▁gover ning ▁body , ▁the ▁F édération ▁Intern ationale ▁de ▁l ' Autom obile ▁( FI A ). ▁ ▁The ▁engine , ▁co - develop ed ▁by ▁N iss an ▁and ▁Cos worth , ▁is ▁a ▁▁ 6 0 - deg ree ▁V 6 ▁with ▁dual ▁tur bo charg ers ▁and ▁direct ▁injection , ▁and ▁is ▁seen ▁by ▁N iss an ▁as ▁the ▁most ▁fuel ▁efficient ▁design . ▁ ▁Be hind ▁the ▁engine ▁and ▁beneath ▁the ▁co ck pit ▁is ▁a ▁kin etic ▁energy ▁recovery ▁system ▁using ▁two ▁fly w he els ▁developed ▁by ▁Tor ot rak . ▁The ▁fly w he els ▁gain ▁energy ▁from ▁the ▁use ▁of ▁the ▁front ▁bra kes ▁then ▁dis charg es ▁that ▁energy ▁back ▁to ▁the ▁front ▁whe els ▁via ▁a ▁driv esh aft ▁running ▁over ▁the ▁top ▁of ▁the ▁comb ust ion ▁engine . ▁The ▁fly w he els ▁can ▁also ▁output ▁power ▁to ▁a ▁secondary ▁driv esh aft ▁which ▁is ▁connected ▁to ▁a ▁limited - s lip ▁differential ▁at ▁the ▁rear ▁of ▁the ▁car ▁which ▁fe eds ▁ep icy clic ▁g ear box es ▁located ▁in ▁each ▁rear ▁wheel ▁hub , ▁allowing ▁the ▁GT - R ▁to ▁be ▁all - w heel ▁drive ▁if ▁necessary . ▁The ▁comb ust ion ▁engine ▁outputs ▁approximately ▁ ▁while ▁the ▁fly w heel ▁system ▁is ▁intended ▁to ▁have ▁an ▁additional ▁output ▁of ▁approximately ▁. ▁The ▁company ▁sought ▁engine ers ▁from ▁its ▁performance ▁division ▁N ismo ▁for ▁their ▁knowledge ▁on ▁the ▁engine ' s ▁development , ▁but ▁had ▁problems ▁installing