"The new XF V6 Diesel S - combining superb performance
and excellent fuel economy - sets the pace with acceleration from
0-100kph in 6.4 seconds, a maximum speed of 250kph, yet delivers an
average fuel consumption of 6.8l/100km and CO2 emissions of
179g/km: Truly the best of both worlds!"
Mike O'Driscoll, Managing Director, Jaguar
Cars
THE NEW XF DIESEL S - In Brief
- The most advanced, powerful and efficient Jaguar diesel
ever
- New 202kW high-performance XF Diesel S featuring Jaguar's new
AJ-V6D Gen III S 3.0-litre diesel engine delivers a massive 600Nm
of torque
- 0-100kph in just 6.4 seconds, a maximum speed of 250kph and yet
combined fuel economy of just 6.8l/100km - 12 percent better than
the acclaimed 2.7-litre V6 diesel engine
- Emits just 179g/km - a 10 percent reduction in
CO2. Conforms to EU5 emission regulations using
conventional exhaust after-treatment
- 33 percent more powerful and 61 percent more torque from
1500rpm than the 2.7-litre V6 diesel
"With CO2 emissions of 179g/km, 6.8l/100km average fuel
economy and 0-100kph acceleration in 6.4 seconds, this is another
great example of Jaguar delivering unrivalled performance while at
the same time taking the level of refinement in diesel engines to a
whole new level."
Mick Mohan, Jaguar Programmes Director
When it was introduced last year, the XF was recognised as a
dramatic expression of a bold new Jaguar design language. It also
soon became apparent that here was a car where the driving
experience exceeded the expectations created by the striking
appearance. Now, the new XF Diesel S takes this driving experience
to new levels, shifting the balance even further towards dynamic
performance while still retaining the XF's core values as a refined
and luxurious sports saloon.
Distinguished by discreet 'S' badging, the car that defines
Jaguar sporting luxury is even better for the 2010 model year, with
a stunning new high-performance diesel.
Powered by a 202kW engine, the Diesel S gives the XF outstanding
levels of performance, accelerating from 0-100kph in just 6.4
seconds, 1.8 seconds quicker than the excellent 2.7-litre model.
Maximum speed is electronically limited to 250kph.
Featuring parallel sequential turbochargers to help deliver the
high levels of power and torque seamlessly and with effortless
flexibility, this engine is perfectly matched to Jaguar's
sophisticated six-speed ZF 6HP28 automatic transmission.
"The new parallel sequential turbocharger system on our
new V6 diesel delivers V8 levels of performance from very low revs.
It's a power unit that offers superb flexibility and remarkably low
fuel consumption and emissions, while building on the refinement
that has become a trademark of our Jaguar diesel
engines."
Ron Lee, Group Chief Engineer, Powertrain
The acclaimed XF 2.7 Diesel has won several accolades, including
in the Drive Car of the Year "Best Luxury Car
over $60,000" Award, UK What Car magazine's 'Diesel Car of
the Year' and 'Car of the Year', What Diesel magazine's
'Diesel Car of the Year' and the Association of Scottish Motoring
Writers' Best Diesel of 2008.
Additionally, the XJ 2.7-litre Diesel was also named Britain's
greenest luxury car in the Environmental Transport Association's
2008 Car Buyers Guide for the second year running.
The XF 3.0 Diesel will be released in Australia in Quarter 3,
2009.
The new AJ-V6D Gen III S engine - In
detail
Drawing on the experience gained in designing
the original, acclaimed 2.7-litre engine, the new 3.0-litre AJ-V6D
Gen III S diesel demonstrates that it is possible to deliver
improved performance, while reducing CO2 emissions
and fuel economy. In the XF, the new engine produces 10 percent
less CO2 than the 2.7-litre, while power has
increased by 33 percent. As well as tackling CO2,
the new 3.0-litre engine meets the forthcoming EU5 regulations, due
to come into force at the start of 2011. And these great
performance leaps are achieved with combined average fuel
consumption of 6.8l/100km - an improvement on the 2.7-litre engine
of 12 percent.
Twin-turbos - maximum efficiency, instant
response
A key feature of the new engine is the unique, parallel sequential
turbocharger system, the first of its type to be fitted to a
V-engine anywhere in the world. Delivering high torque throughout
the entire engine rev range, improved throttle response and low
CO2 emissions, the twin-turbochargers work
sequentially to deliver unrivalled response and best-in-class
torque - an impressive 61 percent more than the 2.7-litre diesel
from 1500rpm - while packing a huge punch at higher engine
speeds.
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.
Driving a turbocharger requires pressure from the exhaust,
creating pumping losses in the engine and increasing fuel
consumption. To alleviate this, valves under the control of the
engine management system isolate the secondary turbocharger both
from the exhaust stream and the engine inlet tract when it is not
required.
Some twin-turbo systems rely on a smaller turbo for primary use,
only using a larger turbo when higher power is required. Though
effective, this has the disadvantage of raised exhaust pressure and
increased pumping losses. The Jaguar system uses a larger,
variable-geometry turbocharger more of the time, which not only
reduces pumping losses, but also improves fuel consumption and
CO2 emissions.
Jaguar engineers particularly focused on the issue of
turbocharger 'lag' at low engine speeds. The new AJ-V6D Gen III S
3.0-litre diesel significantly out-performs its rivals by
delivering 500Nm of torque in only 500 milliseconds from idle.
Third-generation commonrail
A new commonrail fuel-injection system delivers up to five
injections on each cycle at a pressure of 2000bar. Each injector
tip is perforated by seven holes through which finely atomised fuel
is sprayed into the cylinders. The high-pressure injection
increases power, improves economy and reduces both
CO2 and particulate emissions. New,
third-generation high-speed piezo injectors allow up to five
precise injection events during each combustion cycle, minimising
engine combustion noise.
Piezo crystal 'packs' operate each injector by expanding when an
electric current is passed through them. They react virtually
instantaneously but can make a distinctive click when fired, which
can add to diesel engine noise at idle. The crystals in Jaguar's
new injectors are fitted nearer the tip, meaning they are mounted
deeper inside the engine providing better sound insulation and
quieter operation.
Another new feature of the third-generation fuel-injection
system is the metering mode. Traditional diesel commonrail fuel
pumps oversupply the injectors, with the surplus being returned to
the fuel tank. During this process, fuel temperature increases and
cooling it again consumes considerable amounts of energy. In
metering mode, the pump delivers fuel to the injectors only at the
rate required. Consequentially, there is no rise in fuel
temperature and no wasted energy.
Compact, light and clean
The two cylinder heads, with four valves per cylinder, are made
from aluminium and the cylinder block is made from compact graphite
iron (CGI). The higher tensile strength of CGI makes it possible to
cast a smaller block; some 80mm shorter than a conventional 'grey'
cast iron equivalent.
The new, water-cooled, exhaust gas recirculation system (EGR),
important for reducing pumping losses and emissions of NOX in a
diesel engine, is more efficient and consumes less power than the
2.7-litre unit. The valves that allow exhaust gas into the system
are located on the 'hot side' of the engine nearest the exhaust
manifolds; these valves never cool while the engine is running, so
there is no condensation of combustion deposits which occurs on
engines fitted with 'cold side' valves, hence the EGR system always
works at maximum efficiency. Since the EGR cooling is so effective,
exhaust gasses can bypass the system and return to the exhaust
pipes, allowing faster engine warm-up from start-up and reducing
emissions still further.
EU5 emissions regulations have been achieved ahead of the 2011
legislative timetable using conventional diesel oxidation catalysts
and diesel particulate filters (DPFs). NOX levels are reduced at
source through the combustion system design, the addition of the
new commonrail injection system and the new EGR system with
by-pass. As a result, specialised NOX exhaust after-treatment is
unnecessary, avoiding a potential cost and the need to use
additional precious metals in the exhaust system.
Remarkably quiet for a diesel
The CGI cylinder block and new piezo injectors reduce combustion
noise in the engine. Multiple, precise injections of fuel on the
combustion stroke also reduce combustion noise and all engine
covers including camshaft covers, front covers and the sump have
been optimised to subdue radiated noise. Engine enclosures have
been ribbed to minimise radiated noise and the sump pan is
manufactured from sound deadening steel (SDS), comprising a polymer
layer sandwiched between two layers of steel.
Internal friction, a major contributor to unnecessary fuel
consumption, has been addressed by careful optimisation of the
crankshaft, valves and pistons. All these features combine to make
the new Jaguar AJ-V6D Gen III S engine amongst the quietest premium
diesels on the market.
A major step forward
With its parallel sequential turbocharger system, third-generation
commonrail fuel injection system and fully optimised EGR system,
the new 3.0-litre AJ-V6D Gen III S diesel sets new class standards
when it comes to power, response and refinement in the premium
diesel segment.
"The new XF challenges the rules and redefines Jaguar
sporting luxury. Our designers and engineers have worked together
to develop elegant, inspired solutions to complex technical
challenges. It's a simple but very effective philosophy and the
result is great new products like the new 3.0-litre diesel
XF."
Mike O'Driscoll, Managing Director, Jaguar
Cars
For further information please contact:
Tim Krieger
Marketing and Public Affairs Manager
Jaguar Australia
Phone: (02) 9020 1505
Email: tkrieger@jaguar.com
Website: www.jaguar.com.au
Anthea Karpathakis
Marketing and Public Affairs Specialist
Jaguar Australia
Phone: (02) 9020 1507
Email: akarpath@jaguar.com
Website: www.jaguar.com.au