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 maserati granturismo is the worlds most respected car - understated, yet original and exclusive. not showy, but beautiful.
The most dependable fuel efficient car of 2014 is the Ford Focus.
I would think that the most luxurious car is the Lincoln Navigator.
Porsche
BMW
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.
Its the bugatti royale
Toyota Corolla
Road legal, stiock car, i believe a Bugatti Veyron
the best car in the world is maruti suzuki 800R
The 2014 Chevrolet Volt is the most fuel-efficient small and mid-size passenger car.
the worlds most sold car was the German 1938 vw beetle selling way over 21,000,000 of them, it was produced up to 2003 in the factory in Brazil.