Tanks
One scale per liquid across every boat: a tank twice the height holds twice as much.
Allures 45.9
Fuel165 galWater111 gal14 gal of water per berth
GT6 Explorer
Fuel132 galWater79 gal
GT6 Explorer is 1.3 ft longer than Allures 45.9 (3%). Allures 45.9 draws the least water, 3.7 ft — 2.9 ft less than GT6 Explorer. Allures 45.9 has the lowest air draft, 64 ft; GT6 Explorer stands 7.9 ft taller.
Worked out from the published figures below — arithmetic, not opinion.
Dark icons are the standard layout; faded ones are what the larger layout adds.
Allures Yachting
Allures 45.9
Sailing Monohull
Length : beam 3.3 : 1
Elan
GT6 Explorer
Sailing Monohull
Length : beam 3.4 : 1
Length : beam is length divided by beam — the higher it is, the slimmer the hull. Multihulls read low by nature.
A figure marked with a quote mark was read from the builder's page. Open it for the exact line, the page and the date.
| Model | ![]() Allures Yachting Allures 45.9 | ![]() Elan GT6 Explorer |
|---|---|---|
| Overview | ||
| Brand | Allures Yachting | Elan |
| Model | Allures 45.9 | GT6 Explorer |
| Generation | Unknown | Unknown |
| Hull type | Sailing Monohull | Sailing Monohull |
| Propulsion | Sail | Sail |
| Production status | In production | In production |
| Production start year | Unknown | Unknown |
| Production end year | Unknown | Unknown |
| Designer | Unknown | Studio F. A. Porsche |
| Dimensions | ||
| LOA | 48.4 ft | 49.7 ft |
| Hull length | 44.9 ft | 47 ft |
| Beam | 14.5 ft | 14.7 ft |
| Draft | 3.7 ft–9.5 ft | 6.5 ft–8 ft |
| Displacement | 27,910 lb | 29,410 lb |
| Accommodation | ||
| Cabins | 2–3 | 2–3 |
| Heads | Unknown | 2 |
| Berths | 4–8 | Unknown |
| Performance & Rig | ||
| Main sail | 544 ft² | 674 ft² |
| Jib | Unknown | 550 ft² |
| Genoa | Unknown | Unknown |
| Upwind sail area | 1,012 ft² | Unknown |
| Downwind sail area | 1,249 ft² | 1,647 ft² |
| Engine power | 60 hp | 57 hp–80 hp |
| Engine count | 1 | 1 |
| Materials | ||
| Hull material | Aluminium | Unknown |
| Deck material | Composite | Unknown |
| Mast material | Aluminium | Unknown |
| Keel type | Integral centreboard | Unknown |
| Rudder type | Unknown | Unknown |
| Sources | Figures read fromallures.com/en/comparez-nos-modelesread 9/13/2026from the site's comparison table |
13 of 13 figures here carry the builder's own words |
Each boat's published length and beam seen from above, and its mast height and draft from the side, all drawn on one scale.
Outlines are schematic; the dimensions are the builder's.
What the builders publish about how fast, how strong and how far — each figure on one scale for every boat.
One scale per liquid across every boat: a tank twice the height holds twice as much.
Allures 45.9
14 gal of water per berth
GT6 Explorer
Classic yacht-design ratios worked out from each builder's published figures. They compare boats; they don't grade them.
How much sail the boat carries for its weight — its power in light air.
sail area (ft²) ÷ (displacement as ft³ of seawater)^⅔
Allures 45.9: published upwind sail area
GT6 Explorer: mainsail + jib, added up
How heavy the boat is for its waterline length. Lower is lighter and quicker; higher is steadier and roomier.
displacement (long tons) ÷ (0.01 × waterline length in ft)³
The share of the weight carried in the keel — a rough guide to stiffness, though how deep that weight sits matters as much.
ballast ÷ displacement × 100
Ted Brewer's measure of how gently a boat moves in a seaway. Higher means a slower, easier motion.
displacement (lb) ÷ (0.65 × (0.7 × LWL + 0.3 × LOA) × beam^1.333), lengths in ft
A guide from the inquiry after the 1979 Fastnet race: below 2 was taken as suited to ocean passages. It ignores hull shape and where the ballast sits.
beam (ft) ÷ (displacement as ft³ of seawater)^⅓
Roughly the speed a displacement hull reaches before it has to climb its own bow wave.
1.34 × √(waterline length in ft), in knots
Most builders publish a light displacement. The ratios were defined on a loaded boat, so every boat here reads a little lighter than a surveyor's figure would — all alike, which keeps them comparable.
The boats most like the ones above, by hull form, size and use.
Garcia Yachts
Garcia Exploration 45Sailing Monohull · 48.8 ft
X-Yachts
Xc 47Sailing Monohull · 49.9 ft
Island Packet Yachts
IP 439Sailing Monohull · 47 ft
Nautor Swan
Swan 48 MKIISailing Monohull · 51.8 ft