Answer Posted / abhishek kapuria

For 4 stroke :
a. Valves are used.
b. Heavy flywheel is used.
c. Thermal efficiency is high
d. For two revolution of crankshaft one power
stroke is produced.

For 2 stroke :
a. Ports are used.
b. Lighter flywheel used.
c. Thermal efficiency is low in comparison to $ stroke
d. For one revolution of crank shaft one power stroke is
produced

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