Nautor 43 vs Swan 391
How do the Nautor 43 and Swan 391 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Nautor 43 
Swan 391 | Nautor 43 | Swan 391 | |
|---|---|---|
| Length overall | 31.5 ft9.60 m | 33.1 ft10.08 m |
| Waterline length | 31.5 ft9.60 m | 33.1 ft10.08 m |
| Beam | 13.8 ft4.22 m | 12.4 ft3.79 m |
| Draft | 5.9 ft1.80 m | 7.2 ft2.19 m |
| Displacement | 33,069 lb15,000 kg | 18,900 lb8,573 kg |
| Ballast | 9,040 lb4,100 kg | 6,800 lb3,084 kg |
| Sail area | 832 ft²77.3 m² | 767 ft²71.3 m² |
| SA / Displacement | 12.92 | 17.30 |
| Displacement / Length | 472 | 233 |
| Comfort ratio | 49.0 | 30.8 |
| Capsize screening | 1.73 | 1.87 |
| Hull speed (kn) | 7.5 | 7.7 |
Nautor 43 vs Swan 391: the short version
- The Swan 391 is the larger boat at 33.1 ft10.08 m LOA versus 31.5 ft9.60 m for the Nautor 43.
- The Nautor 43 is heavier, displacing about 75% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Swan 391 carries the more powerful rig (17.3 vs 12.9), favouring lighter-air performance.
- The Nautor 43 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Nautor 43 rates better for offshore work (1.73 vs 1.87).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.