The Porsche in which Paul Walker was travelling at the time of his death, reached a speed of 93mph before crashing and bursting into flames, killing the actor and his friend, an L.A Country Sheriff's investigation has found.

Paul WalkerPaul Walker Died From A 93mph Crash

Using surveillance videos and electronic data retrieved from the car's computer - with the help of Porsche - investigators were able to find the rate of speed that Roger Rodas reached before crashing on a curvy road in Santa Clarita on November 30, 2013, reports the Los Angeles Times.

"Investigators determined the cause of the fatal solo-vehicle collision was unsafe speed for the roadway conditions," said Cmdr. Mike Parker of the Los Angeles County Sheriff's Department.

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Investigators also determined that a pair of 9-year-old tyres contributed to the crash, not a mechanical failure. There was no evidence to suggest that the Porsche Carrera GT had any braking problems.

Rodas was in fact a veteran race car driver, though the speed of the car on the tight bend proved too much and it careered into the Santa Clarita business park - killing both occupants of the vehicle almost instantly. 

Paul WalkerPaul Walker at the 'Fast and Furious 6' Premiere in London

Walker - the star of the Fast & The Furious movies - died of "severe blunt head, neck and chest trauma" sustaining a broken arm, wrist, jaw and ribs. The fire burned his body beyond recognition. Rodas suffered similar injuries and a fractured skull.

After reviewing numberous security videos from around the business park, investigators found no evidence that the pair were racing against any other vehicle.

Skid marks revealed the car spun out of control, hit the sidewalk and smashed into a tree and light post with tremendous force. 

The 2005 Porsche Carrera GT is capable of reaching 100 mph in less than seven seconds.

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Watch Paul Walker speaking in the 'Hours' featurette: