Comparing Fuel Self Ignition Temperatures

The self-ignition temperature is the minimum temperature at which a fuel will ignite spontaneously without any spark or flame.

When comparing diesel and petrol:

• Diesel fuel has specific chemical properties that cause it to ignite more readily under compression heat compared to petrol.
• Petrol, being more volatile, typically requires a higher temperature or a direct spark to ignite.

Based on this comparison, the self-ignition temperature of diesel is considered lower than that of petrol.