Rogue One wrote: ↑Thu Sep 13, 2018 7:54 am
Why the revised QR25DE isn't called QR25DE 2.0 or some such is anybody's guess.
One of modern Nissan's awful trends. There have been a lot of engines with the VQ designation that had very little to do with each-other aside from bore-spacing and basic block layout. There's the original FWD VQ30DE, which spawned the FWD VQ35DE that's basically still in use today in the same exact form as 2002. The RWD VQ35DE and VQ40DE were closely-related to the FWD VQs, but with a different block casting with tweaks for more longitudinally-suited dipstick and accessory arrangements (The VG30E used the same block in both arrangements, with either unused dipstick location plugged, for instance). Then there was the VQ35HR, and the VQ37VHR which have about as much in common with the VQ as they do with the VG or the VR. They're so heavily evolved from the original VQ that there's really nothing about them aside from the bore spacing and most basic block layout that's the same.
Back in the 90s, Nissan heavily redesigned the VG30DE to fit in the Maxima's tiny enginebay, and gave it a whole new engine designation (VE30DE). These days, they make far more significant changes to the VQ and just keep calling it the same thing.
The QR has always been a turd, and will always be a turd, though. It's a little more refined today, and has less hunger for oil and fasteners, but it's coarse, sounds AWFUL, and struggles to make usable power despite its displacement and torque output.
I also wonder exactly how much the VR30DDTT has in common with the VR38DETT, and how much it's just marketing wanting to claim certain Infinitis are related to the GT-R.