Workhorse to Re-enter Class A Chassis Market

427435 wrote:

hipower wrote:
I've always favored the big block GM engines for the way they develop their power at a lower RPM than the Ford V-10. I've had several of each in motorhomes and our fleet trucks and just don't like the higher RPM in over the road uses. Might be just me, but it's my story and I'll stick with it.

As a current owner of a rear engine diesel coach I could be interested in a gas powered, rear engine coach with air ride suspension and true air brakes. Unfortunately the reality of that thinking is that the cost differential in purchase price would be relatively small since the only real difference would be the manufacturers cost for the engine all else being fairly equal.

Unfortunately, that's not really true.

6.8-liter V-10 engine is rated at 362 horsepower at 4,750 rpm and 457 foot-pounds of torque at 3,250 rpm.


8.1-liter V-8 produces 340 horsepower at 4,200 rpm and 455 foot-pounds of torque at 3,200 rpm.


At 4200 rpm, the V10 is also producing the same hp as the 8.1 (340 hp).

Page 5 of this link has a hp and torque curve of the two engines overlaid on each other (it won't let me copy/past the chart).

http://www.newyorkbussales.com/ford-engine.cfm




People forget that a V10 at 4000 rpm sounds like a V8 at 5000 rpm (25% more cylinders firing).

I agree with your post, I had a 8.1 and now a 6.8 V-10 and see very little difference in RPM in the hills and my new motorhome weights 6000 lbs more