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Engines - (Australia)

August 9th, 2007

New Sorento offers a choice of two engines across the range - 2.5-litre CRDi turbo-diesel or 3.3-litre petrol V6 - that will appeal to different users for different reasons.

2.5-litre CRDi

Diesel sales in Australia have surged during the past 18 months. Since 2004, medium SUV diesel sales have risen from 18 percent to 32 percent of total sales (March 2007 YTD). This rise has been driven by unstable fuel prices and improved diesel technology which delivers better performance, driveability and economy.

New-generation diesel engines have brought strong sales growth for some of Sorento's key competitors but the new 2.5-litre turbo-diesel Sorento CRDi will find a home with many buyers wanting real, dual-range 4WD capability matched with strong towing capacity and diesel-engine economy.

Kia is committed to building best-in-class powertrains and taking on the technical challenges of designing passenger vehicle diesel engines that reduce CO2 emissions while at the same time improving driving performance.

Kia has more than 30 years' experience in designing and mass producing diesel engines for many applications. The company has been at the forefront of high speed direct injection diesel engines and continues to work towards the development of even 'cleaner' diesel powertrains in the future, including NOx after-treatment systems and more cost-competitive diesel powertrains.

The 2.5-litre Sorento CRDi engine features common rail direct injection (CRDi) by Bosch and high performance Variable Geometry Turbocharger (VGT) technology from Garrett to deliver class-leading power and torque for towing just about anything, anywhere and doing it economically.

The turbine housing in the VGT contains a set of movable vanes which adjust boost by controlling exhaust turbine inlet pressure.

At low engine speeds when exhaust flow is low, the vanes are partially closed. This increases the pressure of the exhaust pushing against the turbine blades, spinning the turbine faster to generate more boost.

As engine speed increases so does exhaust flow, and the vanes are opened to reduce turbine pressure and hold boost steady or reduce it as needed.

The Euro-IV compliant turbo-diesel produces maximum power of 125kW @ 3,800rpm and maximum torque of 392Nm @ 2,000rpm, ensuring the engine runs most often in the heart of the torque curve while still delivering up to 8.5 litres per 100kms (ADR81/01 combined cycle for five-speed manual).

More than 290Nm of maximum torque is available from just 1300rpm through to 4000rpm, beyond the point at which the diesel Sorento reaches peak power. This gives the Sorento CRDi tremendous flexibility in everyday driving and the ability to reach a maximum speed of up to 180km/h.

3.3-litre V6

The new 3.3-litre quad-cam all-alloy V6 petrol engine comes from the same family as the previously used 3.8-litre V6 engine, but is lighter and more efficient while still delivering impressive performance.

The engine features an aluminium block to reduce weight, 24 valves with Continuously Variable Valve Timing (CVVT) for improved drivability and fuel consumption, and a silent timing chain for smoother and quieter running.

The Euro-III compliant engine produces maximum power of 180kW @ 6,000rpm and maximum torque of 309Nm @ 4,500rpm, making a 3.3 Sorento capable of a top speed of 190 km/h.

A 3.3-litre Sorento can accelerate from 0-100km/h in 9.2 seconds and from 60-100 km/h in 4.9 seconds, quick enough for any driving situation.

These output and performance figures are only marginally down on those of the out-going 3.8-litre Sorento engine but come with significant improvements to fuel economy (now 10.9 litres per 100kms under the ADR81/01 combined cycle).

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