These are the first spy pictures of a hybrid BMW 1-series prototype undergoing testing.
The car's powertrain is only identifiable by the 'Hybrid Test Vehicle' stickers that adorn the rear windows and rear bumper.
See the hybrid BMW 1-series spy pictures
The hybrid arrangement is believed to be a scaled down version of the one already available on the 7-series and X6, which has the motor sandwiched between the engine and transmission, with a compact lithium ion battery in the rear.
The hybrid 1-series is tipped for production when the next generation 1-series is launched in late 2011 or early 2012, and will fight for sales with the production version of the Lexus LF-Ch concept car, which was shown at the Frankfurt motor show earlier this year.
Twitter - follow autocar.co.ukSee all the latest BMW reviews, news and video
