RRI- J Sports & Sports Sedans up to 1000cc | RRI-A Sports & Sports Sedans 1001cc to1300cc |
RRI-B Sports & Sports Sedans 1301 to 1600cc | RRI-C Sports & Sports Sedans 1601 to 2000cc |
RRI-D Sports & Sports Sedans 2001 to 3000cc | RRI-E Sports & Sports Sedans 3001cc and over |
RRI-F Clubman Sports-all capacities | RRI-G Racing Cars Pre 1960 |
RRI-H Racing Cars Post 1960 | |
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