What are the basic different between the petrol and diesel engine?

Answer 1

Well gasoline engines have a spark plug that ignites the gasoline as it is injected into the engine. Diesel engines have no spark plugs because the high compression ignites the fuel as it is injected. Because it releases higher energy density, diesels get better fuel economy.
The main difference between a diesel and a gasoline (petrol) engine are the way the fuel is ignited. In a gasoline engine, a fuel/air mixture is introduced into the cylinder either through a carburetor or fuel injection system, where it is then compressed and ignited with a spark. In a diesel engine, air is compressed in the cylinder which heats it to about 1000 degrees F (550 degrees C), then fuel is injected under high pressure and ignited by the superheated air. To accomplish this, diesel engines also have higher compression ratios than gasoline engines.

Answer 2

Petrol is what is taken out of the earth. Gasoline is a refined product; the petrol is actually separated (distillated) into several parts or "fractions", some of which basically have larger molecules, some smaller molecules; gasoline is one of those parts.

Answer 3

There is none. Petrol is the British term, and gas is the American term for the same thing.

Answer 4

Petrol engines use lower pressure and a correctly timed spark to ignite the fuel. Diesel uses high pressure to ignite. Diesel also uses a glow plug to start the com ustion process.