Review of Aluminia 86

Basic specs.

sail specifications
The Aluminia 86 is a sailboat designed by the German maritime architect K. A. H. Oehlmann together with Weikert. The Aluminia 86 is built by the German yard Weikert-aluminium-yachten.

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The hull is made of aluminium. Aluminum is strong and forgiving. Where an impact on a fiberglass hull will result in major gelcoat damage and possible cracking, an aluminum hull will probably only have a scratch or a small bend. The only concern is electrolysis. Ensure that you have proper sacrificial anodes installed.


The boat is equipped with 5 berths.


The boat can enter even shallow marinas as the draft is just about 0.60 - 0.70 meter (1.97 - 2.27 ft) dependent on the load. See immersion rate below.


Aluminia 86 is typically equipped with an inboard diesel engine at 14.0 hp (10 kW).

The transmission is a saildrive.

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 Aluminia 86 is 2.25, indicating that this boat would not 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 Aluminia 86 is about 144 kg/cm, alternatively 806 lbs/inch.
Meaning: if you load 144 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 806 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 Aluminia 86 is 3.44.

Wide Slim 88% 0 50 100
Compared with other similar sailboats it is slimmer than 88% of all other designs. It seems that the designer has chosen a significantly more speedy hull design.

SA/D (Sail Area Displacement ratio)

SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 25.19



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
Jib sheet 8.6 m(28.2 feet)10 mm(3/8 inch)
Genoa sheet8.6 m(28.2 feet)10 mm(3/8 inch)
Mainsheet 21.5 m(70.5 feet)10 mm(3/8 inch)
Spinnaker sheet18.9 m(62.1 feet)10 mm(3/8 inch)

Boat owner's ideas

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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