A Lamborghini that hit and killed an Adelaide teenager was seen to "fishtail" earlier in the day, a court has heard.
Sophia Naismith, 15, died in June 2019, while walking on a footpath outside a Chinese restaurant at Glengowrie in Adelaide's west with her friend, who was also injured in the crash.
Alexander Campbell, 37, has pleaded guilty to driving without due care, but not guilty to causing death and harm by dangerous driving.
Mr Campbell is expected to go on trial in the District Court on Friday before Judge Paul Muscat.
In a pre-trial hearing, prosecutor Kos Lesses told the court the Elizabeth Park man used "harsh" and "deliberate" acceleration before losing control of the Lamborghini Huracan and mounting the kerb.
Mr Campbell was driving under the speed limit at the time of the crash.
Mr Lesses told the court, Mr Campbell had owned the sports car for at least four months and should have known how the vehicle behaved.
But he told the court witnesses saw Mr Campbell lose control of his sports car earlier that day in Adelaide's north, with the Lamborghini "drifting or slipping to its left".
"The defendant must have known that when the vehicle was subject to certain speed or accelerating in a particular way when driven in sports mode, that it would lose rear wheel traction and lose control," Mr Lesses told the court.
"He knew full well that that could happen because it happened that very evening, probably within minutes of leaving his house."
Mr Lesses also told the court there was evidence he accelerated "in a harsh and dramatic manner" just prior to the fatal crash.
"He was driving essentially side-by-side with one of his friends from the car event and at the crucial moment, one witness sees the car accelerate, another witness hears a very large engine sound," Mr Lesses told the court.
"And that particular witness says it sounded like they were accelerating at the same time.
"Whether or not they were street racing … in my submission, doesn't affect the ability to prove dangerous driving."
But Mr Campbell's lawyer Craig Caldicott asked Judge Muscat to rule out those witnesses' evidence as there was "a disconnect" between the time and place of the fatal crash.
Mr Caldicott also asked the court to exclude the evidence of two former supercar drivers – Luke Youlden and Dean Canto — who the prosecution intended to call as witnesses.
"Mr Canto managed to crash a Lamborghini Huracan at Bathurst so he understands the handling of the vehicle and what is required in that sense," he said.
"However … they're not in the traditional sense an accident reconstruction expert or a mechanical engineer accident expert.
"Obviously these witnesses haven't driven the vehicle – I don't even believe they've inspected the vehicle."
But Mr Lesses said the race car drivers were "experienced" to talk about the different driving modes of the Lamborghini Huracan and harsh acceleration.
"What would the defence have us do, call a go-kart or rally car driver to give this evidence?" he said.
Judge Muscat has allowed the evidence of five witnesses who allegedly heard the Lamborghini accelerate and saw Mr Campbell "fishtail" at the intersection of Elizabeth Way and Main North Road, along with the evidence of the two supercar drivers.
More than a dozen family and friends of Sophia Naismith were in court for the hearing wearing red ribbons.
