Kirby 25 vs Mirage 30 SX
How do the Kirby 25 and Mirage 30 SX compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Kirby 25 
Mirage 30 SX | Kirby 25 | Mirage 30 SX | |
|---|---|---|
| Length overall | 25.2 ft7.67 m | 30.0 ft9.14 m |
| Waterline length | 20.8 ft6.32 m | 24.1 ft7.35 m |
| Beam | 8.8 ft2.67 m | 10.5 ft3.20 m |
| Draft | 4.2 ft1.27 m | 5.9 ft1.80 m |
| Displacement | 3,150 lb1,429 kg | 5,900 lb2,676 kg |
| Ballast | 1,150 lb522 kg | —— |
| Sail area | 289 ft²26.8 m² | 474 ft²44.0 m² |
| SA / Displacement | 21.52 | 23.23 |
| Displacement / Length | 157 | 188 |
| Comfort ratio | 12.3 | 15.4 |
| Capsize screening | 2.39 | 2.32 |
| Hull speed (kn) | 6.1 | 6.6 |
Kirby 25 vs Mirage 30 SX: the short version
- The Mirage 30 SX is the larger boat at 30.0 ft9.14 m LOA versus 25.2 ft7.67 m for the Kirby 25.
- The Mirage 30 SX is heavier, displacing about 87% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Mirage 30 SX carries the more powerful rig (23.2 vs 21.5), favouring lighter-air performance.
- The Mirage 30 SX scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Mirage 30 SX rates better for offshore work (2.32 vs 2.39).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.