This article presents the results of fuel consumption, efficiency and emissions of the 1NZ-FE engine when using a gasoline-ammonia fuel blend using AVL Boost software. The simulation model was built based on the actual technical specifications of the 1NZ-FE engine with Fractal combustion model, heat transfer model, Woschni 1978 model, NOx, HC, CO emissions models, and several other theoretical models. Gasoline-ammonia fuel was simulated to be injected into the engine intake manifold similar to gasoline. The simulation results show that increasing the amount of ammonia per cycle to maintain λ = 1 increases the fuel consumption of the engine, while reducing NOx, CO, and HC emissions, with greater reductions as the ammonia content increases. Additionally, to ensure engine power when using ammonia fuel, additional fuel must be added compared to when using gasoline across the entire speed range from 1000 to 6000 revolutions per minute.