Aerodynamics and pollution are dual sciences that are at the core of the maintenance of environmental sustainability and maximum energy efficiency. Aerodynamics is the core science involved in conserving energy within transport systems such as cars, airplanes, and trains. Aerodynamic devices with maximum efficiency reduce drag, thereby increasing fuel usage and emissions to a minimum. Aerodynamic components such as diffusers, tail-plates, and spoilers achieve maximum performance by reducing drag and lift forces to a significant extent. Computational simulations based on the Computational Fluid Dynamics (CFD) are conducted in this research work for analyzing the aerodynamic performance of a conceptual automobile. For this, the Reynolds-Averaged Navier–Stokes (RANS) equations and k-ε turbulence model are employed to compute the flow field. Aerodynamics geometries are also employed to analyze how their impact is generated based on the sophisticated unstructured mesh. These are pressure distributions and streamlines of the flow that illustrate the aerodynamic effect of devices like the diffuser, tail-plate, and spoiler. The optimum of all those tested was the tail-plate and diffuser, with a lift coefficient reduction of 138.4% and a drag coefficient reduction of 12.56%. These are developed not only to enhance the vehicle's stability but also to enable smaller environmental prints with reduced power consumption.