Bob.
Member Since: 02 Feb 2009
Location: SWest
Posts: 275
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This edited extract from the LR press release for 2012MY might help but it won't tell you whether a Hitachi or AMD compressor is fitted 
Range Rover Sport in 2012
More power, reduced CO2, an 8-speed transmission and improved interior features for the Range Rover Sport in 2012
• Power increased to 256PS on higher power 3.0-litre diesel
• Substantial CO2 reductions to EU5 diesel engine range
• New ZF 8-speed automatic gearbox with rotary gear shift selector and paddle shift
• Dual View touch-screen available for the first time
• WhiteFireTM wireless technology enhances rear seat entertainment
• Introduction of MOST Gen 2.1 electrical architecture
• 825W audio system powers the Premium Harmon Kardon LOGIC 7
• 'Say What You See' voice command system
• New powered tailgate
• Revised interiors and enhanced design for Autobiography and Limited Edition
The exceptional 3.0-litre V6 diesel engines in the iconic Range Rover Sport now offer even greater efficiencies, with reduced CO2, improved fuel economy and an increase in power for 2012. The output of the more powerful 245PS engine has been increased to 256PS with CO2 emissions reduced from 243g/km to 230g/km; whilst CO2 emissions for the entry level 211PS engine have been substantially reduced from 243g/km to 224g/km, thanks to a low-flow fuel injection system.
These improvements are partly due to the introduction of the new, highly-efficient,
ZF 8HP70, 8-speed automatic gearbox, combining smooth shifting and improved fuel economy. The combined fuel consumption for the 211PS engine has been reduced from 30.7mpg to 33.2mpg and the 256PS engine from 30.7mpg to 32.1mpg. In conjunction with the new 8-speed gearbox, the Range Rover Sport comes equipped with the rotary gear shift selector and steering wheel-mounted paddle shift.
More power and reduced emissions for 2012
The latest version of the entry level 3.0 LR-TDV6 diesel delivers 211PS at 4,000rpm and 520Nm torque at 2,000rpm with CO2 emissions reduced from 243g/km to 224g/km thanks partly to a new, low-flow fuel injection system. Output of the 245PS engine has been increased to 256PS at 4,000rpm with maximum torque of 600Nm at 2,000rpm and a reduction in CO2 from 243g/km to 230g/km.
Both versions of the 3.0-litre diesel are equipped with the same parallel sequential turbocharging system. Throttle response is staggering with maximum torque available from only 2,000rpm. The 3.0-litre diesel can significantly out perform its rivals by delivering 500Nm in only 500 milliseconds from idle. This means drivers have instantaneous access to 83 percent of maximum torque. When it was introduced in 2010, the parallel sequential turbocharging system was the first of its kind to be fitted to a V-engine anywhere in the world. The twin turbochargers work sequentially to provide best in class torque at low speeds and pack a huge punch at high speeds.
Driving a turbocharger requires pressure from the exhaust, creating pumping losses in the engine and increasing fuel consumption. To minimise this effect, valves isolate the secondary turbocharger both from the exhaust stream and the engine inlet tract when it is not required. A balance pipe connecting the two manifolds allows the gas from both manifolds to feed through the primary turbocharger. A variable geometry, medium-sized turbocharger is in use most of the time during average acceleration and up to motorway cruising speeds and performs with no discernible lag. It is a more efficient system than series turbocharging in which the smaller primary turbo increases pumping losses.
The 3.0-litre diesel set new standards of refinement and fuel economy with its third generation common rail fuel injection system. Operating at 2,000bar, the piezo injectors are designed to minimise noise while optimising combustion. The system operates in ‘metering mode’ supplying just the right amount of fuel to the injectors rather than returning it to the tank and wasting pumping energy in the process. All diesel models are now fitted with a DPF and have an advanced EGR system to reduce NOx.
Highly-efficient ZF 8HP70 automatic gearbox
Fitted to EU5 versions of the 3.0-litre diesel engine, the remarkable ZF 8HP70 transmission delivers unrivalled response for driving pleasure while driving fuel consumption and CO2 emissions down to an all-time low. Eight speeds provide closer ratios and a greater overall ratio spread, while the higher overdrive ratio compliments the huge torque of the 3.0 LR-SDV6, reducing fuel consumption and CO2 emissions. Efficiency is further improved by the internal mechanical layout of the 8HP70 which means that no more than two internal clutches are open at any one time.
The 8HP70 is packed with energy saving features. The hydraulic actuating system is more efficient too, the hydraulic pump drawing less energy from the engine. The torque converter is calibrated to lock-up at lower speeds and operating temperature, reducing fuel consumption and once again taking advantage of the 3.0-litre diese engine's immense low-end torque. Transmission Idle Control seamlessly and transparently selects neutral when the car is stationary and the engine idling in drive, reducing drag on the engine and saving fuel. The 8HP70 has brains too. In hot conditions it selects a lower gear to run the engine and air conditioning pumps faster to cool down the cabin quickly. In cold conditions it runs the engine faster to reduce warm-up time and emissions.
Apart from CO2-busting efficiency improvements, the 8HP70 offers performance benefits too. Taking just 200 milliseconds to complete the entire shift event, the 8HP70 gears change with an imperceptible interruption of torque for smoothness equalling that of a dual-clutch transmission, while providing a more sophisticated driving experience. The 8HP70 matches the engine speed to its turbine speed in anticipation of oncoming downshifts for an absolutely smooth transition from one ratio to the next. Closer ratios also contribute to making individual shifts smoother.
Driver Type Detection monitors driver inputs and the car’s systems to optimise the response of the gearbox to the driver’s style, while Curve Detection makes sure the gearbox avoids unwanted upshifts and holds on to the same gear when taking a sequence of bends. The gearbox also monitors the driver’s use of the brake together with the rate of deceleration to set up the correct gear for entry and exit to the corner. The 8HP70 does not have to change to a lower gear sequentially and can skip up to six ratios if necessary, for much faster response when preparing to overtake.
Driver controls include steering wheel paddles as standard enabling the driver to take control of gear shifting manually. The CommandShift lever is replaced by a rotary knob for selecting park, reverse, neutral, drive or sport modes, the last of these optimising the gearbox response times for maximum acceleration, improved response and sharper upshifts. The selector knob is flush with the centre console when the ignition is switched off, rising up when it is switched on. To avoid confusion, the Terrain Response Rotary Switch is replaced by a new Terrain Response Optimisation Switch. "The new 8-speed transmission is a perfect match for our 3.0-litre diesel engine. The additional ratios combined with skip shifts mean the engine is always working in the most efficient part of its operating range," said Paul Walker, Chief Programme Engineer.
Advanced chassis, brakes and suspension
As standard on the Range Rover Sport 5.0 LR-V8 supercharged petrol and as an option on the 256PS 3.0 LR-TDV6 only, an Adaptive Dynamics system is available which operates in conjunction with the existing Dynamic Response system. With Adaptive Dynamics, DampTronic Valve Technology™ replaces conventional dampers and monitors damper pressure 500 times a second, continuously adapting to surface conditions and driving style thanks to an active valve technology. The chassis is complemented by high performance braking systems which include four-piston opposed calliper front disc brakes on the diesel models and lightweight aluminium, six-piston Brembo callipers for the supercharged models. A variable ratio steering rack improves stability in high speed cruising and increases driver involvement on twisting roads. The high performance character of the Range Rover Sport chassis is further emphasised by the Roll Stability Control system which responds to steering inputs from the driver and intervenes by braking individual wheels if the possibility of a rollover is detected.
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Sat Sep 21 2013 8:55am
