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"Jaguar has introduced a raft of powertrain upgrades intended to capitalize on the XJ&amp;#039;s lightweight aluminium structure to deliver more efficiency.   Out goes the five-liter V-8 and in comes a supercharged three-liter V-6 with 335 bhp and 332 lbs.-ft of torque, the highest specific output of any Jaguar engine, this engine will also power the forthcoming F-Type sports car, available from 2013.        2013 Jaguar XJ    Alongside the new powertrain line-up all models in the range benefit from re-calibrated spring and damper tunes as well as remapped damper software - offering enhanced ride isolation and passenger comfort on all road surfaces.   Teaming up with British audio specialist, Meridian Jaguar engineers have developed a 825W sound system, boasting significantly lower levels of harmonic distortion - meaning a lower power output is required to achieve the high levels of audio clarity within the vehicle. The top-of-the range 20-speaker 825W system comes as standard on Portfolio and Supersport XJ models while offered as an option on other derivatives.        2013 Jaguar XF Sportbrake    Jaguar has also announced the engine line-up for the new XF Sportbrake.   Powered by a range of powerful, yet efficient, diesel engines in 2.2- and 3.0-litre capacities, the XF Sportbrake marks the debut of new derivatives based on the 2.2-liter dieselunit. The engine is now available in 161 and 197 bhp outputs \u2013 the latter replacing the existing 187 bhp engine. Both share highly competitive CO2 emissions starting from just 135 g/km and economy of 55.4 mpg (US 46.1).        2013 Jaguar XF Sportbrake    The Sportbrake will also be available equipped with a 3.0-liter turbocharged V-6 engine in 237 bhp diesel and 271 bhp diesel S derivatives. Each emits 163 g/km of CO2 and returns 46 mpg (US 38.3) on the combined cycle. Despite its focus on versatility, in diesel S form, the XF Sportbrake accelerates to 60mph from rest in just 6.7 and 6.1 seconds, respectively.   The XF saloon and Sportbrake will both adopt the eight-speed automatic gearbox and Stop/Start as standard across the engine range \u2013 improving emissions on the V-6 diesel saloon by 6%.        2013 Jaguar XF Sportbrake    For the first time, the XF range will also be available with the Meridian audio system \u2013 replacing the Bowers and Wilkins system and promising precise yet powerful sound quality via a sophisticated amplifier and high quality speaker units.   Heading the XF range is the new XFR Speed Pack with the speed limiter raised to 174 mph, the 503 bhp XFR Speed Pack car is equipped with revised engine and gearbox calibration to match the increased top speed. A new front aero splitter and a new rear wing distinguish the Speed Pack car.   Joining the range is a new 3.0-liter supercharged V-6 engine developing 335 bhp. It replaces the naturally aspirated 5.0-liter V-8 in the XF range and is capable of accelerating from 0-60 mph in 5.7 seconds and on to a limited top speed of 155 mph, returning fuel economy figures of 30 mpg (US 24.9) on the combined cycle and emitting 224g/km of CO2. "^^<http://www.w3.org/2001/XMLSchema#string>
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