A petrol (gasoline) engine can be an otto cycle engine or it may not be. Click the link.

Nicolaus Otto built the first practical four-stroke internal combustion engine called the "Otto Cycle Engine," and when he completed his engine, he built it into a motorcycle.

The four stroke internal combustion engine. One of the most important landmarks in engine design comes from Nicolaus Otto who in 1876 invented an effective gas motor engine. Nicolaus Otto built the first practical four-stroke internal combustion engine called the "Otto Cycle Engine," and when he completed his engine,

Otto cycle using SI engine is write r wrong Otto cycle using SI engine is write r wrong

The otto cycle is the technical name for the 4 stroke engine.

so a Gasoline or Petrol engine.