The Beneteau First 405 1985 vs Beneteau First 45F5 1990 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 45F5 1990 measures 46,7 feet overall (1990), giving it roughly 6,6 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 45F5 1990 tips the scales at 23 149 lbs — 4 630 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.

Both boats share a closely matched power ceiling — 50 hp for the Beneteau First 405 1985 and 50 hp for the Beneteau First 45F5 1990. 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 Beneteau First 45F5 1990 carries 42 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 45F5 1990 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 45F5 1990 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Beneteau First 45F5 1990 displaces 23 149 lbs — a 4 630-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 7,1 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.

The Beneteau First 405 1985 uses Sloop rigging.

Hull speed is rated at 8,1 knots for the Beneteau First 45F5 1990 and 8,0 knots for the Beneteau First 405 1985. For extended cruising, water capacity matters: the Beneteau First 45F5 1990 carries 172 gallons versus 106 gallons on the Beneteau First 405 1985 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.