Complex sentence: Adelaide's Phil March won in his Nissan powered Speedcar in 1985 and also won the Sprintcar championship in 1999 while Sydney's Robbie Farr won the 1997/98 Speedcar title and the 2003/04 Sprintcar championship.
Split into simpler sentences: Adelaide's Phil March won in his Nissan powered Speedcar in 1985, and also won the Sprintcar championship in 1999. The third driver was Sydney's Robbie Farr who won the 1997/98 Speedcar title and the 2003/04 Sprintcar championship.