Saab 9-4X Optimized for Bio Fuels
"... Saab 9-4X BioPower Concept demonstrates the potential ... a 2.0-liter, four-cylinder turbo engine optimized for bioethanol (E85) fuel to give 300 hp and 400 Nm (295 ft.lbs.) of torque - ..." 
"... Its current BioPower models are the top-selling flex-fuel vehicles in Europe, ... offering both more power and producing less CO2 emissions when operating on E85 fuel compared to when fueled by only gasoline. ..."
"... engine is optimized for E85 fuel (85% bioethanol, 15% gasoline) ..."
"Engine efficiency is also improved by the use of direct injection (DI) and continuously variable valve timing (VVT) on both the inlet and exhaust sides. ..."
Via: SaabUSA.com Link