P208 CJEFAX 208 Thu 21 Oct 21:20/11    CAR OUTPUT RISES  IN SEPTEMBER  British car manufacturing output rose 11.8% year-on-year to 116,046 in September, the Society of Motor Manufacturers has announced. Total production for 1993's first three quarters increased by 8.5% in year-on-year terms to 1,043,769. However, production for export during September fell by 23.1% to 46,777 from 60,841 in 1992. Commercial vehicle production in September fell by 7.2% to 17,919 from 19,303.  Headlines 201 Currencies 250 Next N ws atur Markets Exchan e