Due to its properties being relatively similar to gasoline, great attention has been paid to butanol as a more promising fuel candidate in SI engines [10–12]. Butanol has several advantages over ethanol, including being less hydrophilic and corrosive, having higher energy content and flame velocity, and having relatively low latent heat of vaporization [13]. Szwaja and Naber [14] investigated the combustion characteristics of n-butanol in a single cylinder CFR engine under different spark timings, compression ratios and n-butanol volumes.