International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

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DOI Prefix: 10.47001/IRJIET

Influence of Octane Number on the Four-Stroke Petrol Engine Performance

Khoiri RoziMechanical Engineering, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50275, IndonesiaMuchammadMechanical Engineering, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50275, IndonesiaGifari Iswandito DermawanMechanical Engineering, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50275, Indonesia

Vol 9 No 5 (2025): Volume 9, Issue 5, May 2025 | Pages: 61-64

International Research Journal of Innovations in Engineering and Technology

OPEN ACCESS | Research Article | Published Date: 12-05-2025

doi Logo doi.org/10.47001/IRJIET/2025.905007

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Abstract

This study aims to determine the effect of octane number on the characteristics of a 4-stroke gasoline engine. This study tested 3 types of fuel with octane values RON 90, 92 and 98. The results of this study generally indicate that the higher the octane number of fuel oil will increase the engine performance value. The average engine torque value increased by 13.2% with RON 92 fuel and 38.15% using RON 98. The engine power value increased by 13.1% with RON 92 and 17.8% with RON = 98. The engine specific fuel consumption value decreased by 9.5% with RON 92 and decreased by 22% with RON 98.

Keywords

Power, torque, RON, specific fuel consumption


Citation of this Article

Khoiri Rozi, Muchammad, & Gifari Iswandito Dermawan. (2025). Influence of Octane Number on the Four-Stroke Petrol Engine Performance. International Research Journal of Innovations in Engineering and Technology - IRJIET, 9(5), 61-64. Article DOI https://doi.org/10.47001/IRJIET/2025.905007

Licence Copyright (c) 2026 International Research Journal of Innovations in Engineering and Technology creative common licence This work is licensed under Creative common Attribution Non Commercial 4.0 Internation Licence
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