Spectacular premiere for new common-rail diesel engine Opel Eco-Speedster: Saving Fuel is Fun 1.3 liter displacement 250 km/h top speed 2.5 liter fuel consumption Rüsselsheim. The world premiere of the spectacular Eco-Speedster concept at this year's Paris Motor Show (September 28 to October 13) marks the start of the biggest diesel-offensive in Opel's history. Through the end of 2003 Opel will introduce across the range four all-new diesel…