Hill initially raced karts in California and Ferrari sports cars (his father won his F1 title with the team).

[1] Winning three of three races in the championship runoffs in Italy at the Mugello circuit in the Ferrari 355, Hill attracted the attention of the Alfa Romeo Factory DTM team and was invited to test the DTM car at Mugello in November 1995.

Hill competed in the US-based Barber Dodge Pro Series in 1996, finishing third overall, taking Rookie-of-the-Year honors.

The following year, he moved up to the more prestigious FIA-backed series with the DAMS team with teammate, Sébastien Bourdais, and remained there in 2002 (a part-season with Durango, replacing Alexander Müller) and 2003 (with Super Nova).

In three years, he scored a total of four points and was dropped midway through 2003 in favour of Nicolas Kiesa, who had been left without a drive due to the withdrawal of the Super Nova-run Den Blå Avis outfit.