Nissan is planning a Z sports coupe slotted above the current Nissan 350Z called the Nissan 450Z. The upgraded model will feature a 4.5 litre V8 engine which would likely be a tuned up version of the VK45DE from the Infiniti M45. The VK45DE makes 340hp currently, but Left Lane News reports the final product will feature 430hp. Of course, all that crazy power requires all-wheel drive, so that will be standard as well.
Nissan plans to pitch this new Nissan 450Z against the Porsche Carrera 911 and the Maserati 4.2.
Source: Left Lane News