Main advantages and disadvantages between compression ignition and spark ignition engines?

A spark ignition engine is a gasoline engine. A compression ignition is a diesel engine.
basic difference between compression and spark ignition engine is ,

compression ignition is a diesel engine. spark ignition is a gasoline engine.

diesel engines compress the fuel to a point where the fuel explodes, thus giving ignition

gasoline does not compress to explosion, therefore it needs need a spark to ignite the fuel
spark ign. is gasoline. comp. ign. is diesel.
A compression ignition engine is typically a diesel. It compresses air so much that the heat from the compression is enough to cause the fuel to ignited once injected. A spark ignition engine is your average gasoline-burning car engine. It uses a spark plug to ignite the air/fuel mixture instead of relying on compretssion ignition.
A compression ignition engine uses very high compression of the air to heat it self up and the fuel is injected into the cylinder which self ignites (a diesel engine is a compression ignition engine).
A spark ignition engine uses a lower compression ratio and requires the use of a spark to ignite the fuel (a petrol engine is a spark ignition engine).
Because the oils used for a diesel have a higher calorific value, they have a better fuel economy, They also do not need extra energy usage to keep the engine running, unlike the energy that is lost to power the spark plugs from the generator/alternator which is taken from the useful energy produced by the engine.