Friday, May 04, 2007 at 12:02
wiki doesnt take into account drive-quality, price vs vehicle and when it was made/when bought...nor gas
AND by buying a lower cost petrol-vehicle than what you could have actually afforded in diesel actually takes you out of the argument anyway..lol...you are already ahead..
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Diesel engines are more efficient than gasoline (petrol) engines of the same power, resulting in lower
fuel consumption. A common margin is 40% more
miles per gallon for an efficient turbodiesel. For example, the current model Škoda Octavia, using Volkswagen Group engines, has a combined Euro rating of 38
miles per US gallon (6.2 L/100 km) for the 102 bhp (76 kW) petrol engine and 54 mpg (4.4 L/100 km) for the 105 bhp (75 kilowatts) diesel engine. However, such a comparison doesn't take into account that diesel
fuel is denser and contains about 15% more energy. Adjusting the numbers for the Octavia, one finds the overall energy efficiency is still about 20% greater for the diesel version, despite the weight penalty of the diesel engine. When comparing engines of relatively low power for the vehicle's weight (such as the 75 hp engines for the VW Golf), the diesel's overall energy efficiency advantage is reduced further but still between 10 and 15 percent.
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