Is the engine body aluminum and iron big?
In both cases, the aluminum engine is obviously inferior to the cast iron cylinder engine.
With the already elaborated volume on the conclusion, therefore, when the car's engine volume requirements are small, the use of aluminum cylinder is difficult to achieve the strength of cast iron cylinder.
It is well known that aluminum is susceptible to chemical reactions with water generated during combustion, and therefore corrosion resistance is far less than that of cast iron cylinders, especially for supercharged engines where temperature pressures are higher.
As the proportion of aluminum lighter, so the aluminum unit volume structure strength is less than cast iron, so the volume of aluminum cylinder is usually larger than the cast iron, it is difficult to achieve the compact and small size cast iron cylinder.
