Now that Jaguar and Aston Martin are no longer officially related, the leaping cat feels free to pounce on its former corporate sibling. The current Jaguar XK-R isn't enough to really challenge cars like the Aston Martin Vantage V8 or Porsche 911, so Jag is cooking up a hotter version -- an XK-R-R?

With ECU and engine modifications, the forced breather should be good for more than 500 HP and a 180+ MPH top speed. With that kind of heat -- an 80+ HP jump over the current XKR and 120+ more than the Vantage -- the car will get to 60 in 4.5 seconds. It is expected to take cues and more from Jag's GT3 race car, yet while it is thought to get racing-style bucket seats and carbon fiber trim, it will still be appointed like a Jag. Outside, a new front air dam is the only change that has been spied so far.

[Source: Autogespot via Motor Authority]