1) An experimental investigation was conducted to analyze the performance of a variable compression ratio diesel engine at different compression ratios and loads.
2) The results showed that brake power was highest at a compression ratio of 17 and load of 7 kg. Specific fuel consumption was lowest at a compression ratio of 18 and load of 6 kg.
3) The optimum compression ratio was determined to be around 17.5 based on brake power, brake thermal efficiency, and specific fuel consumption. At this ratio, the engine showed better performance with higher efficiency and lower fuel consumption.