The Lagoon 400 2015 vs Lagoon 42 2022 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
On paper these two are close siblings in the size department — Lagoon 400 2015 at 39,4 ft versus Lagoon 42 2022 at 42,0 ft. Weight tells a clearer story for trailering families: the Lagoon 42 2022 tips the scales at 26 681 lbs — 4 150 lbs less than the Lagoon 400 2015 at 22 531 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
Both boats share a closely matched power ceiling — 29 hp for the Lagoon 400 2015 and 45 hp for the Lagoon 42 2022. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Lagoon 400 2015 carries 106 gallons versus 79 gallons in the Lagoon 42 2022. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 12 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Displacement is where these two sailboats genuinely part ways. The Lagoon 42 2022 displaces 26 681 lbs — a 4 150-lb difference over the Lagoon 400 2015 at 22 531 lbs. That gap separates two entirely different categories of sailing: the heavier boat is built for offshore passage-making and load-carrying, while the lighter hull rewards performance sailing and easier handling in lighter air.
Both boats draw a similar depth — 4,0 ft and 4,1 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.
The Lagoon 400 2015 uses fractional_rig_sloop rigging. For auxiliary power the Lagoon 42 2022 carries a 45-hp engine against 29 hp on the Lagoon 400 2015. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.
Bottom line: The Lagoon 42 2022 is the offshore and bluewater choice — at 26 681 lbs displacement and 42 ft it has the load capacity, range, and seakeeping for extended passages. The Lagoon 400 2015 at 22 531 lbs is the more nimble, accessible option — easier to single-hand and better suited to coastal and inland sailing.