Swan 115 vs Swan 46 Mk III
How do the Swan 115 and Swan 46 Mk III compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Swan 115 
Swan 46 Mk III | Swan 115 | Swan 46 Mk III | |
|---|---|---|
| Length overall | 107.7 ft32.84 m | 46.6 ft14.20 m |
| Waterline length | 107.7 ft32.84 m | 39.6 ft12.06 m |
| Beam | 26.6 ft8.12 m | 14.0 ft4.26 m |
| Draft | 11.5 ft3.50 m | 7.2 ft2.20 m |
| Displacement | 203,928 lb92,500 kg | 32,408 lb14,700 kg |
| Ballast | 70,547 lb32,000 kg | 12,125 lb5,500 kg |
| Sail area | 7,025 ft²652.6 m² | 1,179 ft²109.5 m² |
| SA / Displacement | 32.44 | 18.56 |
| Displacement / Length | 73 | 234 |
| Comfort ratio | 37.0 | 35.8 |
| Capsize screening | 1.81 | 1.75 |
| Hull speed (kn) | 13.9 | 8.4 |
Swan 115 vs Swan 46 Mk III: the short version
- The Swan 115 is the larger boat at 107.7 ft32.84 m LOA versus 46.6 ft14.20 m for the Swan 46 Mk III.
- The Swan 115 is heavier, displacing about 529% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Swan 115 carries the more powerful rig (32.4 vs 18.6), favouring lighter-air performance.
- The Swan 115 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Swan 46 Mk III rates better for offshore work (1.75 vs 1.81).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.