4.7 V8 vs. 5.7 V8
Someone mentioned in another sttring below that Toyota rates gas mileage for both of these engines about the same. That's true. In fact, some figures show the 5.7 to actually get a mile-per-gallon better than the 4.7. Go figure.
With that being the case, why offer the 4.7? Is it purely a cost issue (cheaper to manufacture and therefore cheaper for the customer to buy)? Or could it be that Toyota feels that its 4.7 is a proven and reliable engine and wants to keep it in the line-up.
I cannot see where the 5-speed vs. 6-speed tranny would factor into it. All things being equal, who wouldn't want a 6 speed? Nor do I see an issue with the bigger ring gear being fitted for 5.7 models. If gas mileage is just as good or better, why not have that monstrous rear end gear?
I'm sure the 5.7 has been tested thoroughly, but we won't know the real verdict on that engine until about a year into production.
|