Review of Delta 25
Basic specs.
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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.
The boat is equipped with one cabin, 4 berths, a galley, 50.0 liter fresh water capacity and toilet facility.
The Delta 25 has been equipped with different engine alternatives.
Alternative 1:
The boat may be equipped with an inboard Volvo Penta D3 190 diesel engine at 190 hp (141 kW). Cruise speed is 30.0 knots. Max speed is 41.0 knots.
The transmission is a Z-drive aka sterndrive.
Alternative 2:
Delta 25 may be equipped with an inboard Chrysler 318 5.2L diesel engine at 225 hp (167 kW). Cruise speed is 25.0 knots. Max speed is 40.0 knots.
The transmission is a Z-drive aka sterndrive.
The fuel tank has a capacity of 136.0 liters (35 US gallons, 29 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.
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 6.5 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Delta 25 is about 116 kg/cm, alternatively 649 lbs/inch.
Meaning: if you load 116 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 649 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.
What is L/B (Length Beam Ratio)?
The l/b ratio for Delta 25 is 3.12.
Curiosities
In Denmark, you are required to have achieved a 'powerboat driving license' in order to sail a powerboat.
In this context a boat is considered a powerboat if:
Danish definition of a powerboat
Maintenance
When buying anti-fouling bottom paint, it's nice to know how much to buy.
The surface of the wet bottom is about 20m2 (215 ft2).
Based on this, your favourite maritime shop can tell you the quantity you need.
Note: If you use a paint roller you will need more paint than if you use a paintbrush.
This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.
Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.
We are always looking for new photos. If you can contribute with photos for Delta 25 (Levi) 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.