Audi's 'gas-to-liquid' limo shows urban law-makers the way forward
17 May 2007

The world's metropolitan law-makers gathered in New York this week (14-17 May), at the C40 Climate Summit, with the aim of reducing global greenhouse gas emissions. One of the routes to do that is right under their noses, however – a diesel Audi A8, shown at the summit itself, that runs on squeaky clean fuel.The A8 TDI runs on Shell's Synfuel, a gas-to-liquid propellant manufactured from natural gas that's entirely free from sulphur and aromatics. When burned, Synfuel produces 35 per cent less soot, 93 per cent less carbon monoxide, nine per cent less nitrogen oxides and five per cent less carbon dioxide than conventional diesel fuel. Unlike diesel, it produces no sulphur dioxide at all. And, according to Shell, it can be used in any diesel-engined Audi model without any retrofitting measures.According to various fuel industry sources, Synfuel has various advantages compared to other alternative fuels. The raw material is available in sufficient quantities to meet global demand, it can easily be produced in petrol, diesel or kerosene form without additional steps like cracking or reforming, and it's compatible with existing engine and fuel distribution technology. It's also been proven reliable under extreme conditions, says Audi. The company's 2006 Le Mans winning R10 TDi racer ran on a Synfuel blend.So why isn't it available on the UK forecourts? Well, according to Shell spokeman Adam Newton, it already is, as a constituent part of the company's V-Power diesel fuel. "Gas-to-liquid diesel is already cleaning up cars in the UK, and we've committed to increasing our gas-to-liquid production ten fold by 2010," he told Autocar.

Our Verdict

Audi A8

The Audi A8 is a highly capable and desirable luxury saloon that's very easy to live with, despite its flaws

Add your comment

Log in or register to post comments

Find an Autocar car review

Driven this week

  • Jaguar XF Sportbrake TDV6
    First Drive
    19 October 2017
    The handsome Jaguar XF Sportbrake exhibits all the hallmarks that makes the saloon great, and with the silky smooth diesel V6 makes it a compelling choice
  • Volkswagen T-Roc TDI
    First Drive
    19 October 2017
    Volkswagen's new compact crossover has the looks, the engineering and the build quality to be a resounding success, but not with this diesel engine
  • BMW M550i
    First Drive
    19 October 2017
    The all-paw M550i is a fast, effortless mile-muncher, but there's a reason why it won't be sold in the UK
  • Volvo V90
    First Drive
    19 October 2017
    The Volvo V90 is a big estate ploughing its own furrow. We’re about to see if it is refreshing or misguided
  • Kia Stonic
    First Drive
    18 October 2017
    Handsome entrant into the bulging small crossover market has a strong engine and agile handling, but isn’t as comfortable or complete as rivals