The BMW Group and PSA Peugeot Citroen have unveiled new, jointly developed petrol engines.

Beginning in 2006, the two types of engine (1.6 115bhp and 143bhp units) will equip small and mid-size cars produced by the Peugeot and Citroen, as well as future models of the Mini. Production is expected to eventually total roughly one million units a year.

The new models are the first in a series that will eventually comprise engines delivering a range of power outputs from 75hp to 170bhp.

Innovative features include direct injection to optimize power, twin-scroll turbocharger to improve response time and driving comfort and self-disengaging water pump to reduce fuel consumption and emissions.