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:

    Vehicle Overview
    Redesigned for 2011, the sixth-generation 5 Series offers a longer wheelbase, better fuel efficiency and more conventional styling than its predecessor. Available in 528i, 535i and 550i trims, the ...

    Performance
    The 650i is the only 6 Series trim available for 2012; the convertible is hitting the market ahead of the hardtop coupe. The rear wheels are powered by a 400-horsepower, twin-turbo 4.4-liter V-8 e ...

    Fuel quality
    Fuels that are marked on the gas pump as containing metal must not be used. Refuel only with unleaded gasoline without metallic additives. Do not refuel with any leaded gasoline or gasoline with ...