Exhaust-gas turbocharging makes it possible to increase maximum torque and maximum engine power. Turbocharging delivers a greater mass of air into the combustion chamber, so that more fuel can be burned. Compared to naturally aspirated engines, turbocharging leads to higher power output for the same engine displacement and therefore to greater low-end torque.
The speeds that the exhaust-gas turbocharger’s turbine can handle, thanks to excellent materials.
The temperature that the exhaust-gas turbocharger can permanently withstand.