The results in the corresponding article (https://doi.org/10.3390/en14206696) are generally reported in the form of contours of brake specific fuel consumption (BSFC), as a function of certain geometrical parameters of interest. This dataset contains folders corresponding to each figure in the corresponding article. Each folder contains the MATLAB code (.m files) and any data (.mat files) required to generate the figure. The interested party can run the MATLAB .m file to generate the corresponding figure.