The concept of the A330/A340 Family is unique - a single basic airframe in several versions with two or four engines to achieve the optimum balance of the operating variables of size, range and economics for the airline. The twin-engine A330 models are optimised for high revenue and lowest operating cost on regional to extended ranges, while the four-engine configuration of the A340s offers the needed versatility and the lowest operating cost for the ever-stretching long-range requirement with freedom from ETOPS constraints.

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