|Jaguar is introducing two additional forced-induction petrol engines to its range for the 2013MY; the new 3.0-litre V6 Supercharged Petrol, and the four-cylinder 2.0-litre I4 Turbocharged Petrol. Their introduction will enhance customer choice in key global markets.|
- 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, including direct injection, variable valve timing, and aluminium construction, and has significantly higher specific performance than the naturally-aspirated version of that engine
- The 3.0 V6 S/C will be available in two states of tune: 380PS/460Nm and 340PS/450Nm
- In 380PS form, the 3.0 V6 S/C produces almost 127PS per litre – the highest specific output of any Jaguar engine, and will only be available in the F-type, while the 340PS version will also be offered in XF and XJ models
- The 2.0-litre I4 Ti 240 produces 240PS and 340Nm, offering greater performance than Jaguar’s existing naturally-aspirated AJ-V6 engine, but with four-cylinder economy, thanks to the use of three key innovations; low-inertia turbocharging, direct fuel-injection and variable timing of both the intake and exhaust camshafts
- The 2.0-litre I4 Ti 240 will replace the 3.0-litre naturally-aspirated petrol AJ-V6 in XF and XJ saloons.
- Both engines deliver their power through smooth shifting eight-speed automatic transmissions introduced on specific 2012MY models
- The 3.0 V6 S/C will be available with Jaguar’s Intelligent Stop-Start system
3.0-litre V6 Supercharged Petrol
Quad-cam V6 all-aluminium construction, lightweight die-cast block with cross-bolted main bearing caps to increase rigidity and therefore refinement. 4 valves per cylinder, controlled by a dual independent variable cam timing (DIVCT) system activated by positive and negative torques generated by 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.
The inherent engineering integrity of the 3.0 V6 S/C’s design meant that no alterations to the hardware or ancillaries were necessary in achieving the additional power and torque of the higher-output variant for the F-TYPE. In this higher state of tune, the 3.0 V6 S/C produces the greatest specific power output of any Jaguar engine to date; 127PS per-litre. This was achieved through recalibration of the electronic bypass of supercharger and throttle in order to increase boost without impacting emissions levels.
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 transmission from experts ZF. This transmission’s large spread of ratios allow the engine’s prodigious power to be fully exploited while optimising economy and emissions. Efficiency is also boosted by the 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.
In the XF the 3.0 V6 S/C will replace the naturally-aspirated version of the 5.0-litre V8 in all markets for the 2013 Model Year. In the XJ the 3.0 V6 S/C will replace the naturally-aspirated version of the 5.0-litre V8 in the majority of markets for the 2013 Model Year. Specific model-by-model economy and emissions figures will be issued on a market-by-market basis.
2.0-litre I4 240 Turbocharged Petrol
The introduction of the 2.0 I4 Ti 240 to the Jaguar range in XF and XJ saloons marks a key response to the growing demands of legislation and customer demand alike. The 2.0 I4 Ti 240’s use in the XF and XJ 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. Again, this transmission’s large spread of ratios maximises both performance and efficiency.
Producing 240PS at 5,500rpm (for a high specific output of 120PS per-litre) and 340Nm of torque between 2,000 and 4,000rpm, the 2.0 I4 Ti 240 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 I4 Ti 240 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. For example, the peak torque output of the 2.0 I4 Ti 240 exceeds that of Jaguar’s 3.2-litre naturally-aspirated V8 from just ten years ago.
Despite its small capacity, it is the 2.0 I4 Ti 240’s use of a low-inertia turbocharger that enables it to produce its high-specific power and torque outputs. The 2.0 I4 Ti 240’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 I4 Ti 240’s introduction will be key to meeting customer demand in global markets which currently take the XF and XJ with the existing naturally-aspirated Jaguar 3.0-litre AJV6 engine – the 2.0 I4 Ti 240 will replace this unit.
3.0-litre V6 340 Supercharged Petrol
Engine type: V6, petrol, supercharged
Capacity (cc): 2,995
Bore/stroke (mm): 84.5/89
Peak power (PS @ rpm): 340 @ 6,500
Peak torque (Nm/lb ft @ rpm): 450/332 @ 3,500-5,000rpm
0-60mph (secs): 5.7 (in XF and XJ)*
Top speed (mph): 155mph (limited, in XF and XJ)*
3.0-litre V6 380 Supercharged Petrol (F-TYPE only)
Engine type: V6, petrol, supercharged
Capacity (cc): 2,995
Bore/stroke (mm): 84.5/89
Peak power (PS @ rpm): 380 @ 6,500
Peak torque (Nm/lb ft @ rpm): 460/339 @ 3,500-5,000rpm
0-60mph (secs): figures not yet available
Top speed (mph): figures not yet available
2.0 I4 240 Turbocharged Petrol
Engine type: four-cylinder, in-line petrol, turbocharged
Capacity (cc): 1999
Bore/stroke (mm): 87.5/83.1
Peak power (PS @ rpm): 240 @ 5,500
Peak torque (Nm/lb ft @ rpm): 340/251 @ 2,000-4,000
0-60mph (secs): 7.5 (in XF and XJ)*
Top speed (mph): 150 (in XF and XJ)*
*Manufacturer’s estimates. All figures correct at time of going to press.
The 3.0 V6 S/C 340/380 and 2.0 I4 Ti 240 join Jaguar’s existing engine range comprising: 5.0-litre V8 naturally-aspirated, 5.0-litre V8 supercharged, 2.2-litre I4 Td (turbo-diesel), 3.0-litre V6 Td (twin-turbo diesel).
The 2.0 I4 Ti 240 will be offered in XF models in Europe, North America,Chinaand other selected world markets.
The 2.0 I4 Ti 240 will be offered in XJ models in theUK, Europe,Chinaand other selected world markets.
The 3.0 V6 S/C 340 will be offered in the XF and XJ in the UK, Europe, North America, China and other selected world markets.
Information and picture courtesy of Jaguar Cars