Mr Poynton's son Tom, 25, suffered serious leg fractures in the accident in Linton, Derbyshire, last April.
Tom, a cricket player for Derbyshire, had taken the car for a spin himself just moments before the crash.
The Ferrari was owned by Derbyshire County Cricket Club chairman Chris Grant, who had bought the car on the day of the accident.
PC Ian Phillips told Derby and South Derbyshire Coroner's Court yesterday that 'regardless of his experience', Mr Poynton would not have been able to 'sufficiently' reduce his speed before the crash on the evening of April 4.
The police officer said: 'In my view, the collision occurred as a result of an error on the part of the driver, who had driven the vehicle for no longer than four minutes and, regardless of his experience, he was unable to reduce his speed sufficiently for the bend.'
He added that it was not possible to estimate the speed of the car on impact, but the damage suggested it was travelling fast. The car boasts a 0-62mph acceleration time of less than 3.4 seconds.