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Engine |
MINIs are powered by variations on the four-cylinder, 1.6-liter "Pentagon" basic engine, which was developed jointly by BMW and Chrysler.
The MINI Cooper delivers 85 kW/115 bhp (PS),
while MINI One has 66 kW/90 bhp (PS). The Pentagon engine meets the EU4 emissions requirements and is one of the few engines on the market that requires no secondary air injection or exhaust re-circulation to achieve this.
The engine has an overhead camshaft with control chain and four valves per cylinder, with roller tip levers that control hydraulic valve balancing elements. The cast iron engine block ensures low levels of noise and vibration. The cylinder head is aluminum.
Active knock control means that the engine runs on lead-free fuel between 91 and 98 octane. The same engine tuning can therefore be used almost anywhere in the world, no matter what fuel grade is available locally. In addition, customers can choose freely if various fuel qualities are available in their market.
The engine is managed by a Siemens control unit (EMS 2000) called the "Powertrain Controller". This also controls the continuously variable transmission that is offered as an optional extra.
MINI features throttle-by-wire electronic technology, which replaces the direct mechanical link between the accelerator and the engine. When the driver presses the accelerator, the action is transmitted to the Powertrain Controller, which then determines the ideal amount of fuel to supply to the engine. With more powerful acceleration, the system can determine the best fuel feed for maximum performance and minimum emissions.
The most important task for the Powertrain Controller is monitoring the engine torque, optimizing torque values and guaranteeing an even fuel take-up. If the required torque is below the maximum value available, it is possible for the Powertrain Controller to retard the ignition timing and create a torque reserve. The driver experiences this as rapid pick-up and improved driving characteristics, especially at low speeds.
The MINI has a service level indicator. This determines the best time for the car to be serviced, taking into account the manner in which it is being driven. The first service will be between 10,000 and 12,500 miles (16.000-20.000 km). After this, the interval is every 15,000 to 20,000 miles (30.000 km). The MINI's running costs are thus kept to a minimum.
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