The 1993 Auto Trader RAC British Touring Car Championship season was 36th British Touring Car Championship (BTCC) season.
At the end of 1992 BMW GB withdrew from the championship after the rules had been changed in a direction which BMW felt disadvantaged them. Prodrive, which had run the works operation for BMW, picked up their now famous Subaru contract to build rally cars. Prodrive had been expected to be entering a works Mercedes Benz team in cooperation with AMG, running the C-class. Prodrive stalwart Tim Sugden and Bernd Schneider were due to drive for the team. The plans were for a late season appearance leading to a full challenge in 1994, but this eventually came to nothing.Vic Lee Motorsport was liquidated after owner Vic Lee’s drug scandal. The assets of the team were taken over by Steve Neal and Ray Bellm, who picked up personnel from Euroracing’s discontinued sports car effort and merged it into Neal’s Rimstock Racing outfit, creating Team Dynamics. Bellm would sell his share in the team later in the year, leaving Steve Neal as the only owner. The team started the 1993 season with three 1992-spec 318iS cars piloted by Matt Neal, Ray Bellm and Alex Portman, later dropping down to two.
Only weeks after BMW GB withdrew from the BTCC, BMW withdrew their Schnitzer Motorsport-run works operation from the German DTM championship, also there because of their disagreement with new rules. With few other series to contest in Schnitzer Motorsport were sent over by BMW to the British championship along with works drivers Steve Soper and Joachim Winkelhock.
Andy Rouse had lost his Toyota contract to famous Toyota tuners TOM'S Norfolk-based European arm known as Tom’s GB, who had previously run Group A Toyotas in BTCC in the eighties. Andy Rouse’s seat was taken over by Julian Bailey, and the new shape Carina E GTi replaced the older model. Toyota also supported a junior team run by Park Lane Racing, who would run two older shape Carinas for James Kaye and Bobby Verdon-Roe. Rouse himself had landed a Ford works deal, but the new Mondeo would not appear until after the season had started.
Vauxhall retained their John Cleland / Jeff Allam line-up in the Vauxhall Cavalier and their Ecurie Ecosse semi-works team; at Ecurie Ecosse David Leslie retained his seat and was after a few races joined by fellow Scotsman Harry Nuttall. Peugeot added Eugene O’Brien and Ian Flux to Robb Gravett for a three-car line-up in the Peugeot 405 Mi16 (with Flux’ car being run by Roy Kennedy Racing); Nissan ran three cars for Keith O'Dor, Win Percy and Tiff Needell, and Mazda returned with Patrick Watts in a brand new Xedos 6. Renault was the new manufacturer to join the championship with Alain Menu and reigning champion Tim Harvey as their drivers in the Renault 19 16v