Though Scheckter would come through to earn the championship in the V12 - powered 312 T4 the T5 would demonstrate many of the handicaps Postlethwaite would be called in to address .
The V12 - powered 312 T4 is a mere updated version of the car .
Though Scheckter would come through to earn the championship in the V12 - powered 312 T4 , a mere updated version of the car , the T5 would demonstrate many of the handicaps Postlethwaite would be called in to address .