It has an extremely strong body of copper silumin alloy.

The block was made from silumin and cylinder heads from aluminium.

They are also known as silumin.

Among the advantages of silumin is its high resistance to corrosion, making it useful in humid environments.

A long life is assured in a high-tensile, die-cast copper silumin aluminium alloy body.

Copper silumin aluminum alloy body.

The crankcase was cast from heat treated silumin alloy, with some minor parts using magnesium alloy.

The cylinders were made of KS (Kolbenschmidt) iron cylinder walls and were embedded in the Silumin alloy engine housing.