Bali prosecutors to appeal Sara Connor's sentence

Prosecutors will challenge Australian Sara Connor's four-year sentence over the fatal assault of a Bali police officer, saying it is too short.

They are not, however, planning to appeal the six-year term handed to her British boyfriend David Taylor.

Prosecutor Anak Agung Jayalantara said on Friday that they thought the sentence meted out to the 46-year-old mother of two on Monday was "unfair".

Her sentence was half of what prosecutors had called for and two years less than what her British boyfriend David Taylor received.

"Sara should receive a sentence that is not too much different (from his) or at least more than a half of what we requested.

"For David there is no instruction to go for appeal yet."

All parties have until Monday to formally lodge an appeal.

Connor's lawyer Erwin Siregar told AAP he had informed her family of the decision but had not heard back.

He is expected to meet with her at Kerobokan prison on Monday to discuss what to do next.

As prosecutors have said they will appeal, Mr Siregar said he plans to suggest to Connor she should also challenge the verdict and sentence.

"Of course the decision is in Sara's hands. I will explain to her the consequences (of that)."

Taylor became involved in a fight with Mr Sudarsa after the British man confronted the police officer about Connor's lost purse on the night of August 16.

During the melee, Taylor hit Mr Sudarsa with his walkie talkie, his binoculars and whacked him across the head with a beer bottle.

Connor, Chief Judge Made Pasek found, had not simply tried to separate the pair as she claimed throughout their trial but had effectively pinned Mr Sudarsa down briefly so he could not fight back.

She later cut up Mr Sudarsa's cards because of "guilt over what she did", the court found.

In the early hours of August 17 - Mr Sudarsa's bloodied body was discovered, covered in sand, with dozens of wounds to his head, chest and neck.