Automobile Engineering in ME
The aluminium alloy is used in cylinder blocks because

Material cost is low
It does not require any cylinder liners
It is lighter and has good heat dissipation characteristics
The piston is also made of aluminium alloy

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Automobile Engineering in ME
A basic difference between the spark ignition engine and the Diesel engine is that the

All of these
Air temperature ignites the fuel in the Diesel engine
Diesel engine compresses air alone instead of an air-fuel mixture
Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke

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