🔥Petrol engines use spark ignition, while diesel engines use compression ignition.
💪Diesel engines make more torque and are better at low-end power.
🚗Petrol engines rev higher and make more horsepower.
🔧Diesel engines have a higher compression ratio and are more fuel efficient.
⚡Petrol engines have a wider range of ignition timing control.
What is spark ignition and compression ignition?
—Spark ignition is the combustion process in petrol engines, where a spark plug ignites the air-fuel mixture. Compression ignition is the combustion process in diesel engines, where the heat of compressed air ignites the injected fuel.
Do petrol engines make more horsepower than diesel engines?
—Yes, petrol engines rev higher and can make more horsepower compared to diesel engines.
Do diesel engines make more torque than petrol engines?
—Yes, diesel engines are known for their torque output, which is better at low-end power.
Are diesel engines more fuel efficient than petrol engines?
—Yes, diesel engines have a higher compression ratio and are more fuel efficient compared to petrol engines.
Why do petrol engines have a wider range of ignition timing control?
—Petrol engines use spark plugs and ignition coils to control ignition timing, allowing them to ignite the air-fuel mixture at different points in the compression stroke.
00:00Petrol and diesel engines have similar structures but different combustion processes.
09:06Petrol engines have higher red lines and rev higher than diesel engines.
13:10Diesel engines have higher compression ratios, resulting in more torque.
15:03Diesel engines have a higher thermal efficiency compared to petrol engines.
16:31Petrol engines typically have a thermal efficiency between 20% and 35%, while diesel engines can reach 40% to 45%.
