Difference between 2 stroke and 4 stroke engine 2 Stroke diesel engine4 Stroke diesel engine 1. 2 Stroke diesel engine is used for main propulsion purpose 1. 4 Stroke diesel engine is used to produce electricity onboard ship. 2. 2 stroke engine gives one power stroke in one revolution of crankshaft.2. 4 Stroke diesel engine gives one power stroke in two revolution of the crankshaft. 3. 2 Stroke diesel engine require light flywheel.3. 4 Stroke diesel engine require heavy fly wheel. 4. 2 Stroke engine lube oil consumption is less. 4. 4 Stroke diesel engine lube oil consumption is more. 5. 2 Stroke engine cylinder liner has port.5. 4 Stroke engine does not have ports in cylinder liner. 6. 2 Stroke engine is crosshead type.6. 4 Stroke engine is trunk piston type.