Last year, Nissan has launched the Nissan Green Program 2016, a five-year initiative to position the company as the world's most environmentally friendly vehicle manufacture. Nissan Leaf is the world's first mass produced emissions free vehicle.
Other eco-friendly cars are Audi A3-TDI & Mercedez Benz BlueTec Hybrid among the diesel cars, Honda CR-Z, Chevrolet Volt & Lexus CT 200h among the hybrid ones, etc.
The most dependable fuel efficient car of 2014 is the Ford Focus.
the maserati granturismo is the worlds most respected car - understated, yet original and exclusive. not showy, but beautiful.
The Most Efficient Car is The Electric Car sports Car that recently came out. The last answer was terrible so i changed it but this one is probably worse.
I would think that the most luxurious car is the Lincoln Navigator.
Porsche
BMW
Its the bugatti royale
Toyota Corolla
The 2014 Chevrolet Volt is the most fuel-efficient small and mid-size passenger car.
The most fuel efficient used car is the 2004 to 2006 Toyota Scion. It gets 30 miles per gallon combined.
Road legal, stiock car, i believe a Bugatti Veyron
the best car in the world is maruti suzuki 800R