Petrol or Diesel?

"What is the difference between a Petrol and Diesel Engine?In petrol engines fuel is mixed with air and then forced into the
cylinders where the fuel-air mix is compressed by the pistons and
ignited by spark plugs. In a diesel engine the air is compressed
before the fuel is added to it. When air is compressed it heats up.
This means that when the fuel is added to the compressed air it is
very hot and the fuel-air mix ignites automatically. So there are no
spark plugs in a diesel engine as pressure is used to ignite the
fuel-air mix."

The Workings Of A Car Explained

"The process by which a car works is a lot simpler than you may think. When a driver turns a key in the ignition:

• The car battery powers up sending
• Power to the starter motor, which
• Turns the crankshaft, which
• Gets the pistons moving
• With the pistons moving the engine fires up and ticks over
• A fan draws air into the engine via an air filter
• The air filter removes dirt and grit from the air
• The cleaned air is drawn into a chamber where fuel (petrol or diesel) is added
• This fuel-air mix (a vaporised gas) is stored in the chamber
• The driver presses the accelerator pedal
• The throttle valve is opened
• The gas-air mix passes through an intake manifold and is distributed, through intake valves, into the cylinders. The camshaft controls the opening and closing of the valves.
• The distributor makes the spark plugs spark, which ignites the fuel-air mix. The resulting explosion forces a piston to move down which in turn causes the crankshaft to rotate."