I'm talking about Paris, here, people. Officially named the Toyota D-4D 180 Clean Power Concept, the large sedan is an attempt to show that performance and environmental-friendliness can peacefully coexist. The engine is one of the most modern diesel lumps ever developed— and although Toyota isn't being too specific, the displacement will be in the 1.9 to 2.2 liter category, with class-leading power and the world's lowest combined NOX and particulate diesel emissions ratings. Nice. The car will also make use of something perhaps just as compelling as the advanced engine: a strong visual design that doesn't try too hard to advertise its alternative fuel angle. Well, besides that giant banner plastered down the side, I guess.