BMW 128i Convertible

The revolution continues with a top-down version of the 128i. It's a BMW that embraces the wind and tosses everything else conventional back into it, at the speed of 0-60 in 5.4 seconds.

The new straight-six power unit of the BMW 135i Coupe and the BMW 135i Convertible owes its exceptional efficiency to the first-ever combination of BMW TwinPower Turbo Technology, High Precision Injection, and VALVETRONIC valve management.

The turbocharger system following the twin-scroll principle separating the ducts for three cylinders at a time both in the exhaust gas manifold and in the turbocharger, as well as VALVETRONIC developed to an even higher standard of efficiency, contributes accordingly to the extremely spontaneous and direct response of the drivetrain.

This kind of technology allows infinite adjustment of valve stroke and valve timing on the intake valves. Throttle losses in the charge cycle are reduced to a minimum and the energy contained in the fuel is put to maximum use. In conjunction with High Precision Injection likewise optimized to an even higher standard, this offers an unparalleled balance of driving performance and fuel economy never seen before in this class.

The BMW 135i Coupe and the BMW 135i Convertible come as standard with a wide range of BMW EfficientDynamics technologies combined with one another in an appropriate symbiosis for each specific market, including features such as Brake Energy Regeneration, a gearshift point indicator on models with a manual gearbox, a map-controlled oil pump, final drive with optimized warm-up running qualities, as well as on-demand control of the engine's ancillary units such as the pressure-controlled fuel pump.

Both the BMW 135i Coupe and the BMW 135i Convertible come as standard with a newly developed six-speed manual gearbox. Optimized for maximum efficiency, this high-tech gearbox features dry sump lubrication significantly reducing drag forces and completely avoiding splash losses in the interest of even greater efficiency all round.

The seven-speed double-clutch gearbox with Sport Automatic featured for the first time in the BMW 1-Series makes an even greater contribution to the optimisation of driving characteristics in the spirit of BMW EfficientDynamics. The double-clutch gearbox improves both acceleration and the efficiency of these compact top-flight performers, at the same time combining this dual progress with the comfort features of a BMW automatic transmission. The seven-speed double-clutch gearbox shifts gears without the slightest interruption of power and torque and offers the driver the choice of either automatic transmission or a manual gearshift.

Source: BMW press

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