Fernando Alonso endured a peak impact of 46G in his heavy crash with Esteban Gutierrez at the Australian Grand Prix and was travelling at 305kph at the point of collision.

In the immediate aftermath of the crash, the McLaren-Honda driver had been considered extremely fortunate to walk away in Australia which saw both his and Gutierrez's car obliterated in the accident, although Alonso was forced to sit out the Bahrain Grand Prix due to broken ribs.

In an extensive analysis and review of the crash completed by the FIA to understand more on what happens to a driver in a high-speed accident, data and video evidence from Alonso's car has revealed the full impact endured.

The FIA has used a new rear-facing high-speed camera to shed light on a driver in the cockpit, plus data recorders and in-ear accelerometers - used in the analysis of the tragic death of Jules Bianchi - recorded the forces and speeds the driver sustained.

It has been confirmed Alonso was traveling at 313kph when he attempted an overtake on Gutierrez, with the initial impact speed slowing fractionally to 305kph.

With his front-right suspension destroyed, Alonso's car veered left and struck the wall causing a peak lateral deceleration of 45G. Rebounding off the wall the car slid into the gravel trap and the damaged left-side of the car dug into the ground causing it to roll and spiking a second lateral deceleration of 46G.

After one-a-half rotations flying through the gravel trap Alonso experienced a final surge of longitudinal acceleration of 20G before coming to a rest just before the tyre barrier.

"The fact that he was relatively unharmed - suffering only minor injuries which forced him to miss the next race - is testament to the safety elements in the car that have been developed over the last 20 years," the report concluded.