed by Van Peteghem, Lauriot Prevost & Lauriot-Prevost.

LOA
Beam
Draft (max)
Displacement
Hull type
Catamaran Twin Keel

See her sail

The Lagoon 420, on the water

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

Footage from Sailing Doodles

Is it for you?

Character

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

LightHeavy

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

Displacement / length 109
EasygoingPowered-up

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

Sail area / displacement 20.4

What the fleet has seen

The Lagoon 420, as the fleet has seen it

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

The Lagoon 420 is a 12.6-meter fractional sloop catamaran with a twin keel hull, designed by Van Peteghem, Lauriot Prevost, and Lauriot-Prevost, and built by Lagoon Catamaran from 2007. Introduced at the Annapolis Boat Show in October 2006, it was advertised as the first series-produced sailboat with diesel-electric drives as standard equipment.4:11 The model, with a 7.5-meter beam and 1.3-meter draft, was offered in owner or charter versions and later updated as the Lagoon 421 before being replaced by the 2015 Lagoon 42. Aboard a Lagoon 421, Sailing Doodles encountered a faulty electrical connection requiring a manual bypass of the ignition switch to start the engines.2:03 The crew also managed a stiff headsail furling drum and a main halyard that wrapped around the shroud during a 12-mile transit in Belize.3:14 The Lagoon 420 Hybrid model faced scrutiny for reliability issues and undersized wiring, leading to its program cancellation.8:07

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

The record

Full specifications

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

Dimensions
Weights
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
20.4
Displacement / length
109.2
Hull
Hull type
Catamaran Twin Keel
Construction
Fiberglass
Production
Years built
First built 2007
Units built
270
Designer
Van Peteghem, Lauriot Prevost, Lauriot-Prevost
Builder
Lagoon Catamaran

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.

Island Spirit 41012.63 mSame hull familyNear-identical lengthA high-performance fractional sloop catamaran from Albatross Marine Design, featuring a 24.24 SA/displacement ratio
Lagoon 41012.37 mSame hull family0.2 m shorterA French-built fractional sloop catamaran designed by VPLP to succeed the US-built Lagoon 42
Lagoon 4212.95 mSame hull family0.4 m longerA Van Peteghem and Lauriot-Prevost catamaran featuring a versatile fractional rig with a staysail for offshore cruising
Neel 4313.11 mSame hull family0.5 m longerA 13.11-metre trimaran with a fixed unballasted keel and a high 24.02 sail area-to-displacement ratio
Dragonfly 4012.40 mSame hull family0.2 m shorterA high-performance swing-wing trimaran featuring carbon-fiber construction and a high sail-area-to-displacement ratio
Dazcat 129512.95 mSame hull family0.4 m longerA high-performance Darren Newton-designed catamaran with a powerful 29.47 SA/displacement ratio for rapid passage making

The family

Boats like this

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

Keep asking

The fleet has more to say

Search what's been said about the Lagoon 420, or ask a specific question — the answer comes back written out, with links to the moments it draws on.

The newsletter

New boats, new stories. Every week, everywhere.

One email from the fleet — boats newly added, videos newly analysed. No noise.

Report an issue