The Beneteau First 310 1990 vs Beneteau First 435 1984 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 435 1984 measures 44,7 feet overall (1984), giving it roughly 13,6 additional feet of deck space compared to the Beneteau First 310 1990 at 31,1 feet (1990). Weight tells a clearer story for trailering families: the Beneteau First 435 1984 tips the scales at 23 810 lbs — 15 653 lbs less than the Beneteau First 310 1990 at 8 157 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 Beneteau First 310 1990 carries a rated maximum of 18 hp. Engine data for the Beneteau First 435 1984 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Beneteau First 435 1984 carries 52 gallons versus 17 gallons in the Beneteau First 310 1990. 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 435 1984 is rated for 13 passengers, while the Beneteau First 310 1990 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau First 435 1984 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Beneteau First 435 1984 displaces 23 810 lbs — a 15 653-lb difference over the Beneteau First 310 1990 at 8 157 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.

Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Beneteau First 435 1984 draws 7,6 ft, compared to 6,0 ft for the Beneteau First 310 1990. That 1,6-foot difference affects which anchorages you can access, which haul-out facilities will take you, and how carefully you need to read the tide tables in shallower cruising grounds.

The Beneteau First 310 1990 uses Sloop rigging. Helm style differs too: the Beneteau First 310 1990 uses a 1 tiller versus a 1 wheel on the Beneteau First 435 1984. Wheel helms give better leverage and visibility on larger boats; tillers offer direct feedback and simplicity on smaller ones. The Beneteau First 310 1990 has a documented auxiliary engine of 18 hp.

Hull speed is rated at 8,1 knots for the Beneteau First 435 1984 and 7,2 knots for the Beneteau First 310 1990. For extended cruising, water capacity matters: the Beneteau First 435 1984 carries 127 gallons versus 45 gallons on the Beneteau First 310 1990 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.