Efficient, refined powertrains
The new XJ offers the choice of up to four powerful and refined engines. Heading the line-up is the supremely powerful new supercharged 5.0-litre V8, available with 510PS or 470PS, depending on model. (Jaguar’s new flagship engine, the 510PS V8, is available only in the range-topping Supersport model.) The other petrol option is the smooth and responsive 385PS naturally-aspirated V8 version, while completing the range is the formidable 3.0-litre 275PS AJ-V6D Gen III diesel. With twin sequential turbochargers, the V6 diesel marries tremendous drive with the best fuel economy and CO2 emissions in the diesel segment.
The new direct-injection 5.0-litre AJ-V8 Gen III V8 petrol engines were introduced at the beginning of 2009. They were developed from the outset to deliver significantly increased power and torque, but with improved emissions and fuel efficiency. Particular emphasis was also placed on achieving a sporting character, combining responsive low-end torque with spirited top-end performance.
The results are truly impressive. Compared to the 4.2-litre V8s in the previous XJ, power is increased by 29 percent on both the 510PS supercharged and naturally aspirated versions. The 470PS supercharged engine is 19 percent more powerful than the outgoing engine 4.2-litre engine.
Yet despite the significant performance increase, CO2 emissions and fuel economy are at the same competitive levels for both engines, which also meet stringent EU5 and US ULEV2 emissions regulations.
Advanced new V6 twin-turbocharged diesel engine
The new 3.0-litre AJ-V6D Gen III diesel uses cutting-edge technologies to deliver seamless performance with exceptional efficiency, providing the all-new XJ with the ultimate in power, response and refinement in the premium diesel segment.
For most day-to-day driving, including motorway cruising, a responsive, variable-geometry primary turbocharger does all the work, while the smaller, fixed-geometry, secondary turbo is dormant, saving energy and improving efficiency. When the engine revs climb above 2800rpm, the secondary turbo is brought on line within 300 milliseconds, smoothly and seamlessly boosting the engine output with no discernible turbo-lag or power-step.
Compared to the highly acclaimed 2.7-litre unit that accounted for up to 25 percent of XJ sales worldwide, the new V6 Diesel is 33 percent more powerful at 275PS, while torque rises by 38 percent to a substantial 600Nm.
When combined with the XJ’s lightweight structure, the performance gains are considerable. Acceleration to 60mph is accomplished in just 6.0 seconds, on the way to an electronically governed top speed of 155mph.
Advanced six-speed automatic transmission
All petrol and diesel engines transmit power through an enhanced version of Jaguar’s acclaimed electronically controlled, six-speed automatic transmission. The transmission has a fully-adaptive shift system which delivers extremely smooth gear changes and optimises performance and economy at all times. As befits a sports saloon, all new XJs feature the Jaguar Sequential Shift? system for manual gear selection, with shift paddles mounted behind the steering wheel.
The lifecycle of a vehicle
The all-new XJ takes a new approach to sustainable motoring in the luxury vehicle sector, with its lightweight aluminium body structure and advanced powertrains. It backs this up by delivering outstanding quality and extremely low cost of ownership.
Jaguar has developed its approach to sustainability by focusing on the ‘lifecycle’ of a vehicle; a more stringent approach to sustainability than standalone measures like fuel consumption or CO2 emissions.
A lifecycle approach means minimising the amount of materials used, incorporating recycled material wherever possible, using low-energy manufacturing processes, maximising durability, and making the vehicle easy to recycle at the end of its life.
Jaguar’s aluminium architecture is a significant contributor to the sustainability of the new XJ. It uses around 50 percent recycled material in the body, and plans are in place to increase that figure to 75 percent. This alone creates a saving of three tonnes of CO2 per vehicle, compared to a bodyshell made from new aluminium.
The new Jaguar XJ maintains its class-leading position even when you consider more traditional measures of sustainability, such as CO2 emissions, the 3.0-litre AJ-V6D still leads the diesel segment.
“The outstanding responsiveness and efficiency of the latest Jaguar V6 diesel and V8 petrol engines make them ideally suited to the new XJ. When combined with the vehicle’s lightweight structure, the result is intoxicating performance and impressive fuel economy.”
Malcolm Sandford, Engine Group Chief Engineer |
