The Beneteau First 21.7 Swing keel 2004 vs Beneteau First 45 2007 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 45 2007 measures 46,2 feet overall (2007), giving it roughly 25,2 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 First 45 2007 tips the scales at 25 485 lbs — 22 740 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.

The power gap is worth calling out. Rated to 54 hp, the Beneteau First 45 2007 has a 43-hp advantage over the Beneteau First 21.7 Swing keel 2004's 11-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

For family outings this is probably the sharpest distinction between the two. The Beneteau First 45 2007 is rated for 14 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 First 45 2007 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Beneteau First 45 2007 displaces 25 485 lbs — a 22 740-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.

Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Beneteau First 45 2007 draws 7,1 ft, compared to 5,1 ft for the Beneteau First 21.7 Swing keel 2004. That 2,0-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 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 2 wheels on the Beneteau First 45 2007. Wheel helms give better leverage and visibility on larger boats; tillers offer direct feedback and simplicity on smaller ones. For auxiliary power the Beneteau First 45 2007 carries a 54-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 8,4 knots for the Beneteau First 45 2007 and 6,0 knots for the Beneteau First 21.7 Swing keel 2004. For extended cruising, water capacity matters: the Beneteau First 45 2007 carries 151 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.