what is the difference between diesel and petrol?

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Comparison chart

 

 DieselPetrol
Uses:In diesel engines, heating systemsIn petrol engines
Made from:Petroleum/ Crude oilPetroleum/ Crude Oil
Energy content:38.6 MJ/litre34.6 MJ/litre
Made by:Fractional distillationFractional distillation
Torque (for 10L engine):1000 Nm @ 2000 rpm300Nm @ 4000 rpm
Power (for 10L engine):490Hp @ 3500 rpm600Hp @ 5500 rpm
Power = torque*RPM:More torque at low speedsRuns at higher RPM
Auto-ignition temperature:210°C246°C
CO2 emission:More than gasoline. Diesel fuel produces approximately 13% more CO2 gas per gallon of fuel burned, compared to gas (petrol) engines.Lower than diesel.
Viscosity:increase at lower temperaturesNo change
US Consumption (2006):50 Billion gallons148 Billion gallons
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Conventional diesel and petrol are both produced from mineral oil, but using different refining methods. While diesel is in principle easier to refine than gasoline, it needs to be cleaned from more pollutants to ensure that tailpipe emissions remain as low as possible. However, diesel contains more energy than petrol and the vehicle’s engine combustion process is more efficient, adding up to higher fuel efficiency and lower CO2 emissions when using diesel.

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what is old stone age?

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