The controversial subject of petrol versus diesel has been debated for many years. When you choose a new car, one of the biggest decisions you need to make is whether to opt for a petrol or diesel engine.
So what is the difference?
The chemical make-up of petrol differs from diesel. Diesel fuel is denser than petrol and contains as much as 13% more energy than an equivalent amount of petrol. There are also some differences in the methods used for burning petrol and diesel in a combustion engine.
In a diesel, air is pushed into the engine’s combustion chamber and heated by compression to over 425°C. Fuel is then pressure-injected into the chamber, where it mixes with the hot air and becomes hot enough to ignite.
A petrol engine is different because the fuel and air are mixed before they go into the chamber to be compressed. Compression is lower-ratio than in a diesel engine to ensure the fuel does not automatically ignite. Instead, a spark is used to ignite the blend of fuel and air.
Why choose petrol?
Disadvantages of a petrol engine
Why choose diesel?
Disadvantages of a diesel engine
There are advantages and disadvantage to either engine type. Your decision on whether to opt for a petrol or diesel comes down to which type of engine is most suitable for your driving