If you would like to get beneath the surface here is an excellent paper from Nissan. How the KR15DDT Variable Compression engine works and much much more.
Shows that Nissan have probably matched the technical excellence of Toyota even if that may not yet have fully translated into deliverable product.
https://www.nissan-global.com/EN/TECHNI ... 89/#page=1
Its a heavy read on-line and best downloaded as a PDF.
