The Beneteau First 21.7 Swing keel 2004 vs Beneteau Oceanis 350 1985 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 Oceanis 350 1985 measures 33,1 feet overall (1985), giving it roughly 12,1 additional feet of deck space compared to the Beneteau First 21.7 Swing keel 2004 at 21,0 feet (2004). Weight tells a clearer story for trailering families: the Beneteau Oceanis 350 1985 tips the scales at 10 582 lbs — 7 837 lbs less than the Beneteau First 21.7 Swing keel 2004 at 2 745 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 — 11 hp for the Beneteau First 21.7 Swing keel 2004 and 27 hp for the Beneteau Oceanis 350 1985. 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.

For family outings this is probably the sharpest distinction between the two. The Beneteau Oceanis 350 1985 is rated for 10 passengers, while the Beneteau First 21.7 Swing keel 2004 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau Oceanis 350 1985 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Beneteau Oceanis 350 1985 displaces 10 582 lbs — a 7 837-lb difference over the Beneteau First 21.7 Swing keel 2004 at 2 745 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 — 5,1 ft and 5,1 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.

The Beneteau First 21.7 Swing keel 2004 uses Sloop rigging. Helm style differs too: the Beneteau First 21.7 Swing keel 2004 uses a 1 tiller versus a 1 wheel on the Beneteau Oceanis 350 1985. Wheel helms give better leverage and visibility on larger boats; tillers offer direct feedback and simplicity on smaller ones. For auxiliary power the Beneteau Oceanis 350 1985 carries a 27-hp engine against 11 hp on the Beneteau First 21.7 Swing keel 2004. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.

The Beneteau First 21.7 Swing keel 2004 is trailerable, giving it a significant lifestyle advantage for sailors who want to move between lakes, rivers, and coastal waters without committing to a marina slip. Hull speed is rated at 7,3 knots for the Beneteau Oceanis 350 1985 and 6,0 knots for the Beneteau First 21.7 Swing keel 2004. For extended cruising, water capacity matters: the Beneteau Oceanis 350 1985 carries 79 gallons versus 9 gallons on the Beneteau First 21.7 Swing keel 2004 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.