Mazda mx5 na vs nb vs nc. Mazda warned it doesnt want any ten tenths stuff but theres enough rope on offer to have a decent blast and learn how the mx 5s magic has evolved over three decades. 1989 kicking off is mazdas original hit the 1989 mx 5 or na series as its known among trainspotters. Mx 5 generations na vs. Thanks to its better breathing engine grippier 19550r15 tyres and its still trim 1026kg weight the nb mx 5 is clearly the best balanced and quicker in the tight stuff.