Swan 46 Mk III vs Swan 54
How do the Swan 46 Mk III and Swan 54 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Swan 46 Mk III 
Swan 54 | Swan 46 Mk III | Swan 54 | |
|---|---|---|
| Length overall | 46.6 ft14.20 m | 47.2 ft14.40 m |
| Waterline length | 39.6 ft12.06 m | 47.2 ft14.40 m |
| Beam | 14.0 ft4.26 m | 15.6 ft4.75 m |
| Draft | 7.2 ft2.20 m | 8.0 ft2.44 m |
| Displacement | 32,408 lb14,700 kg | 48,502 lb22,000 kg |
| Ballast | 12,125 lb5,500 kg | 18,078 lb8,200 kg |
| Sail area | 1,179 ft²109.5 m² | 1,538 ft²142.9 m² |
| SA / Displacement | 18.56 | 18.50 |
| Displacement / Length | 234 | 205 |
| Comfort ratio | 35.8 | 41.0 |
| Capsize screening | 1.75 | 1.71 |
| Hull speed (kn) | 8.4 | 9.2 |
Swan 46 Mk III vs Swan 54: the short version
- The Swan 54 is the larger boat at 47.2 ft14.40 m LOA versus 46.6 ft14.20 m for the Swan 46 Mk III.
- The Swan 54 is heavier, displacing about 50% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Swan 46 Mk III carries the more powerful rig (18.6 vs 18.5), favouring lighter-air performance.
- The Swan 54 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Swan 54 rates better for offshore work (1.71 vs 1.75).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.