Twin-scroll turbocharging

BMW 3 Series / Overview / Twin-scroll turbocharging

The new four-cylinder engines also feature twin-scroll turbocharging. This means that the exhaust stream from cylinders 1 and 4, and the exhaust stream from cylinders 2 and 3, follow separate spiral-shaped paths to the turbine wheel. This reduces exhaust back-pressure at low engine rpm, allowing the energy of the exhaust gas pulses to be utilised as efficiently as possible. The result is instant throttle response and fast-revving performance which BMW drivers can instantly translate into driving pleasure.

    See also:

    Dimensions
    Coupe All dimensions given in inches/mm. Smallest turning circle dia.: 35.1 ft/10.7 m 135i: height 55.4 in/1,408 mm Convertible All dimensions given in inches/mm. Smallest turning circle dia.: 35 ...

    Snow chains
    Fine-link snow chains Only certain types of fine-link snow chains have been tested by the manufacturer of your vehicle, classified as road-safe and recommended. Consult your service center for m ...

    2012 BMW 3 Series: Up Close
    Of all BMW's cars, the 3 Series is the one that somehow escaped being hit by the Chris Bangle ugly stick, so I didn't go to the redesigned compact sedan's North American debut looking for sweet re ...