Engine downsizing of automobiles

Engine downsizing refers to using a smaller engine that provides the power of a larger engine through technologies like turbocharging and direct fuel injection. It allows for increased fuel efficiency and reduced emissions. Downsizing is becoming more common as manufacturers aim to meet stricter emissions regulations. Technologies like turbocharging, direct injection, variable valve timing and common rail diesel systems allow smaller engines to produce comparable power output to larger engines while using less fuel. However, direct injection engines can experience carbon buildup that reduces power over time if not addressed. Downsizing is expected to continue growing with turbocharging enabling smaller gasoline and diesel engines to replace larger naturally aspirated engines.