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

Answer 1

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.

Answer 2

Compression ignition or diesel engines produces more torque and normally will last longer, but cost more to build and the fuel is more expensive. Spark ignition or gasoline engines will produce more horsepower and are cheaper to build, fuel is cheaper to buy, but will not last as long or have as much pulling power.