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Fuel economy in automobiles

Data from the Metropolitan Transport Commission for the nine-county San Francisco Bay Area, states an automobile occupancy rate of about 1.3 passengers per car.

In 2006, the average occupancy for cars in the UK was 1.58.
The Oak Ridge National Laboratory (ORNL) state that the energy content of 1 U.S gallon of unleaded gasoline is 115,000 BTU or 32 MJ/L and that of 1 U.S. gallon of diesel is 130,500 BTU or 36.4 MJ/L.

The Volkswagen Polo 1.4 TDI Bluemotion and the Seat Ibiza 1.4 TDI Ecomotion, both rated at 3.8 L/100 km (62 mpg–U.S. / 74 mpg–imp) (combined) are the most fuel efficient cars on sale in the UK as of 2008-03-22. Accounting for Diesel fuel gives us 4.3 L/100 km (54 MPGeUS).

Honda Insight was rated 70 mpg–U.S. (3.36 L/100 km / 84.1 mpg–imp) highway.

Honda Civic Hybrid- The second most energy efficient automobile in the U.S., it regularly averages around 45 miles per gallon.

Toyota Prius - According to the U.S. EPA's revised estimates, the combined fuel consumption for the 2008 Prius is 46 mpg–U.S. (5.11 L/100 km / 55.2 mpg–imp),making it the most fuel efficient U.S. car of 2008.In the UK, the official fuel consumption figure (combined) for the Prius is 4.3 L/100 km (55 mpg–U.S. / 66 mpg–imp).

The General Motors EV1 was rated in a test with a charging efficiency of 373 Wh-AC/mile or 0.6 kWh/100 km .The four passenger GEM NER also uses 169 Wh/mile or 0.3 kWh/100 km , which equates to 0.1 kWh/100 km for four passengers, albeit at only 24 mph (39 km/h).

Since hydrogen is no more a source of energy than electricity is, the 50-70% efficiency of producing hydrogen has to be combined with the vehicle efficiency, so for example a

hydrogen vehicle which gets 8.7 L/100 km (27 MPGeUS) is actually getting only about 14.7 L/100 km (16 MPGeUS).

Thursday, July 31, 2008

Sticker Mula Diedarkan..

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