Like, you see cars like ferrari making absurd power figures with small block engines, like a 4 liter making 800hp. Is it just a cost thing that they would rather use a 10 liter? It makes the same power, and thanks to the transmission it’ll get the same torque at the wheel.
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Another important component is high torque diesel and fuel economy. Nearly all large towing capacity tractor trailers use high displacement inline six cylinder diesel engines. Many engines exceeding 1500 lb/ft of torque. A comparable gas engine (longevity concerns aside) would have vastly worse fuel economy. And when you run an industry like trucking where fuel prices affect your profit margins, you can rest assured that engineering teams design the engines that go into these trucks help to maximize industry profits.
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