At-a-glance
- Jaguar is introducing two additional forced-induction petrol engines to its range for the 2013MY; the new 3.0-litre V6 250kW Supercharged Petrol, and the four-cylinder 2.0-litre 177kW Turbocharged Petrol.
- The respective supercharging and turbocharging technology used in each engine means they offer efficiently delivered high-specific power and torque outputs
- The 3.0-litre V6 Supercharged Petrol (3.0 V6 S/C) draws on key technology used in Jaguar’s award-winning 5.0-litre V8, and has significantly higher specific performance than the naturally-aspirated version of that engine
- The 3.0 V6 S/C 250kW version will be offered in XF and XJ models
- The 2.0-litre produces 177kW and 340Nm, offering greater performance than Jaguar’s existing naturally-aspirated V6 engine, but with four-cylinder economy
- The 2.0-litre will replace the 3.0-litre naturally-aspirated petrol AJ-V6 in XF.
- Both engines deliver their power through smooth shifting eight-speed automatic transmissions – now available across the XF & XJ model ranges.
- The 3.0 V6 S/C and 5.0 V8 S/C will be available with Jaguar’s Intelligent Stop-Start system
Introduction
To enhance customer choice Jaguar is expanding its product offering with the introduction of two additional petrol units; the new 3.0-litre V6 Supercharged Petrol, and the 2.0-litre Turbocharged Petrol.
Adrian Hallmark, Global Brand Director, Jaguar Cars, said: “Jaguar currently has its strongest range of products for several decades. Our continued growth is dependent on two things; activating the awareness of the brand, and expanding our range to enable us to access new customers in both existing and emerging markets. The introduction of these two additional forced-induction petrol engines is integral to this ambitious plan.”
The 3.0 V6 S/C petrol engine has been developed by Jaguar powertrain experts from its existing award-winning 5.0-litre V8 – the all-alloy engine which has received plaudits from around the world in applications from long wheelbase limousines to 300km/h convertibles. The 3.0 V6 S/C shares many of the V8’s key technologies including direct injection, variable valve timing, and aluminium construction and offers comparable levels of refinement and driveability to the naturally-aspirated version of the V8 engine, but with greater specific output and efficiency courtesy of supercharging technology.
In its 250kW/450Nm guise the 3.0 V6 S/C offers the smooth, seamless performance ideally suited to a Jaguar saloon. The 3.0 V6 S/C will give performance levels matching much larger engines while remaining economy and emissions friendly.
The 2.0-litre Turbocharged Petrol engine uses a range of state-of-the-art technologies for power generation that belies its size, and its introduction to XF models will see it installed in north-south orientation. It produces 177kW and 340Nm thanks to the use of three key innovations; low-inertia turbocharging, direct fuel-injection and variable timing of both the intake and exhaust camshafts.
Ron Lee, Group Chief Engineer Powertrain, Jaguar Cars, said: “Both the 3.0 V6 S/C and 2.0 Turbocharged make intelligent use of forced-induction technology to produce high-specific output in an efficient way, while delivering the compelling combination of flexibility, refinement and driver reward that are integral attributes in all Jaguar engines.”
Both engines will be mated to the eight-speed automatic transmission that offers a broad spread of ratios for a perfectly balanced combination of smooth-shifting, economy and driver control. The 3.0 V6 S/C and 5.0 V8 S/C come standard with Jaguar’s Intelligent Stop-Start system.
3.0-litre V6 250kW Supercharged Petrol
Jaguar has established itself as a leader in the field of supercharged induction technology in order to extract the highest efficiency from its powerplants. Currently, supercharging is used to greatest effect in the XKR-S which produces 405kW and 680Nm from its acclaimed 5.0-litre V8 engine.
The new quad-cam V6 shares its all-aluminium construction with the V8, with the lightweight die-cast block supplemented with cross-bolted main bearing caps to increase rigidity and therefore refinement. The four-valve cylinder heads are constructed of recycled aluminium.
The valves themselves are subject to control by a dual independent variable cam timing (DIVCT) system which is activated by the positive and negative torques generated by the movement of the intake and exhaust valves. This variable timing system features actuation rates of more than 150 degrees per second throughout the rev range, to optimise power, torque and economy at all engine speeds.
This responsive and uninterrupted power delivery is made possible through the use of spray-guided direct injection (SGDI) which delivers precisely measured quantities of fuel directly into the centre of the combustion chambers at pressures of up to 150bar. The fuel is delivered several times during each combustion cycle, creating a more homogenous air-fuel mixture for cleaner and more efficient combustion.
This is aided by an innovation new to this engine to maximise combustion efficiency; spark plugs which are precisely oriented both in relation to the injector and within the combustion chamber. The compression ratio is also raised from 9.5:1 in the supercharged V8 to 10.5:1, further improving fuel economy and reducing emissions.
Mounted in the ‘V’ of the engine is latest-generation Roots-type twin vortex supercharger, its use key to the 3.0 V6 S/C’s high-specific output and efficiency. More compact than the model used with the V8, a water-cooled intercooler reduces the temperature of the intake air to optimise power and efficiency. New to the 3.0 V6 S/C is that the supercharger boost control is electronically supervised by new Bosch engine management software, offering efficiency gains of up to 20 per cent.
In creating the new 3.0 V6 S/C, Jaguar’s engineers devised an innovative system of counter-rotating front and rear balancer weights which lend it the same smoothness and refinement characteristics as its larger V8 brother.
The 3.0 V6 S/C powertrain is completed by the Jaguar-tuned eight-speed automatic ZF transmission.
In the XF and XJ the 3.0 V6 S/C will replace the naturally-aspirated version of the 5.0-litre V8 for the 2013 Model Year. The 3.0 V6 S/C produces 250kW at 6500rpm and 450Nm of torque between 3500 and 5000rpm.
In the XF, this results in 0-100km/h in 5.9 seconds and a top speed limited to 250km/h. Returning a combined fuel economy of 9.4l/100km, the XF emits just 224g/km of CO2.
In its XJ application, the 3.0 V6 S/C accelerates to 100km/h in 5.9 seconds and a limited top speed of 250km/h. The XJ returns a combined fuel economy of 9.4l/100km and emits 224g/km of CO2.
2.0-litre i4 177kW Turbocharged Petrol
The introduction of the 177kW petrol engine to the Jaguar range in XF marks a key response to the growing demands of legislation and customer demand alike. The 2.0 Turbocharged used in the XF sees it oriented in north-south configuration and mated to the same smooth-shifting eight-speed transmission used on the 3.0 V6 S/C.
Producing 177kW at 5500rpm the 2.0 Turbocharged offers flexible delivery, and with an ‘as-shipped’ weight of 138kg courtesy of compact dimensions and all-aluminium construction it is also the lightest Jaguar engine ever. This small mass aids dynamic agility while, of course, bringing further emissions and economy benefits.
The 2.0 is an engine that retains all the true Jaguar qualities of muscular potential, refinement and soul-stirring character with far better efficiency than a larger capacity multi-cylinder engine that would traditionally have been required to produce similar levels of power.
Despite its small capacity, the 2.0 Turbocharged uses of a low-inertia turbocharger that enables it to produce its high-specific power and torque outputs. The 2.0’s turbocharger is fed via a lightweight thin-walled exhaust manifold which allows for a shorter engine warm-up period and therefore lowers emissions still further.
In order to provide the muscular usability characteristics required, chain-driven variable timing is applied to both the intake and exhaust valves to maximise the broad spread of torque, strong bottom-end performance and outstanding drivability.
Designed from the outset with the goal of enhanced efficiency, the engine features specialised coatings on the piston rings and tappets in order to reduce unwanted internal friction. This same thinking led to the adoption of very precisely controlled direct injection technology. Fuel is injected in precisely measured doses several times during each combustion cycle to ensure the most efficient possible burn with the maximum benefit in terms of power generation and the lowest fuel consumption and emissions.
Jaguar levels of smoothness and sophistication have been achieved through the use of twin balancer shafts while significant steps have been taken to ensure expected levels of refinement. Amongst these are active engine mounts, an acoustic cover and the use of high density foam for additional sound deadening.
The 2.0 Turbocharged introductions will be key to meeting customer demand in the South African market and replaces the existing naturally-aspirated Jaguar 3.0-litre V6 engine.
In the XF this engine is capable of accelerating to 100km/h in 7.9 seconds and on to 241km/h while at the same time achieving 8.9l/100km on the EU combined cycle and CO2 emissions of 207g/km.
ZF eight-speed automatic transmission
The entire Jaguar XF and XJ range now run ZF’s acclaimed eight-speed automatic transmission with distinctive Jaguar mapping and treatment. This transmission’s large spread of ratios allows the various engines’ prodigious power to be fully exploited while optimising economy and emissions.
Intelligent Stop/Start
Efficiency is also boosted by the petrol engine’s compatibility with Jaguar’s Intelligent Stop-Start system which improves fuel consumption by up to seven per cent on the EU combined cycle. Utilising a twin solenoid starter, the system is able to restart the engine in less time than it takes for the driver’s foot to move from the brake to the accelerator, and in engine rundown ‘change of mind’ scenarios it is able to reenergise the engine via rapidly refuelling the cylinders.
2013MY Jaguar XF Saloon Technical Specifications
All figures are manufacturer’s estimates and correct at time of going to press
2013MY Jaguar XJ (SWB) Technical Specifications
All figures are manufacturer’s estimates and correct at time of going to press
