Why Do Diesel Engines Have More Torque?


Quick Answer

According to Gale Banks Engineering, diesel engines have more torque than certain other engines due to cylinder pressure, turbocharger boost and stroke length. The fact that diesels possess these characteristics allows them to perform at a higher level than other gasoline engines.

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Full Answer

Typically, diesels create a longer stroke, specifically because the pistons of the engine move at fast speeds, thus creating longer strokes; this feature results in higher torque. Furthermore, due to higher cylinder pressure and increased pressure on the crankshaft, the diesel engine is further effective in creating more torque. In addition, diesel fuel has around 10 to 11 percent more energy per gallon than gasoline.

Diesel engines are also known for burning fuel more efficiently than a gasoline engine, which allows the engine to deliver more power more effectively. Additionally, a diesel engine compresses just air, to a very high temperature and pressure, so that the diesel fuel ignites without a spark when injected. In contrast, gasoline engines compress a fuel-air mixture, which then has to be ignited by a spark, decreasing its ability to create torque. Gale Banks Engineering Incorporated supports the idea that despite cost, diesel fuel is becoming more popular because of its efficiency.

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