Review of Alpa 825

Basic specs.

The Alpa 825 is a sailboat. The Alpa 825 is built by the Italian yard Alpa Cantieri.

Here we would have liked to show you nice photos of the Alpa 825.
If you have a photo you would like to share: Upload Image

Looking for a new boat? Find a Alpa 825 or similar boat for sale

Hull

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

Interior

The boat is equipped with one cabin, 4 berths, a galley and toilet facility.

Rig

The boat equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.

Keel

The Alpa 825 is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a long keel.

The boat can enter most marinas as the draft is just about 1.60 - 1.70 meter (5.25 - 5.55 ft) dependent on the load. See immersion rate below.

Engine

Alpa 825 is typically equipped with an inboard Vetus engine at 16.0 hp (11 kW).

The transmission is a shaft drive. A shaft drive will in the long run require less maintenence than other types of drive e.g. a sail drive.

The fuel tank has a capacity of 100.0 liters (26 US gallons, 21 imperial gallons).

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Alpa 825 is 1.68, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Alpa 825 is about 132 kg/cm, alternatively 742 lbs/inch.
Meaning: if you load 132 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 742 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Alpa 825 is 3.44.

Compared with other similar sailboats it is slimmer than 90% of all other designs. It seems that the designer has chosen a significantly more speedy hull design. This type of design is also referred to as 'needle'.

SA/D (Sail Area Displacement ratio)

What is SA/D (Sail Area Displacement ratio)?

The SA/D for Alpa 825 with ISO 8666 reference sail is 16.0, with a 135% genua the SA/D is 19.1.

The SA/D ratio indicates that it is faster than 50% of all similar sailboat designs in light wind.

Maintenance

Rig

Dimensions of sail for masthead rig.

Are your sails worn out? You might find your next sail here: Sails for Sale

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

**Guiding dimensions of running rig**
Usage	Length		Diameter
Mainsail halyard	24.3 m	(79.7 feet)	8 mm	(5/16 inch)
Jib/genoa halyard	24.3 m	(79.7 feet)	8 mm	(5/16 inch)
Spinnaker halyard	24.3 m	(79.7 feet)	8 mm	(5/16 inch)
Jib sheet	8.2 m	(27.1 feet)	10 mm	(3/8 inch)
Genoa sheet	8.2 m	(27.1 feet)	10 mm	(3/8 inch)
Mainsheet	20.6 m	(67.7 feet)	10 mm	(3/8 inch)
Spinnaker sheet	18.2 m	(59.5 feet)	10 mm	(3/8 inch)
Cunningham	3.2 m	(10.5 feet)	8 mm	(5/16 inch)
Kickingstrap	6.4 m	(21.0 feet)	8 mm	(5/16 inch)
Clew-outhaul	6.4 m	(21.0 feet)	8 mm	(5/16 inch)

Boat owner's ideas

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what to look for.

Finally

We are always looking for new photos. If you can contribute with photos for Alpa 825 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.

References

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.