The N74 features twin turbochargers, which are not present on its naturally aspirated BMW N73 predecessor.
[2] Like its predecessor, the N74 has direct injection, DOHC and variable valve timing (called double-VANOS by BMW).
[1] 2016 saw the introduction of the 6.6 liter N74 V12 variant to the BMW 7-series along with some Technical Updates (TU) for reliability.
The facelifted 2020 models saw power reduced in the EU market to 430kW (577 bhp) due to emission regulations.
US models enjoyed the bump in torque with horsepower remaining close to the previous level at 600 bhp.