Grampian 28 vs Stuart Knockabout
How do the Grampian 28 and Stuart Knockabout compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Grampian 28 
Stuart Knockabout | Grampian 28 | Stuart Knockabout | |
|---|---|---|
| Length overall | 28.0 ft8.53 m | 28.0 ft8.53 m |
| Waterline length | 24.5 ft7.47 m | 22.8 ft6.96 m |
| Beam | 9.5 ft2.90 m | 6.9 ft2.11 m |
| Draft | 4.8 ft1.47 m | 5.5 ft1.68 m |
| Displacement | 6,900 lb3,130 kg | 4,000 lb1,814 kg |
| Ballast | 3,060 lb1,388 kg | 2,400 lb1,089 kg |
| Sail area | 384 ft²35.7 m² | 291 ft²27.0 m² |
| SA / Displacement | 16.95 | 18.48 |
| Displacement / Length | 209 | 150 |
| Comfort ratio | 20.8 | 19.3 |
| Capsize screening | 2.00 | 1.74 |
| Hull speed (kn) | 6.6 | 6.4 |
Grampian 28 vs Stuart Knockabout: the short version
- The Grampian 28 and Stuart Knockabout are close in length (28.0 ft8.53 m vs 28.0 ft8.53 m ).
- The Grampian 28 is heavier, displacing about 73% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Stuart Knockabout carries the more powerful rig (18.5 vs 17.0), favouring lighter-air performance.
- The Grampian 28 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Stuart Knockabout rates better for offshore work (1.74 vs 2.00).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.