Nonsense. Show me even one example. Here are few to the contrary including the famous Ford IH 7.3 diesel when it was a gasoline engine. Long stroke makes torque as does a lot of turbo-boost. Gas or diesel.
7.3 diesel in Ford trucks was made from the IH MV446 gas engine.
Ford-IH 7.3 diesel (445 cubic inches), no turbo: 185 HP @ 3000 RPM, 360 lbs. max TQ @ 1400 RPM. 4.1" and stroke 4.18"
IH gasoline 7.3 (446 cubic inches), no turbo, 235 net hp at 3600 rpm, 8:1 compression ... 385 lbs. max torque at 2600 RPM, 4.125" bore x 4.18-"stroke
Oldsmobile 5.7 (350) diesel - 120 HP @ 3600 RPM and 222 TQ @ 1900 RPM Oldsmobile 5.7 (350) gas engine - 170 HP@3800 and 275 ft/lbs of torque @ 2000. Both 4” bore X 3.38” stroke
Tractor engines with equal sizes in gas and diesel (same bore and stroke):
Here are a few examples of tractor engines with equal sized power ratings in gas and diesel with different sized engines - and also two equal sized in gas and diesel:
Deere 2010 (and 1010 with diesel version) Note that both 145 engines are equal bore and stroke, and the gas has more torque)
145 gas: 39 horse, 114 lbs. torque @ 1500 RPM 145 diesel: 36 horse, 95 lbs. torque @ 1500 RPM 165 diesel: 46 horse, 119 lbs. torque @ 1500 RPM Those are specs published by Waukesha. The gas 426 runs 6.2 to 1 compressoin ratio. Diesel runs 17.5 to 1. Horsepower is stated as "rated horsepower" and torque as "maxium torque - RPM." So the 426 diesel runs a max torque of 259 lb. ft. at 1600 RPM. Gas 426 264 lb. ft. @ 1200 RPM
Mack had a pile of long-stroke gas engines.
707 cubic inch gasoline Mack had 5" bore by 6" stroke. 232 horse @ 2100 RPM and 617 lbs. of torque @ 1200 RPM.
707 cubic inch diesel Mach had 5" bore by 6" stroke. 201 horse @ 2100 RPM and 602 lbs. of torque @ 1500 RPM.
Mack's "little” 464 in gas and diesel:
464 gas engine, 464,cubic inches, 4 7/16" bore by 5" stroke, 185 horse @ 2800 RPM and 380 lbs. torque @ 1400 RPM
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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