Wannon MP Dan Tehan this week announced an additional $178.2 million contribution to the Australian Government Regional Rail Revival Package, which will be supported by a $129.1 million state government investment.

A statement sent from Mr Tehan's office said the additional funding to the original $104 million federal government investment would be provided to the Warrnambool line upgrade.

"It will address cost pressures and enable the project to be completed by the end of 2021," it says.

But Mr Tehan's office could not specify how much money would actually be allocated to the Warrnambool line upgrade, which was first announced in July 2017 and was supposed to be completed in 12 to 18 months.

The Standard contacted the state government but an exact dollar amount was not provided.

Information obtained from a media spokesman revealed the upgrade included 12 level crossing upgrades, a crossing loop at Boorcan, signalling upgrades and a fifth weekday return service - all of which were announced in the first round of funding almost three years ago.

The Standard asked the state government to specify what the additional money would fund and whether there was a failure to stay on budget but no response was given.

The VLocity trains announced by the state government more than 1000 days ago were expected to cut up to 20 minutes off travel times between Warrnambool and Melbourne

Premier Daniel Andrews visited the Warrnambool train station in July 2017 and said the $114 million works would take 12 to 18 months, meaning it would be completed in 2019 at the earliest.

But Minister for Public Transport Infrastructure Jacinta Allan told The Standard in January that the works were now expected to be completed by late 2021 and the high-speed VLocity carriages would not run on the line once the upgrades were finished.

Ms Allan said "the line was in much worse condition than what was initially anticipated".

The Standard has repeatedly asked the state government when the high speed carriages would run on the line but no date has been given.

Have you signed up to The Standard's daily newsletter and breaking news emails? You can register below and make sure you are up to date with everything that's happening in the south-west.