Driver of Lamborghini boasts about his supercar in YouTube video before ...

A Lamborghini driver accused of running over and killing a 15-year-old schoolgirl outside a Chinese restaurant previously boasted about his supercar on YouTube.

Sophia Naismith, 15, was killed instantly when the luxury car, with the licence plate 'PSYKO', hit her on Morphett Road in Adelaide just before 10pm on Saturday.

It is alleged the driver of the $328,000 vehicle careered onto the footpath before hitting Sophia and her friend and crashing into the front door of the House of Tien restaurant.

Sophia died at the scene while her friend Jordyn Callea sustained non-life-threatening injuries and was taken to Flinders Medical Centre.

The driver of the supercar, a 37-year-old man from Elizabeth North known only as 'Alex', previously bragged about the 2017 Lamborghini Huracan LP580-2 online. 

The driver who 'lost control of his vehicle and killed a 15-year-old schoolgirl outside a Chinese restaurant' had previously boasted about his supercar in extraordinary YouTube video

The driver who 'lost control of his vehicle and killed a 15-year-old schoolgirl outside a Chinese restaurant' had previously boasted about his supercar in extraordinary YouTube video 

The car which can travel from 0km/h to 100km/h in as little as 3.4 seconds, has featured heavily on YouTube. 

In one video the owner filmed the day he purchased the car, and can he heard saying: 'Oh my god, it's not real. It doesn't feel real.'

In a second clip he exclaims: 'I'd say if [the car] had wings it would probably fly.'

It's understood the driver was in the car with his wife at the time of the crash. 

When approached by https://twitter.com/9NewsSyd/status/1142708251961614337, Alex's wife described the incident as a 'freak accident' and said her husband had been driving within the speed limit. 

She also noted her husband was 'not in a good state' following the crash.  

Prior to the incident, Alex is believed to have attended the Wintertime Show and Shine car event, located just 3km away from the crash scene.  

Sophia Naismith, 15, was killed instantly when the luxury car, with the license plate 'PSYKO', hit her on Morphett Road in Adelaide just before 10pm on Saturday

Sophia Naismith, 15, was killed instantly when the luxury car, with the license plate 'PSYKO', hit her on Morphett Road in Adelaide just before 10pm on Saturday 

The car, which can travel from 0 to 100km per hour in as little as 3.4 seconds, has featured on YouTube

 The car, which can travel from 0 to 100km per hour in as little as 3.4 seconds, has featured on YouTube

Pictures of the crash outside the Chinese restaurant show the wreckage, with its airbags deployed, after it had smashed into the building. 

Major crash investigators attended the scene and the driver was charged with causing death by dangerous driving and causing injury by dangerous driving. 

Since Sophia's death, many of her friends and family have paid tribute to the keen volleyball player.

School friend Daisy Page, 16, said Sophia and Jordyn had been best friends.

She said the pair were 'inseparable' and the 'nicest girls'.

'They always put other people before themselves. [They were] really caring, funny and really good at everything,' she told The Advertiser.

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