Here's why:
* Compression Ratio: Diesel engines have a much higher compression ratio than petrol engines. This means that the air inside the cylinders is compressed to a much higher pressure before fuel is injected. This high compression results in a more powerful explosion, leading to higher torque.
* Fuel Injection: Diesel engines use direct injection, where fuel is injected directly into the combustion chamber. This allows for more precise fuel delivery and better combustion efficiency, further contributing to higher torque.
* Fuel Properties: Diesel fuel is denser and has a higher energy content than gasoline. This means that a diesel engine can produce more power from the same amount of fuel, leading to higher torque.
However, it's important to note that:
* Engine Size and Design: The specific torque output of any engine, whether petrol or diesel, is also dependent on factors such as engine size, design, and tuning.
* RPM Range: While diesel engines generally have higher peak torque, petrol engines often have a wider torque band and may produce more torque at higher RPMs.
In summary:
Diesel engines typically have higher torque than petrol engines due to their higher compression ratio, direct injection, and the properties of diesel fuel. However, engine size, design, and RPM range can also significantly impact torque output.
