The Lagoon 400 S2 2012 vs Lagoon 46 2019 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.

Size is the most obvious dividing line here. The Lagoon 46 2019 measures 45,1 feet overall (2019), giving it roughly 5,7 additional feet of deck space compared to the Lagoon 400 S2 2012 at 39,4 feet (2012). Weight tells a clearer story for trailering families: the Lagoon 46 2019 tips the scales at 34 723 lbs — 11 905 lbs less than the Lagoon 400 S2 2012 at 22 818 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.

The power gap is worth calling out. Rated to 57 hp, the Lagoon 46 2019 has a 28-hp advantage over the Lagoon 400 S2 2012's 29-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Lagoon 46 2019 carries 137 gallons versus 106 gallons in the Lagoon 400 S2 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Lagoon 46 2019 is rated for 13 passengers, while the Lagoon 400 S2 2012 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Lagoon 46 2019 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Lagoon 46 2019 displaces 34 723 lbs — a 11 905-lb difference over the Lagoon 400 S2 2012 at 22 818 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 4,5 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.

The Lagoon 400 S2 2012 is rigged as a fractional_rig_sloop while the Lagoon 46 2019 carries Sloop rigging — a meaningful difference in sail handling complexity, upwind performance, and the size of crew you'll need to work the boat comfortably. For auxiliary power the Lagoon 46 2019 carries a 57-hp engine against 29 hp on the Lagoon 400 S2 2012. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.