The all-new Maserati Ghibli debuted in Shanghai this week as the first ever mid-sized four-door luxury sedan in the company’s history. But that’s not the only first for the Ghibli. For the first time ever, Maserati will offer a diesel option, in this case a 3.0-liter V-6 turbo-diesel. The rear-wheel-drive Ghibli aims to move Maserati closer toward its goal of selling 50,000 vehicles in a year by 2015. While pricing has not been officially announced, it is expected to start at around $91,000, competing with the Audi A6, BMW 5 Series and Mercedes-Benz E-Class for a share of the luxury sedan market. A 410-horsepower 3-liter gasoline V-6 and all-wheel drive will also be available when the Maserati Ghibli reaches the North American market as a 2014 model in late summer or early fall. Both engines are paired with an eight-speed automatic transmission.