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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.

40+ cars that barely avoid the gas guzzler tax

The Gas Guzzler schedule, with mpg ratings and charges that haven't changed since 1991, lays out which fuel-swillers owe what to Uncle Sam.
I started thinking about the "Gas Guzzler Tax" - considerably less well known as The Energy Tax Act of 1978 - when I was driving Dodge's new Challenger SRT Hellcat last week. Unsurprisingly for a car that can burn 1.5 gallons of gas per minute at max tilt, theoretically able to empty a full tank of premium in about 13 minutes, the Hellcat will be subject to the Gas Guzzler Tax schedule when it goes on sale.

Jaguar Land Rover releases a vintage-looking infotainment system for classics

Jaguar and Land Rover have a new option for owners of its older vehicles: a touchscreen infotainment system. Much like the Porsche classic infotainment head unit released a few years ago, this one tries to blend in with its interior surroundings. Five distinct designs of these "Classic Infotainment Systems" are offered in an effort to have an option that fits well with the interior of any particular car offered by Jag or Land Rover over the past few decades. Chrome and black options are available for Jaguars, while brushed aluminum and black are the choices for Land Rovers. The infotainment system has navigation with 2D or 3D maps and Bluetooth audio. Sure, you don't need to stream Spotify in a 1970s Land Rover, but now you can. Jaguar says it'll offer much higher quality sound with a 4 x 45 watt output from the single DIN head unit, but you might need to upgrade those ancient speakers to actually take advantage of it. There's no mention of satellite radio like Porsche's unit offers, unfortunately. It is a radio though, so we get both AM and FM functionality. Jaguar says it's "compatible with negative earth vehicles" (newer vehicles use negative grounding systems) and retails for $1,796 before taxes in the U.S. You can buy and have it professionally fitted at an "authorized" Jaguar or Land Rover dealer if you'd like as well. It's easy to shake your fist at such a device for classic cars, but this head unit tried hard to be an elegant piece — we're still not sure about slotting it into an old E-Type though... Here are U.S. specific model fitments: Jaguar XJ40; XJS; XJ Series 3 Sedan Land Rover Defender 90, 110; Range Rover Classic (93-96); Discovery 1 (94-98); Freelander (97-04) Related Video: Featured Gallery Jaguar Land Rover Classic Infotainment System News Source: Jaguar Jaguar Land Rover Technology Infotainment