|Audi’s GTL-fueled A8s.|
Audi, which is providing the chauffeur service at the World Economic Forum (WEF) Annual Meeting 2007, 23rd to 28th January in Davos, Switzerland, is running ten of its Audi A8 fleet there solely on Shell’s Gas-to-Liquids “SynFuel” diesel.
All 80 of the long-wheelbase luxury A8s in Audi’s Davos fleet are fitted with 4.2-liter diesel engines, which generate 240 kW (322 hp) of power with fuel consumption of 9.4 liters/100km (25 mpg US). The total fleet provided by Audi for the WEF consists of 172 vehicles.
The Fischer-Tropsch-derived GTL SynFuel is free of sulphur and aromatics. Compared to conventional diesel, soot is reduced by 35%; carbon monoxide emissions by no less than 93%; NOxby up to 9%; and carbon dioxide (CO2) emissions go down by around five%. The fuel can be used for all diesel-engined Audi models without any retrofitting measures.
Audi has already tested SynFuel under racing conditions. At the Le Mans 24 Hours of 2006, the race-winning Audi R10 with TDI engine was filled with a SynFuel blend.
|Net heat of combustion [MJ/kg]||42.5||43.99|
|Aromatics content [%-w]||20.6||0|
|Carbon content [%-w]||86.3||84.9|
|Sulfur content [ppm]||<10||0|
|Initial boiling point [°C]||220||197|
|Final boiling point [°C]||360||358|
The Basis for Sustainable Mobility (Volkswagen AG)