Melissa Jurie finally has a stake in a horse that can run faster than she can.

Favourite Tarzino delivered a much-coveted Victoria Derby for Caulfield trainer Mick Price on his ninth attempt to win the $1.5 million Group One race.

It was a fairytale result for Tarzino's syndicate of owners - including Price - who recently knocked back an offer of more than $1 million from Hong Kong for the colt.

Jurie bought into Tarzino last year after a run of investments in unsuccessful racehorses with her husband Jason, who died in 2011 of a heart complaint without the couple having won a Group One race.

They owned "too many that I could run faster than", Jurie told AAP.

"I'm really glad to have one that can run faster than me.

"It's an absolute dream."

Price paid $60,000 for New Zealand-bred Tarzino at the 2014 Magic Millions yearling sale and he and bloodstock manager Luke Wilkinson approached Jurie to buy into the syndicate.

"We had a lot of very unsuccessful horses and when I was approached by Luke Wilkinson and Mick Price about this horse, I said to them that this could be the Group One that my husband always wanted," Jurie said.

"It's just a brilliant run. My husband got his Group One.

"I'm really happy for Mick because it's his first (Derby win) and I'm more happy for me," she added, laughing.

Jill Taylor enjoyed great success as a part-owner of retired unbeaten sprinter Black Caviar and was overjoyed for her long-time friend Jurie.

"I couldn't be happier for her, she so deserves it," Taylor said.

Price too was elated for the "great bunch of people" who own Tarzino, which includes himself: he has 15 per cent while wife Caroline owns five per cent.

"It means a hell of a lot to them," Price said.

"To be able to do the job for them is just sensational and that's what the game's all about. It's the greatest game in the world."

Before Saturday, the trainer's best Derby result was a second in 2003 with Kempinsky.

The "racing God" heard Price's prayers on a Derby Day when early thunderstorms and heavy rain kept crowd numbers down to 85,943 compared to 90,244 last year.

"I have prayed to the racing God. He didn't hear me there for a while," Price said.

"It's just a matter of having the right horse on the day, having your work done, having the right ride, you've just got to produce."

Price predicts Tarzino could have a go at the Melbourne Cup next year.

"You'll see him in the Cox Plate, you'll see him in the Melbourne Cup. He's a really good horse."