Difference
between Petrol Engine VS Diesel Engine
Petrol
Engine
1.
Petrol engine takes a suitable mixture of
Petrol and Air during suction stroke.
2.
The compression ratio is approximately 6 to
10.
3.
It is easy to start a petrol engine, since it
has low compression ratio.
4.
Petrol engine have more over heating problem
due to low thermal efficiency.
5.
Maintenance cost of petrol engine is less.
6.
Running cost of petrol engine is high because
of high fuel cost.
7.
Petrol engine requires spark plug to ignite
the mixture of fuel.
8.
Such engines are usually light duty vehicles.
9.
Generally, Petrol engines are high speed
engines.
10. It’s
based on Otto cycle.
Diesel Engine
1. A diesel engine takes only air during
the suction stroke.
2. The compression ratio of diesel
engine is approximately 14 to 25.
3. Starting of diesel engine is difficult
due to high compression ratio.
4. These engines have less over heating
problem as compared to Petrol engine.
5. Maintenance cost is high, compared to
petrol engine.
6. Running cost of diesel engines is
less due to cheaper fuel.
7. A fuel injector injects fuel in spray
or fine atomise form, at temperature about 600 *C.
8. These engines are generally employed
with heavy duty engines.
9. These engines are low speed engines
as compared to petrol engines.
10. Diesel engine is based on Diesel
cycle.
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