Gasoline Cars were the dominant car of the 20th century. In the 21st century, they were replaced.
The earliest cars were steam cars. In 1769, Nicolas-Joseph Cugnot demonstrated his steam wagon. It was slow and did not replace the horse and carriage. The first practical gasoline-powered car came out in 1886. It was designed by Gottlieb Daimler of Germany. Later, Karl Benz, also of Germany, also developed his own car. These cars were still expensive. Steam cars were still available and so were primitive electric cars. In 1908, Henry Ford, founder of the Ford Motor Company, invented the first assembly line. This made his Model T cheaper. The automobile became popular as a result. After World War I, the engine was moved to the front, closed bodies and standardized controls were part of every car. During the Great Depression, the car's body was fully closed, and fenders, wings, running boards, and headlights were integrated into the body of the car. Following World War II, there was an increase in engine power and speed limits. In 1964, the Ford Mustang came into existence. In the 1970s, the Arab oil embargo caused a trend toward increasing fuel efficiency. Independent suspension started being used. Fuel injection replaced the carburetor. Safety became a major focus. The turbocharger saw widespread use. Fuel efficiency would increase.
Tech Level: 8-10
In modern times, fuel injection was now ubiquitous. Front-wheel drive and all-wheel drive became widespread. However, in the early 21st century, it became clear that gasoline cars were producing greenhouse gas emissions that contributed to global warming. Regulations were brought about prevent this from causing a catastrophe. What would replace gasoline cars? No one knew, but diesel cars provided a possibility.