Electrically assisted turbocharger

BorgWarner tested the idea in the 1990s, but never produced a part for production vehicles because of high power consumption, until the Mercedes-Benz M256 engine (2017), which used a 48-volt electrical system.

The 1.9 kWh battery generates 11 kW of electrical power, and is situated directly between the turbine wheel and the engine's compressor.

The electric motor working with the transmission allows the turbocharger to spool up almost instantly, and boost pressure builds within a very short time while simultaneously reducing turbo lag.

Torque, while not instant like in fully electric vehicles, is produced at a much lower RPM in comparison to the 911's gas powered models.

Moreover, the eight-speed PDK (see dual-clutch transmission) used was re-engineered to accommodate for the significant increase in torque due to the electric motor.