BTW a good read, although simplistic is available here;
https://blog.caranddriver.com/horsepowe ... ifference/https://auto.howstuffworks.com/auto-par ... verter.htm"Modern torque converters can multiply the torque of the engine by two to three times. This effect only happens when the engine is turning much faster than the transmission.
At higher speeds, the transmission catches up to the engine, eventually moving at almost the same speed. Ideally, though, the transmission would move at exactly the same speed as the engine, because this difference in speed wastes power. This is part of the reason why cars with automatic transmissions get worse gas mileage than cars with manual transmissions."
https://auto.howstuffworks.com/auto-par ... torque.htm"Let's look at the differences between two truck engines. A Dodge Ram truck with a 6.7-liter Cummins Turbo Diesel engine has 350 horsepower and 650 pounds-feet of torque. The same truck with a 5.7-liter Hemi gasoline V8 engine, on the other hand, has 383 horsepower and 400 pounds-feet of torque. See the difference? While the gasoline engine has a little more power, the diesel's torque completely blows it away [source: Dodge]."
"While the two trucks have very similar towing capacities --15,650 pounds (7098.7 kg) for the gasoline engine and 16,350 pounds (7416.2 kg) for the diesel -- all that low-end power means the diesel engine will have an easier time towing things. Keep in mind that the diesel Dodge engine gets that much torque at only 1,500 rpm, which is just above idle. With a diesel engine, you won't have to rev up to start towing because the power already exists."
The Caterpillar D7 had both naturally and turbo-charged aspirated diesel engines with a displacement of 831 cubic inches or 13.6 liters. It had four cylinders, a bore by stroke of 5 3/4-by-8 inches and a compression ratio of 15.7 to 1. It used a liquid cooling system with a coolant capacity of 72 quarts. It used an oil bath air cleaner, had an oil capacity of 22 quarts and employed a two-cylinder pony engine starter type.
Performance Specs
The Caterpillar D7 bulldozer was able to generate a maximum output of 89.10 hp at 1,200 rpm. It had a maximum belt fuel use of 6 gallons per hour and a maximum drawbar power of 78.48 hp. In addition, it could generate a maximum drawbar pull of 21,351 lbs.
How does the Caterpillar tractors do this? It's all about torque!
This may explain what has been discussed here!
Cheers Gipsy
although I'm sure somebody will challenge that
even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's