I have not been posting at CCM for sometime but the disagree of WeiKee point of view on putting highly on 3.0l engine (i.e. VQ30DE here) has triggered me to write.
VQ25DD no way match VQ30DE is partially correct...is a difference of slight:
VQ25DD 270 N·m to VQ30DE 294 N·m (difference of 27n-M, 15PS@same rpm)
If is VQ30DD then is sweet 324 N·m (difference of 54n-M, 45PS)
WeiKee also like to use like 'Once you are on 3.0l you shall not want anything else' something like that. I sometime wonder how powerful is it really a VQ30DE...have you tested the 0-100km/h is how many seconds?
I felt is kind of not worth the pay of roadtax...why some engine are tuned, supercharged and etc to escape the paying of tax for no apparent reason. I mean does it mean bigger engine cc car require more space on the road? Why most demanded Accords and Camrys are still below 2.5l range...because not wanting to pay RM2000+ for roadtax. So to speak also for E series 230k 240,280 V6...etc. I even believe 350Z is a waste if is for power...better opt for a RB26DETT or even a RB25DET. The 3.5l is RM4.3k for roadtax...is crazy...crazy in the sense for paying someone who don't know the money is used for what purpose. Ehhh..however if is a VR38DETT then is worth the pay for a 3.8l roadtax...hehe.
I strongly believe if upgrade for a VQ20DE, from most pref to least pref:
1) VQ25DD (smart for power upgrade and lower roadtax)
2) VQ30DD (smart for power and also ok la for roadtax) but is rare to find one
3) VQ30DET/DETT (smart...yummy...and go for it) but rare and complicated I guess
4) VQ30DE (smart for power but not so smart for roadtax)
Just my thoughts...
Ref:
Nissan VQ engine - Wikipedia, the free encyclopedia
VQ25DD
210 PS (207 hp/154 kW) to 215 PS (212 hp/158 kW) @6400 rpm and 195 to 199 ft·lbf (264 to 270 N·m) @4400 rpm
VQ30DE
193 PS (190 hp/142 kW) to 230 PS (227 hp/169 kW) @6400 rpm and 205 to 217 ft·lbf (278 to 294 N·m) @4400 rpm.
VQ30DD
230 PS (227 hp/169 kW) to 260 PS (256 hp/191 kW) @6400 rpm and 217 to 239 ft·lbf (294 to 324 N·m) @3600 rpm.