1984 Jaguar Xjs Set Up For Chevy V-8 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.

Motor Trend pits Aston V12 Vantage S against Jaguar XKR-S GT in battle of the Brits

With the recent increase in higher-performance versions of already high-performance vehicles, like Mercedes-Benz and its AMG Black Series, the public is now gaining even greater access to speed and maneuverability. Two of the most recent sports cars to get their wicks turned up include the Jaguar XKR-S GT and the Aston Martin V12 Vantage S.
Both of these cars are the pinnacles of their lines, with the Jag lording over the XKR-S, XKR and XK while the Aston rules over the standard V8 Vantage S and V8 Vantage. Motor Trend has opted to pit the two rivals together for some thorough testing, and it just happened to bring along a few video cameras to capture all the action.
There's nearly 19 minutes of super hot sports car action below, so scroll down and enjoy.

Junkyard Gem: 1973 Jaguar XJ6

It requires a certain high level of commitment to keep an old Jaguar on the road, and so plenty of first-generation Jaguar XJs end up as projects that never get finished, sitting in yards or garages for decades before winding up in the nearest U-Wrench yard. As I clomp through car graveyards around the country in search of interesting machinery, I see so many 1980s XJs that I don't bother to photograph many of them … but a genuine Series I early Jag is a different story. Here's a '73 XJ6 whose final parking space (prior to facing the cold steel jaws of The Crusher) sits right next to that of a same-year Mercedes-Benz 450SLC in an East Bay yard. How the mighty have fallen! The C107 was too picked-over to be worth photographing, but you can admire the photos of this much nicer '72 I found in Denver a few years back. Unlike the last Series 1 XJ6 that I've photographed (in the very same yard, albeit 13 years ago), this car has not had its original straight-six engine replaced by a small-block Chevrolet V8 (because Jaguar parts were expensive and Chevy parts were cheap during the 1970s, that swap happened frequently). The US-market XJ6 got 150 horsepower from this smooth-running DOHC six, 40 fewer horses than the (far more expensive) 450SLC that year. The interior looks ravaged by the decades, but you can still discern the opulence that once reigned in this wood-and-leather-lined space. The dash boasts a full complement of authentic Smiths gauges, with a tasteful Kienzle clock right in the middle. Here's why we can assume that fewer than two of those instruments functioned at any given time during the life of this car: wiring by The Prince of Darkness! Working on electrical faults in these cars built up your patience while undermining your faith in symptom-to-problem relationships. The six-digit odometer ensures that we'll never know if we're looking at a 56,819-mile car or a 356,819-mile car. I'd guess 156,819 if I had to, based on pedal wear. These cars were very popular in the Bay Area, which has been full of European-car aficionados since the first Renault AXs sputtered off the docks of the San Francisco waterfront. Back in the 1970s and 1980s, you'd never see an old XJ without one of these pre-EU "GB" stickers on the back. The faded condition of this one suggests decades of sitting in the sun, probably while the car sat dead in the driveway due to electrical problems.