It's mere speculation at this point, but we're told to keep our eyes peeled at the 2009 Detroit auto show for a real fast cat: the 2009 Jaguar XF-R.

While Jaguar's mum on the subject, British magazine Autocar says sources at the company "insist" the XF-R will debut at the Detroit show in January 2009, with sales beginning shortly afterward in March.

Though Jaguar took a prototype to this year's Goodwood Festival of Speed, it kept most details - other than displaying its performance prowess on the hill climb - under wraps.  Current buzz has the car using a supercharged 5.0-liter V-8 with at least 500 hp on tap.

Source: Autocar