No, this isn't a story diving into the different models in the Volkswagen family. Instead, it's our friend Jason Fenske of Engineering Explained examining the differences between gasoline and diesel engines.
It goes a bit deeper than spark plugs and glow plugs. The primary difference between the two types of engines is related to the air-fuel mixture and how it's compressed. Gasoline likes to combust with the helping hand of your friendly spark plug while diesel prefers to mash the fuel and air and compress it on its own.
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Of course, there's a whole lot more going on inside each type of engine. They follow the same basic four-stroke combustion process, it's just that the different fuels make power parties in different ways. If you already know about the difference in air-fuel ratios, you might be surprised to learn a bit more about the differences. Did you know that the diesel engine typically doesn't use a throttle body? When you press down on the gas you're letting in more fuel and not more air.
See, you can learn something new every day. And that's the beauty of this video series. So sit back, hit play, and learn something new about your favorite mode of transportation...until the Hyperloop actually becomes a reality. (And we'll turn to Engineering Explained for an explanation of that one too).