Dufour 425
Dufour · Umberto Felci · 2006
Updated
The Dufour 425 is a 12.60 m displacement racing yacht designed by Umberto Felci and built by Dufour, first launched in 2006. It races in Class B.
Length
12.60 m
41′ 4″
Beam
4.17 m
Draft
2.09 m
Displacement
8.8 t
Sail area
82 m²
On the podium
Where a Dufour 425 finishes when she goes racing.
On the podium
28%
of 18 starts by 3 boats
Wins
0%
Read from 18 starts by 3 boats between 2015 and 2018, counting races with six boats or more.
Recent regattas
The latest events where a Dufour 425 was on the start line, named as the organisers publish them.
Iop - A. Souli2018- Faliro-Poros Race2018
Vento de l'Alguer2017- Vento de l'Alguer2016
- Vento de l'Alguer2015
Raced one we are missing?
Report a regattaRound the buoys, or offshore
A short windward-leeward and a night at sea ask different things of a boat. Here is how this one does in each.
Round the buoys
—
Not enough data yet: 7 races of 10 NM or less carry a published distance.
Offshore & coastal
—
Not enough data yet: 9 races over 10 NM carry a published distance.
Who she races against
The designs a Dufour 425 actually lines up with, most often first. The bar shows how those meetings ended.
Also met, too few times for a figure:
First 345 (5 meetings), Elan 310 (5 meetings), J/24 (5 meetings), F&c 40 (3 meetings), Hanse 400e (3 meetings), Dufour 30 (3 meetings), Atlantic 31 (3 meetings), Bavaria 40 (2 meetings), Dehler 41 (Judel/Vrolijk) (2 meetings), Oyster 37 (2 meetings), First 35 (Berret) (2 meetings), Sun Fast 32 (2 meetings), Triton 48 (2 meetings), Oceanis 423 (2 meetings), First 38 (4 meetings), Dufour 36 (2 meetings), Oceanis 38 (Finot-Conq) (2 meetings), Sun Odyssey 37.1 (4 meetings), Oceanis 311 (2 meetings), Sun Odyssey 33.1 (2 meetings), Hallberg-rassy 41 (2 meetings), Carter 33 (2 meetings), Sun Odyssey 35 (2 meetings), First 30 (Berret) (2 meetings), Nereis 30 (2 meetings), Sun Odyssey 34.2 (2 meetings), A 31 (2 meetings), X-34 (2 meetings), X-332 (3 meetings), Dehler 33 (1 meeting), Finngulf 37 (1 meeting), Dufour 34 (1 meeting), Dehler 34 (Judel/Vrolijk) (1 meeting), Hanse 371 (1 meeting)
Some of the boats it races against
How the Dufour 425 has fared against each of them, boat against boat on corrected time. Ordered by how often the two meet, not by who wins.
Speed at every angle
The shape of this design's speed, drawn from the measured fleet. Pick a wind and watch it stretch.
Upwind VMG
5.66
39°
Beam reach
8.73
90°
Broad reach
9.36
135°
Downwind VMG
7.77
170°
Speed in knots at 20 knots of true wind. Green marks the angles that pay: the closest useful beat and the deepest run worth sailing.
Where it wins and where it pays
Every boat is judged against its own measurements — length, weight, sail area. The quicker those say it should be, the more it has to deliver just to break even. Going fast is not enough: it has to go faster than its own numbers promised.
This one is at home going to windward. Windward-leeward courses give it more of what it is good at than a coastal race does.
Where it gains
Its best ground is on the beam in moderate air, where it goes better than its measurements say it should, and by a margin worth having. It holds that advantage on the beat as well, so the gain is not down to one leg of the course.
Where it pays
It falls short downwind when it blows, giving away time it never gets back. That is a displacement hull working to its designed speed.
Above the line it delivers more than promised and gains on the fleet. Below, it falls short. Move the wind: plenty of boats sit on one side in the light and the other when it blows.
Full width is 0.6 kn either way.
At 10 knots this design makes back more than its rating asks on the beam reach.
How fast is a Dufour 425
Boat speed in knots, by true wind angle and wind strength.
| Angle | 6 kn | 10 kn | 14 kn | 20 kn |
|---|---|---|---|---|
| Beat VMG | 3.22 | 4.58 | 5.37 | 5.66 |
| 52° | 5.01 | 6.80 | 7.62 | 7.95 |
| 60° | 5.32 | 7.08 | 7.80 | 8.18 |
| 75° | 5.54 | 7.28 | 7.99 | 8.54 |
| 90° | 5.58 | 7.55 | 8.27 | 8.73 |
| 110° | 5.62 | 7.64 | 8.50 | 9.48 |
| 120° | 5.44 | 7.51 | 8.43 | 9.64 |
| 135° | 4.84 | 7.04 | 8.14 | 9.36 |
| 150° | 4.08 | 6.24 | 7.62 | 8.69 |
| Run VMG | 3.53 | 5.41 | 6.64 | 7.77 |
How they are set up
The range each sail spans across the fleet.
Nearly all carry a folding propeller. A bowsprit is standard across the fleet. Crew weight is declared around 690 kg.
Rigging
Dufour 425 rig and sail dimensions
A Dufour 425 carries 13.68 m of mainsail hoist on a 4.70 m boom, a forestay 14.75 m above the deck and a 5.12 m bowsprit. Typical figures across the 7 boats measured under the current VPP, with the range each one spans.
Rig
Sails
The spinnaker spreads widest of all — 87 to 148 m² depending on bowsprit and set-up. Before ordering a sail, read the figure on your own measurement record rather than the typical one for the design.