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This classic Jaguar XJ has a 720-hp ungentlemanly secret

Forget Tawny Kitaen. If you want to make a Jaguar XJ rock, just do what this guy did: stuff a heavily modified and turbocharged General Motors V8 under the hood, and take it to the track.
The video calls this Series 1 XJ a sleeper, but with its open exhaust and obvious turbo whistle, the once-gentlemanly sedan is anything but. The owner says that the engine is GM LQ9 V8 that has been stroked to 402 cubic inches putting out around 720 horsepower with 12 pounds of boost (in standard form, this 6.0-liter V8 was used in the second-gen Cadillac Escalade). Check out the video below to see what that kind of power does for this classic Jaguar in the eighth-mile.

Jaguar unveils a Touring version of the XE SV Project 8 super sedan

Jaguar produced just 300 examples of the bonkers XE SV Project 8 super sedan. Now, it's going to build 15 more, but in a new street-spec Touring form. It's essentially the same as the track-spec version, but you lose the extreme aero elements. If you remember the Project 8 from a couple years ago, you know it has an adjustable carbon fiber wing sitting atop the decklid. This one just has a small lip spoiler, giving it a more discreet look. Additionally, the adjustable front splitter is swapped for a smaller fixed one that is less likely to scrape on everything you encounter on the road. Finally, Jaguar removed the aggressive decals, but you're allowed to put those back on optionally if you so choose. The Touring retains the 5.0-liter supercharged V8 making 592 horsepower and 516 pound-feet of torque. That's good for a 0-60 mph run in just 3.3 seconds. There is some bad news for those angling for the highest top speed, though. Jaguar limits the wingless Touring to just 186 mph, whereas the more stable, regular SV Project 8 is allowed to hit 200 mph. Another bit exclusive to the Touring is the required four-seat configuration. You were able to option the standard car with a half roll cage in place of the rear seats. But hey, don't you want to drive your friends around in your stupid-fast Jaguar? Weirdly enough, the Touring is actually a hair more expensive than the standard car. You'll be looking at a standard price of just over $190,000 to the regular car's $187,500 starting price. The difference is negligible at that point, and the Touring will actually be far more exclusive than the already limited standard Project 8. We certainly like the looks of the Touring version — it reminds us of the Porsche 911 GT3 Touring in nature and purpose, and there's a whole lot to love about that car. Jaguar says that even though it's only making 15 of them, some slots are still open for ordering. If the most powerful Jag without a wing strikes your fancy, we'd recommend getting in touch with Jaguar sooner rather than later.

Is the Jaguar XFR-S really worth $17k more than the XFR? [w/poll]

Adding performance to a car is rarely cheap - whether you're looking to do it yourself or rely on the factory to do it for you. In the case of the new Jaguar XFR-S, the cost differential over an already-impressive (and somewhat expensive) XFR is a stout $16,800. Auto Express recently got a hold of both cars to see whether that price pays off on the track.
For that price, Jaguar gives the XFR-S an extra 40 horsepower and 41 pound-feet of torque - for a total of 550 hp and 502 lb-ft - to go with a stiffer suspension, beefed-up differential and, of course, meaner styling. We don't want to ruin the results of the AE video, but right off the bat, the host says that you can feel the extra power of the XFR-S, but that it's not a "night-and-day difference."
Scroll down to see what happens when two high-powered Jags go head-to-head on a track. And then be sure to let us know whether or not you think the added money is worth it for the XFR-S in the completely informal poll below.