The side profile of the new BMW 1 Series is pure racing car. The elongated doors and frameless windows maximise the car’s sporting appeal while the passenger compartment is set far back, drawing the eye immediately to the rear axle. The car’s more dramatic side skirts further underline its dynamism, inviting you to open the door and take a seat.
Every movement requires energy, this is why Electric Power Steering only acts when it is needed. To give you more bends per litre, an electric motor is used to assist the steering. However, unlike conventional hydraulic systems, Electric Power Steering is supported by an electric motor which helps to ensure that energy is only used during actual steering manoeuvres. If the steering wheel is kept in a constant position when driving straight ahead or cornering, the electric motor is inactive and therefore does not use any energy.
With Brake Energy Regeneration, BMW EfficientDynamics points the way to a more energy-efficient future. As soon as you brake or take your foot off the accelerator, the kinetic energy is captured and fed to the battery. This reduces the amount of power the battery takes from the engine and hence lowers fuel consumption. When the driver presses the accelerator, on the other hand, the alternator is decoupled from the drivetrain. With fewer components drawing power from the drivetrain, more of the engine's output can go into accelerating the car.
The Auto Start Stop function automatically switches off the engine when the car is at a standstill and in neutral, then restarts it as soon as the driver presses the clutch pedal again. Fitted for example to all BMW 1 and 3 Series models with a four-cylinder engine and manual transmission, the Auto Start Stop function helps reduce both fuel consumption and emissions.
The perfect synthesis of power, fuel efficiency and smoothness: the straight six-cylinder diesel engine with Variable Twin Turbo delivers lag-free acceleration and pulls strongly all the way up to 5,000 rpm. Experience it in the BMW 335d Coupé, for instance, and discover just how athletically and efficiently it performs on the road. A true star among diesels.
Athleticism and efficiency go hand in hand - as our new six-cylinder petrol engine proves. Thanks to High Precision Injection, it gets the most out of every drop of fuel. HPI sends a cloud of precisely blended fuel/air mixture to the spark plug, where it is surrounded by colder air. Combined with the benefits of twin turbo technology, it makes for greater refinement, better performance and lower fuel consumption. By using two small turbochargers instead of a single large one, the twin turbo system ensures boost is available right across the rev range.
The new four-cylinder diesel engines are a perfect example of how BMW EfficientDynamics can help continually improve engine performance. The engine block is made of aluminium and offers optimised combustion chamber geometry while the third-generation common rail fuel injection system introduces the diesel into the combustion chamber at remarkably high pressure - up to 1,600 bar - and with outstanding precision, using state-of-the-art piezo injection technology. The sum of these technologies is what makes the notable difference: significantly reduced CO2 emissions of 119 g/km (for the BMW 118d with manual transmission) to 145 g/km (for the BMW 120d with automatic transmission) yet higher performance levels. Both engines are fitted with a diesel particle filter as standard and comply with EU4 emissions regulations.
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