The exhaust-driven turbocharger
generally uses a scroll-type compressor and a scroll-type turbine, or turbo, on a common shaft with foil, or air, bearings, and turning at speeds of 30,000-60,000rpm.
While turbocharging is commonly used to boost the power and torque output of diesel engines, Volkwagen (Wolfsburg, Germany) uses an exhaust-driven turbocharger
mainly to provide sufficient excess air for cleaner combustion over the entire engine operating range.
The model is equipped with a six-cylinder engine coupled with a traditional exhaust-driven turbocharger
with a 48-volt electric compressor.
The model is equipped with a 1.4 litre petrol engine coupled with an engine-driven supercharger and an exhaust-driven turbocharger
that delivers around 180bhp coupled with a second-generation seven-speed DSG gearbox.
The transversely mounted, 2.9L, 6-cylinder, double overhead cam, twin exhaust-driven turbochargers
with intercoolers engine gave great balance to the driving experience.
Both firms are allegedly working on a mid-engine configuration equipped with a 4.0-litre V8 engine, of BMW's own design, with two exhaust-driven turbochargers
and another two compressors spun by electric motors.