What is the general cylinder pressure for cars?

[IsabellaMarie]

Different car models have varying normal cylinder pressures. Generally, Japanese cars have around 1100KPa, while European and American cars are approximately 1200-1300KPa. Modern direct-injection engines tend to have higher pressures. A normal four-cylinder engine should have a cylinder pressure above 7 atmospheres. Below is some relevant information: Introduction to cylinder pressure: It refers to the compression force size when the piston reaches the top dead center at the end of the compression stroke. Hazards of insufficient cylinder pressure: It can lead to decreased fuel efficiency, insufficient power, increased fuel consumption, and excessive engine temperature; increased carbon deposits, severe engine shaking; lubricating oil entering the combustion chamber, causing oil burning; black smoke from the exhaust pipe, reduced engine lifespan, and premature vehicle failure.