Turbodiesels can be designed to have a more acceptable spread of torque over their speed range or, if being built for commercial use, can be designed to improve torque output at a given speed depending on the exact use. Naturally aspirated Diesels, almost without exception, have a lower power output than a petrol engine of the same capacity whilst the same time requiring stronger (and thus heavier) internal components such as the pistons and crankshaft to withstand the greater stresses of the Diesel engine's much higher compression ratio.
Turbodiesels can be engineered to have a more balanced distribution of torque across their speed spectrum or, if intended for commercial use, can be designed to enhance torque output at a specific speed based on the precise application. Naturally aspirated Diesels, almost invariably, possess lower power output compared to a petrol engine of identical capacity while necessitating stronger (and thus heavier) internal components such as pistons and crankshafts to withstand the greater stresses of the Diesel engine's significantly higher compression ratio.