Tanks
One scale per liquid across every boat: a tank twice the height holds twice as much.
Bestevaer 42 S/Y
Fuel100 galWater100 gal14 gal of water per berth
Hallberg-Rassy 40C
Fuel106 galWater137 gal
Bestevaer 42 S/Y is 1.9 ft longer than Hallberg-Rassy 40C (4%). Bestevaer 42 S/Y draws the least water, 2.5 ft — 3 ft less than Hallberg-Rassy 40C.
Worked out from the published figures below — arithmetic, not opinion.
Dark icons are the standard layout; faded ones are what the larger layout adds.
Bestevaer
Bestevaer 42 S/Y
Sailing Monohull
Length : beam 3.3 : 1
Hallberg-Rassy
Hallberg-Rassy 40C
Sailing Monohull
Length : beam 3.1 : 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 | ![]() Bestevaer Bestevaer 42 S/Y | ![]() Hallberg-Rassy Hallberg-Rassy 40C |
|---|---|---|
| Overview | ||
| Brand | Bestevaer | Hallberg-Rassy |
| Model | Bestevaer 42 S/Y | Hallberg-Rassy 40C |
| 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 | Germán Frers Naval Architecture & Engineering |
| Dimensions | ||
| LOA | 44.8 ft | 42.8 ft |
| Hull length | Unknown | 40.4 ft |
| Beam | 13.7 ft | 13.7 ft |
| Draft | 2.5 ft–9.7 ft | 5.5 ft–6.3 ft |
| Displacement | 25,353 lb | 24,251 lb |
| Accommodation | ||
| Cabins | Unknown | 2 |
| Heads | 1 | Unknown |
| Berths | 6–7 | Unknown |
| Performance & Rig | ||
| Main sail | 495 ft² | Unknown |
| Jib | Unknown | Unknown |
| Genoa | 403 ft² | Unknown |
| Upwind sail area | Unknown | 1,040 ft² |
| Downwind sail area | Unknown | Unknown |
| Engine power | 40 hp | 60 hp |
| Engine count | 1 | 1 |
| Materials | ||
| Hull material | Aluminium | Unknown |
| Deck material | Unknown | Unknown |
| Mast material | Unknown | Unknown |
| Keel type | Unknown | lead on deep bilge |
| Rudder type | Unknown | Unknown |
| Sources |
10 of 11 figures here carry the builder's own words |
9 of 11 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.
Each boat's layouts, profiles and sail plans as its builder published them. Step through each column to line up the drawings you want to compare.
Hallberg-Rassy 40C

Hr40cinterior side view — Hallberg-Rassy
No drawings collected yet for Bestevaer 42 S/Y.
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.
Bestevaer 42 S/Y
14 gal of water per berth
Hallberg-Rassy 40C
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
Bestevaer 42 S/Y: mainsail + genoa, added up
Hallberg-Rassy 40C: published upwind sail area
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.
Hallberg-Rassy
Hallberg-Rassy 43 Mk IIISailing Monohull
Hallberg-Rassy
Hallberg-Rassy 43 Mk IISailing Monohull
Hallberg-Rassy
Hallberg-Rassy 43 Mk ISailing Monohull
Hallberg-Rassy
Hallberg-Rassy 42F Mk IISailing Monohull