AC Schnitzer 99d is a $205,500 BMW Z4 Fitted with a Diesel Engine that Returns 3.8lt/100km or 61.9 mpg

BMW's decision to create the new 'i' sub-brand for the growing number of eco-conscious buyers has apparently rubbed off its partners like AC Schnitzer, as the German tuning firm will be launching a production ready concept based on the Z4 hardtop-roadster at next week's Geneva motor show. Developed as an eco-friendly sports car that adapts to AC Schnitzer's new motto "Efficient Performance",