Internal Combustion Engines
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of

12-20 kg/cm² and 350-450°C
20-30 kg/cm² and 450-500°C
6-12 kg/cm² and 250-350°C
4-6 kg/cm² and 200-250°C

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Internal Combustion Engines
In a typical medium speed 4-stroke cycle diesel engine the inlet valve

Opens at 20° before top dead center and closes at 35° after the bottom dead center
Opens at 10° after top dead center and closes 20° before the bottom dead center
Opens at top dead center and closes at bottom dead center
May open or close anywhere

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