As mentioned, the new car will adopt a similar design language to the new BMW 5 Series, with its pronounced front grille and fascia and sharper bonnet bulge.
The overall dimensions of the new model will be bigger than that of the current 1 Series, with more interior room and boot space expected as a result. Track and wheelbase dimensions will also be larger than the current model.
All models will remain rear-drive and use BMW's expandable F20 modular platform, so three- and five-door models will be made without incurring more development costs.
As for engines, the next generation BMW 1 Series will receive a downsize in a number of trim levels, with the chance of a PSA-developed 1.2-litre and 1.5-litre making its way into the entry-level models.
A six-cylinder engine is likely, however, the new TwinPower 2.0-litre engine is also likely to be designated for the top-spec models.
BMW will be focusing on keeping that all-important fuel consumption rating down and will introduce a number of EfficientDynamics technologies with the new lineup; including Stop/Start, solar power and regenerative heat recovery systems.
The 2012 BMW 1 Series is set to be unveiled at the Frankfurt Motor Show in September later this year, and then go on sale towards the end of 2011/beginning of 2012.