The Crown is asking the Ontario Court of Appeal to impose stricter sentences against two men in a fatal high-speed crash that killed a Toronto taxi driver.

Government lawyers argued on Friday that 21-year-olds Wang-Piao Dumani Ross and Alexander Ryazanov should receive three-year prison sentences in the January 2006 collision that killed Pakistani immigrant Tahir Khan.

In May 2007, Ross and Ryazanov received conditional sentences, with one year of house arrest and two years of probation. The men had pleaded guilty to dangerous driving.

The deadly crash occurred when Ross and Ryazanov were each driving their Mercedes-Benzes along Mount Pleasant Road as fast as 140 km/h in the 60 km/h zone.

Ryazanov collided with Khan's taxi as the cab driver was making a left turn near an intersection. The collision crushed the taxi against a pole, killing the 46-year-old immigrant from Pakistan. Khan was days away from obtaining his Canadian citizenship.

While police alleged Ross and Ryazanov were racing, their lawyers denied it.

The Crown wants the Ontario Court of Appeal to set aside the original sentences and impose three-year jail terms.

Lawyers for Ross and Ryazanov argued Friday against the move, saying the original sentences are fair and just.

A ruling should come in the next couple of months.

With a report from CTV Toronto's Chris Eby