
2009 audi a4 20 tdi e 001
Europhiles in the U.S. have been clamoring for
diesel four-cylinders for years, and just as ardently, the average American consumer has indicated their desire to have nothing to do with oil-burning four-pots. While we're still out of luck,
Audi is prepping a car for Europe that will make us even more jealous: the A4 2.0 TDI e.
Billed by Audi as the most efficient standard-sized sedan on the market, the A4 2.0 TDI e rates a healthy 51.13mpg US (4.6L/100km) in the EU's combined cycle. That works out to 119g/km of CO2 emissions - just 10g/km more than a second-gen
Toyota Prius - and puts it head and shoulders above its petrol-powered competition at
Mercedes-Benz, BMW, Lexus - or even other
Audis.
BMW and Mercedes both offer competitive diesels in Europe, but Audi thinks its A4 package will prove the most efficient. Even if it doesn't, Audi has shown over the last year that it has something special for the market, taking the sales title in its
home market of Germany. The company even has plans to take over
all of Europe by next year.
Power ratings of the 2.0L TDI engine sit at 136hp (100kW) - enough to shove the sedan to 62mph in 9.5 seconds and on to a top speed of 133.6mph (215km/h). A range of special efficiency-enhancing technologies have been employed on the TDI e model, including a start-stop function and neutral idle function, which together account for 2mpg (0.2L/100km) in fuel savings, or about 5g/km CO2.
Pricing starts at €30,800, and the first cars will be delivered in Europe in June. Audi hasn't yet announced any plans to bring the car to the U.S.
2009 Audi A4 2.0 TDI e
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http://tonto.eia.doe.gov/oog/info/gdu/gasdiesel.asp
The reason diesel is more expensive part of the year is the Northeast. Millions of people there still use diesel fuel to heat their homes in the winter. As such, historically diesel fuel is more than premium gasoline in the winter and less than regular is the summer. Simply supply and demand.
Diesel didn't use to be nearly as refined as gasoline. That changed with the ULSD requirement to reduce sulfur content in diesel fuel to 15 PPM. Diesel is a heavier grade of fuel than gasoline and sulfur tends to stay in the heavier grades. So to meet ULSD requirements, refineries had to install new equipment to remove sulfur from diesel fuel. That makes the refining process for diesel more complicated and more expensive.
BTW I own a 2003 VW TDI and a 2005 Prius. Since I have owned the TDI, diesel fuel has averaged $0.05 per gallon more than regular gasoline.
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