The Hungarian tourist who killed a Kiwi pensioner has been deported.

Ferdinand Ambach was convicted of manslaughter in May 2009 for killing 69-year-old Auckland man Ronald Brown in brutal fashion.

Ambach, then aged 31, went on trial for murder but was convicted of manslaughter after saying he was provoked into the attack by an unwanted sexual advance.

After serving eight years of a 12-year sentence, Ambach has been deported back to Hungary with a decision by the Parole Board declaring he is ashamed of his behaviour and shows genuine remorse.

Ambach, who was on a tourist visa, was drinking with Brown on December 7, 2007, at a suburban Auckland bar before they went to Brown's Onehunga flat.

A violent argument erupted and Brown was bashed repeatedly with a banjo before the neck of the instrument was rammed down his throat.

He died in hospital three days later after his life support system was switched off.