2003 Jaguar Xj8 Base Sedan 4-door 4.0l on 2040-cars

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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 confirms 575-hp F-Type Project 7 for Goodwood debut

Two days ago, Jaguar announced it had something special in store for the Goodwood Festival of Speed this weekend. Then yesterday images of that special creation, the F-Type Project 7, leaked out. And now, as promised, Coventry has released the full details on the ultimate F-Type to date. And its even better than we expected.
The production version of the concept revealed last year, the F-Type Project 7 celebrates the 60th anniversary of the D-Type by borrowing some of that legendary roadster's design cues, right down to the rear fin and British Racing Green livery with white racing stripes.
Of course the Project 7 is more than just a retro appearance package. The bespoke speedster packs a version of Jaguar's prolific 5.0-liter supercharged V8 with 575 horsepower - 25 more than the F-Type R Coupe - to make it the Leaping Cat marque's most powerful production car to date. Mated to Coventry's familiar eight-speed automatic transmission, that's said to be enough to propel the Project 7 to 60 in 3.8 seconds en route to an electronically limited top speed of 186 miles per hour. Keeping all that power and pace in check and on the road are such features as carbon ceramic brakes, a full complement of carbon-fiber aero components, electronic differential and brake-based torque vectoring system.

Jaguar could yet offer more hardcore F-Type R-S

Jaguar pulled a fast one on us all when it unexpectedly shoehorned all 550 horsepower of the 5.0-liter supercharged V8 from the XKR-S into the new F-Type Coupe to supersede the existing V8 S model with the F-Type R. But that's just the beginning, according to the latest intel coming from the UK.
According to Autocar, in speaking to Jaguar design director Ian Callum during the coupe's unveiling at the LA Auto Show, the British automaker could yet offer R-S and R-S GT versions of the F-Type. Just what mechanical changes those would bring when the F-Type R already packs the company's top engine remains to be seen, but given that the same engine also powers the flagship XJR performance saloon, we could envision Jaguar developing an even more powerful version for R-S versions of the little coupe and big sedan.
The GT version, meanwhile, would likely offer more extreme aero and a lighter form for the truly performance-obsessed. Considering that the new top-of-the-line F-Type is already pushing the hundred-grand mark, you can bet any R-S and R-S GT version would approach double the base F-Type's $65k sticker price.