6. Turbocharging
During the 1970s and 1980s, Saab and BMW helped bring turbocharging into the automotive mainstream. By forcing extra air into the engine, turbochargers enabled smaller engines to deliver greater power and improved fuel efficiency. This innovation allowed automakers to meet stricter emissions standards without sacrificing performance. Today, turbocharged engines are found across a wide range of vehicles, from sports cars to everyday commuters, revolutionizing how efficiency and power coexist. Background