Tesla's much anticipated Roadster has been spotted testing at a factory test track in America.

Twitter user Shehryar Khan managed to capture footage of the car as it sped off at the Fremont test track.

It's not clear what speed the car managed to get up to, but it's clear that the footage impressed those taking it.

SHEHRYAR KHAN /TWITTER A quick drop and acceleration at a factory test track shows the Tesla Roadster means business.

Shehryar Khan shared his excitement, tweeting "ROADSTER I LOVE ELON MUSK."

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The $293,427, all-wheel drive supercar goes 0-95 kmh in 1.9 seconds, making it the fastest production car ever.

Oh, and it tops out at more than 400kmh.

