Nissan North America Inc.’s Infiniti luxury unit says the ’08 G coupe and a new cross/utility vehicle concept will be debuting at the upcoming New York auto show in April.

The introduction of the G coupe follows the debut of the new ’07 G35 sedan last November. The coupe is expected to go on sale this summer in the U.S.

Infiniti is not releasing specs for the car yet, but there has been speculation it will receive a larger version of Nissan’s storied 3.5L V-6 VQ engine, with a displacement of 3.7L. The auto maker trademarked the name G37 last year.

Meanwhile, the CUV concept is a hint at what a new production CUV for Infiniti will look like when it arrives in late 2007.