Thor Forums

[Chance]

Originally Posted by dstankov

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I will say, however, if I had the 305HP V2 instead of the 362HP V3 things would more than likely be different. I believe the 305 would have resulted in 2250 - 2500 RPM to run between 62 and 65 MPH and fuel consumption would have been greater.

Overall this was a more pleasurable drive than my Class C on the E450 chassis.

No doubt the 3-valve design allows the engine to breath better, particularly at higher RPMs. Ford specs show the 3-valve engine makes almost 20% more power in range of 4,000+ RPMs, but only about 10% more torque in the +/- 3,000 RPM range. My educated guess is that around 2,000 RPMs the difference in torque and power is even less.

In normal driving at around 2,200 RPMs in 5th, and +/- 3,100 RPMs after one downshift to 4th (comparing to Axis), the difference in torque and power between the two engines is limited to no more than about 10% or so.

The biggest difference by comparison is that large gasoline Class As can weigh 50% more than compact Class As like an Axis. That's why I'm hopeful that there is a little room to improve fuel economy slightly.