I agree with you on the very low end torque advantage of the diesel.
In regards to more low end HP. Let's talk about that.
5.7L gasser - 383 HP @5600, 403 TQ @3600
4.5L TT diesel - 268 HP @3600 480 TQ @1600-2800 (without USDM emissions)
It would be nice to overlay dynos. Short of that, translating the 5.7L 403tq@3600 (403*3600/5252) = 276HP @ 3600. Even at 3600rpm, the 5.7L already makes more HP than the 4.5L diesel can ever muster. The 5.7L then runs away with additional rpm headroom to continue to pile on its 115hp advantage.
You're just stating the obvious here. At its peak torque RPM, the 5.7l makes more HP than does the 4.5l v8...this shouldn't be a surprise to anyone.
At low RPM's (which is relevant for towing and offroading), the 4.5l thrives, whereas the 5.7l needs to rev higher to provide comparable grunt. A torque curve would help illustrate that...but also if you'd spent any time actually driving the two, you would realize what I'm talking about.
Gasoline v8's need rev's and added cooling for the slow-speed, high work-load stuff that trucks tend to get used for. They work well for those applications, but diesels are inherently better suited for that sort of stuff. My take, which is just as subjective as your take on this topic.
The 5.7L under 3600 is ultra smooth and ultra quiet. The 4.5L diesel is not as much, because of inherent diesel traits. Trade low rpm tractability for more NVH?
I think you're being overly generous by saying that the 5.7l is smooth and quiet under 3.6k RPM's. But I do concede (as I already have in previous posts) that the 5.7l is smoother and quieter as compared to the 4.5l diesel v8 at lower RPM's. HOwever, you will need to rev the 5.7l to the higher RPM's to get usable grunt for high work-load applications, which negates much of the NVH advantage....to the point where I honestly feel a lot more comfortable driving a diesel down rugged and lonely roads rather than a gasoline. You just don't need to work them as hard as gassers to get over obstacles and haul a payload. Again, if you'd have spent any time actually driving a modern diesel in offroad scenarios, you'd see what I'm getting at. Showing a youtube video hardly proves anything.
Diesel convenience is a thing. I'm on the towing boards and there's tons of threads that praise diesel models yes. There's also ones that talk about the inconvenience of diesel availability and fueling with the single pump on the end, during holidays for example.. Or waiting for contractors to fuel and get their refreshments, while one's trailer is sticking out of the road. One could use commercial truck fueling stations, yet that's not my idea of comfort and convenience to be mixing it up with that crowd. It's a minutia significant enough that there's people switching away from diesels and their other disadvantages, for modern gassers.
You're making a mountain out of a mole-hill. Diesel is widely available in North America because a lot of industries and self-employed workers rely upon it. There are usually less diesel pumps versus gasoline pumps at the average fuel station, but then again there are far more people driving gasoline vehicles versus diesel ones. If you're worried about waiting in a line at a fuel station on a busy holiday, then you should sell your vehicle and avoid driving all together...because many fuel stations will have lines on busy weekends, irrespective of which fuel type you're using.
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