Gas vs. Diesel

Topics: Internal combustion engine, Petroleum, Diesel engine Pages: 1 (406 words) Published: April 24, 2013
Gas engines versus diesel engines have been a long time opponent. Each has its own pros and cons but its really what your needs demand. Power and torque is a big player in this. If you want higher horsepower and fast acceleration, a gas engine is for you. If you need to tow objects and need a lot of low-end power a diesel engine would suit you. Fuel economy can play a bigger part in your decision. Diesel engines usually have a better fuel economy rating because of the way they don’t waste fuel during combustion unlike the gas-powered counterparts. The combustion of a Diesel engine is just like the combustion of a gasoline engine but in a diesel it’s a little bit different. Diesel engines do not have spark plugs to ignite the fuel; it uses high compression rate to ignite the fuel. The piston compresses the intake air that heats up and at the precise moment fuel is injected directly into the cylinder and combusts. In gasoline engines fuel is mixed with air, compressed by pistons and ignited by sparks from spark plugs. Diesel fuel and gasoline fuel come from the earth. Diesel fuel is a heavier more oily fuel than gasoline because in the refining process, diesel is refined less. Diesel takes longer to evaporate than gasoline because it has more carbon atoms than gasoline. The boiling point of diesel is actually higher than that of water. Diesel fuel has a higher energy density than gasoline; diesel has 147,000 BTU’s while gasoline has 125,000 BTU’s per gallon. This leads to diesel being more efficient and gets better mileage than gasoline. In the views of the environment, gasoline is more volatile than diesel. The reasons are that its not what its base consists of, it’s the additives in it. Diesel produces fifteen percent more green house gases than gasoline but diesel gets twenty-forty percent better fuel economy. It may seem that diesel is worse for the environment but when you go to fill up your tank with diesel compared to gasoline the percentage of emissions...
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