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For the model year 2010, the BMW 135i Coupe and Cabriolet will be updated with the new N55 single turbo engine. It loses one turbo (though the specs sheet indicates similar performance with power and torque) but gains a transmission gear – the 6-speed auto has been replaced by the non-M version of the 7-speed DCT twin clutch transmission that found its way into the 335i earlier.
With these changes, the combined fuel consumption figure for the Coupe drops to 8.5 liters per 100km which BMW says is nearly 1 liter less than the model equipped with the twin turbo engine and the regular automatic gearbox.











