Dec 8 (Reuters) - Rio Tinto (L:RIO) Ltd RIO.AX :
* Rio Tinto update on aluminium and group capital expenditure RIO.AX
* "By the end of 2015, the aluminium product group will have delivered around $300 million of cash cost improvements"
* "Amrun will require capital investment of $1.9 billion, with most of the spending scheduled for 2017 and 2018, ahead of expected production in the first half of 2019"
* Project offers a return in excess of 20 per cent and over half its future output is already committed under off-take agreements
* "By the end of 2015,aluminium product group will have reduction of $45 million in sustaining capex and cut working capital by around $400 million versus 2014"
* Expects total capital expenditure in 2016 will be around $5 billion
* "Aluminium product group's smelting business continues to improve cost position"
* Source text for Eikon ID:nASX1lDxRV