Paul Walker was travelling at over 100 miles per hour (about 160km/h) when the car he was in crashed.
The Fast And The Furious star died alongside his friend, Roger Rodas - who was driving - when their Porsche crashed and burst into flames in Santa Clarita, California on November 30.
A new report from the Los Angeles County Coroner released on Friday notes Roger was driving at an “unsafe speed” on the road - which has a designated limit of 45 miles per hour - and lost control of the car “for unknown reasons”.
After the car crashed into a tree and a lamp post “the vehicle was almost split in half ... the majority of the vehicle was also charred” by the fire which followed.
The report also states neither Roger, 38, nor Paul, 40, had alcohol, cocaine, marijuana or other impairing drugs in their systems.
It has previously been found Paul died from a combination of traumatic and thermal injuries. The report also said the actor had been in a “pugilistic” stance at the time of the crash, meaning he had braced for impact.
The resulting fire caused by the smash was so powerful only remnants of the clothing Paul was wearing at the time were intact.
Paul was laid to rest at Forest Lawn Cemetery in Los Angeles on December 14.
Still hurting from the loss of his friend, Paul's The Fast And The Furious co-star, Vin Diesel, posted a new tribute alongside a photo of them together on Facebook.
He wrote: “There was always moments of child-like laughter... We had accomplished so much by 2013... P.S. The complexities of Brotherhood, and the painful void... of it's absence.” - Bang Showbiz