West Midlands Police said Paul Emmerson, 38, grabbed Mohammed Miah, 22, on High Street, West Bromwich, in March and sped off with him hanging through the driver’s door window.
Mr Miah was eventually let go and left injured in the road where he died.
The police have said there seemed to be no clear motive behind the attack.
On Friday 31 August, at Birmingham Crown Court, Emmerson was found guilty of murder following a six-day trial.
The plumber from Birmingham was handed a life sentence and ordered to serve a minimum of 21 years.
At one point during Mr Miah’s ordeal, police said, Emmerson sped through red lights.
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Detective Inspector Harry Harrison said: “This was an unusual case to investigate, given that there seemed to be no clear motive for the attack.”
In a statement, Mr Miah’s sister, Shahara Kanum, said: “The emotional and physical impact that my brother’s death has had on me is forcing me to live a life I don’t recognize and become a person I don’t know.
“I will never be able to be who I was before.”
Police said a 42-year-old passenger was also charged with the murder of Mr Miah, but the case was discontinued.
