Should the 1.4T Sagitar use 92 or 95 octane gasoline?

[DelAmy]

1.4T Sagitar should use 95 octane gasoline to prevent knocking. Using 92 octane gasoline may cause knocking. The higher the octane rating, the higher the octane value of the gasoline. Knocking is an abnormal combustion phenomenon in the engine. When the piston is in the compression stroke, it moves upward to compress the combustible mixture, increasing both the pressure and temperature of the mixture. If the combustible mixture ignites before the spark plug fires, knocking occurs. The Sagitar is a compact family car under Volkswagen, with dimensions of 4753mm in length, 1800mm in width, 1462mm in height, and a wheelbase of 2731mm. The 2019 Sagitar is equipped with two engines: a 1.2T and a 1.4T, with engine models EA211DJN and EA211DJs respectively.