Content Summary : HOLDEN will replace the trusty but tired V6 that has powered Commodore since mid-1988 with not one, but two all-new Australian-made V6s in August, when the facelifted VZ Commodore is launched. Dubbed Alloytec, Holden’s all-aluminium, 24-valve DOHC 3.6-litre V6 with variable valve timing will replace the current 3.8-litre cast-iron, pushrod Ecotec V6 in both VZ Commodore and WL Statesman after about 16 years of service. But as part of an uncharted, two-pronged fightback against its six-cylinder large car rivals including Falcon, Camry and Magna, Australia’s most popular model will be available in either 175kW base or 190kW premium guise. Holden will not say which engine will power which VZ (or WL) variant until next month’s official launch. But in a move believed to be aimed at keeping the new powertrain’s spiralling costs down at base level, Holden has confirmed that only Alloytec 190 engine variants will employ a new 5L40-codenamed ZF five-speed automatic transmission.