Anthony Reynolds of Newark received a 55-month sentence Monday. He had pleaded guilty last September to motor vehicle theft.
Prosecutors say the 18-year-old Reynolds and an accomplice were traveling in a stolen BMW when they came up behind a Porsche 911 Turbo in Newark in March 2012.
Armed with a .38 caliber revolver, Reynolds ordered the Porsche owner out of the car. But his accomplice took off in the BMW, leaving Reynolds to struggle with the Porsche's manual transmission.
The Porsche's owner flagged down police and Reynolds tried to flee on foot. But he was captured after a brief chase.