The Beneteau First 405 1985 vs Beneteau First 47.7 1999 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 Beneteau First 47.7 1999 measures 48,1 feet overall (1999), giving it roughly 8,0 additional feet of deck space compared to the Beneteau First 405 1985 at 40,1 feet (1985). Weight tells a clearer story for trailering families: the Beneteau First 47.7 1999 tips the scales at 26 687 lbs — 8 168 lbs less than the Beneteau First 405 1985 at 18 519 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 100 hp, the Beneteau First 47.7 1999 has a 50-hp advantage over the Beneteau First 405 1985's 50-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Beneteau First 47.7 1999 carries 62 gallons versus 34 gallons in the Beneteau First 405 1985. 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 Beneteau First 47.7 1999 is rated for 14 passengers, while the Beneteau First 405 1985 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau First 47.7 1999 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Beneteau First 47.7 1999 displaces 26 687 lbs — a 8 168-lb difference over the Beneteau First 405 1985 at 18 519 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 — 7,1 ft and 7,8 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.

The Beneteau First 405 1985 uses Sloop rigging. For auxiliary power the Beneteau First 47.7 1999 carries a 100-hp engine against 50 hp on the Beneteau First 405 1985. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.

Hull speed is rated at 8,6 knots for the Beneteau First 47.7 1999 and 8,0 knots for the Beneteau First 405 1985. For extended cruising, water capacity matters: the Beneteau First 47.7 1999 carries 164 gallons versus 106 gallons on the Beneteau First 405 1985 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.