Swan 39 vs Swan 40
How do the Swan 39 and Swan 40 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Swan 39 
Swan 40 | Swan 39 | Swan 40 | |
|---|---|---|
| Length overall | 31.5 ft9.60 m | 39.3 ft11.98 m |
| Waterline length | 31.5 ft9.60 m | 28.5 ft8.70 m |
| Beam | 12.5 ft3.81 m | 10.8 ft3.30 m |
| Draft | 7.2 ft2.19 m | 6.7 ft2.05 m |
| Displacement | 18,001 lb8,165 kg | 18,960 lb8,600 kg |
| Ballast | 7,900 lb3,583 kg | 7,900 lb3,583 kg |
| Sail area | 761 ft²70.7 m² | 709 ft²65.9 m² |
| SA / Displacement | 17.73 | 15.95 |
| Displacement / Length | 257 | 364 |
| Comfort ratio | 30.6 | 38.6 |
| Capsize screening | 1.91 | 1.62 |
| Hull speed (kn) | 7.5 | 7.2 |
Swan 39 vs Swan 40: the short version
- The Swan 40 is the larger boat at 39.3 ft11.98 m LOA versus 31.5 ft9.60 m for the Swan 39.
- On sail area/displacement the Swan 39 carries the more powerful rig (17.7 vs 16.0), favouring lighter-air performance.
- The Swan 40 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Swan 40 rates better for offshore work (1.62 vs 1.91).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.