The Extreme Bentley, as the company has called it so far (even creating the website www.extremebentley.com for it, with a great video), will not run only on ethanol, as some reports may lead you to think. It will be a flexible fuel vehicle, or else, it will run on any proportion of gasoline and E85. E85 uses 85% of ethanol and 15% of petrol in order for the car to start in a smooth way. In cold days, ethanol-powered cars tend not to start easily. In Brazil, where flexible fuel cars use 100% ethanol, there is a small fuel tank containing petrol to help cold morning starts.
Based on Bentley Continental GT, the car is only said to be the fastest Bentley ever, but there is no technical specs so far to support this claim. Another information to confirm only in March, at the Geneva Motor Show.