Quote:
Originally Posted by Grape Ape
The V8 will have - a heavier block (might be on part with a 3.8 straight six)
- a greater total piston circumference (more friction)
- two extra rod journals and one extra main journal on its crank (more friction and weight)
- longer cam(s) with four (or eight) extra lifters and maybe rocker arms(more friction and weight)
- a bigger oil pump to keep all this lubed (greater parasitic loss)
- and probably a bigger water pump to serve the bigger, more complex cooling jacket(greater parasitic loss).
And there is a fair chance that the V6 will have greater total valve area which would reduce pumping losses relative to the 3.8 V8.
Fuel efficiency aside, a V6 will always be cheaper to build (and buy) than a V8 with the same tech (GDI, DOHC, Turbos, etc). |
That last part needed bolding. To make the V6 as good of a buy, there needs to be a lot more tech put into it to make it worthwhile. So that "tech" is inherently going to make a smaller engine more expensive.