In 1971 Lakis Manticas won the inaugural "Sun-7" title driving a Morris Cooper S, with points being allocated evenly among the three engine capacity classes.

The tight Amaroo Park circuit suited the Holden Torana GTR XU-1s.

Leading Sydney-based Torana drivers, such as the Holden Dealer Team's Colin Bond, Bob Morris, Don Holland and Allan Grice were prominent in the series.

For 1975 the Sun-7 Rothmans Series was restricted to cars with an engine capacity of under 3 litres, meaning that larger engined cars such as the Holden Torana SL/R 5000 and Ford Falcon GT could no longer compete.

In the 3 litre era some of the main contenders included Bo Seton's Ford Capri, Don Holland and Allan Grice in Mazda RX-3's and Bob Morris in a Triumph Dolomite.