Burswood is the best spot for Western Australia's new $1 billion football stadium, according to West Coast Eagles coach John Worsfold.

In a major blow to the WA Labor election gambit of scrapping the Burswood project in favour of a return to the current site of Subiaco, Perth's favourite footballing son has put his backing into the state Liberal's plan of a massive development next to James Packer's Crown Casino.

"It seems to be that the stadium we need has got the space and capacity at Burswood," Worsfold told ABC radio.

"From what I read, there is a lot of restrictions at Subiaco to what we can do, and in term of developing further in the future.

"This is such a massive investment for the state that we need to put it in the spot that means in 20 years down the track, we are not saying we want to do this but we can't because we are restricted."

In one of the opposition's deliberate points of difference during the election campaign, WA Labor leader Mark McGowan said he could save $300 million by building the new AFL stadium at Kitchener Park in the western suburb of Subiaco instead of at Burswood to the city's east.

The plan was part of Labor's attempt to find billions of dollars in saving to fund its ambitious Metronet rail project.

Mr McGowan said the Burswood option was significantly more expensive, hampered by limited public transport and parking options, and had no capacity to hold big weeknight and Friday night games.

"It also delivers thousands of men and women to the state's casino rather than the small businesses of Subiaco and Leederville," he said.

Premier Colin Barnett has been staunch in his belief in the Burswood site, saying it is capable for expansion up to 80,000 seats in the future.