This is the next generation BMW 1 Series, which was caught testing by our spy photographers.

The new BMW 1 Series is expected to go on sale in 2011, with the five-door hatch the first model on sale. It will be followed by a three-door, coupe and convertible, while performance M versions and a mini-MPV derivative have also been mooted.

Although the car ran in the much used, swirl-based disguise employed by BMW, it is possible to make out many of the new BWM 1 Series’ new lines.

The design doesn’t appear to have deviated dramatically from the current model, although standout features include a redesigned front end, with the bigger and more upright kidney grilles taking styling cues from the BMW 5 Series GT.

The spy photographer also reported that the test mule is wider and longer than the current car, with reports suggesting that particular attention has been paid to opening up the rear passenger space, which has been criticised on the current model.

There’s no news on what engines will form the line-up, although rumours suggest a series of turbocharged units ranging in size from 1.4-3.0 litres will be used.

The smaller four-cylinder units are likely to be the engines co-developed by BMW and PSA Peugeot Citroen, and already used in the Mini Cooper to improve economy without sacrificing performance.

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