The season saw a head-to-head title battle between future Formula One stars Ayrton Senna and Martin Brundle - both driving Toyota-powered Ralt chassis, prepared by West Surrey Racing and Eddie Jordan Racing respectively.
Senna built up a commanding advantage by winning the first nine races in succession, but a series of retirements for the Brazilian later in the year allowed Brundle to close the gap.
The Brit took the points lead heading into the series finale, but Senna dominated the race to secure the title.
Other notable drivers from the year included future Le Mans winner Davy Jones, BTCC star David Leslie and Senna's future Lotus teammate Johnny Dumfries.
1983 was also the final season before 'Class B' was established, offering a separate prize for those competing in older cars.