At 2008 Geneva Motor Show, Infiniti will unveil completely redesigned FX.
The FX will compete with Volkswagen Touareg, Porsche Cayenne and Lexus RX.
The 2009 FX will be available in two different choices: the FX37 and the FX50. As you suspect already one will be powered by a 3.7 liter and the other by a 5.0 liter engine.
The FX37 wil be powered by the same 3.7 liter VQ-series V6 engine engine used in the G37 Coupe and will deliver 300 hp. The FX50 will be powered by a 5.0 liter engine with an output of 390 hp and 369 lbs-ft.