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.

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    Ventilation in rear, center
    ▷ Thumbwheels for adjusting the temperature, arrows 1. Toward blue: colder. Toward red: warmer. ▷ Lever for changing the air flow direction, arrow 2. ▷ Thumbwheels for open ...

    Vehicle equipment
    All standard, country-specific and optional equipment that is offered in the model series is described in this chapter. Therefore, equipment is also described that is not available in a vehicle, ...

    Dimensions
    Width, height 1 Vehicle height: 66 inches/1,675 mm 2 Vehicle width without mirrors: 74 inches/1,881 mm 3 Vehicle width with mirrors: 82.6 inches/ 2,098 mm Length, wheel base 1 Wheel base: 110 ...