Unlike most hybrids, the concept can be driven by the petrol engine alone, the electric motor alone, or a combination of the two.

Toyota has unveiled the new Auris HSD (Hybrid Synergy Drive) Full Hybrid Concept at the Frankfurt Motor Show.

Power comes from a 97 bhp 1.8-liter four-cylinder engine and a small electric motor which is connected to a Nickel-metal hydride battery (basically, it's a fancy Prius). Unlike most hybrids, the concept can be driven by the petrol engine alone, the electric motor alone, or a combination of the two. Thanks to this unique setup, the car can travel on electric power alone for up to 1.25 miles (2km) at speeds up to 31 mph.

While details are scarce, the hybrid is expected to accelerate from 0-62 mph in about 10 seconds. Fuel economy is said to be "class-leading" in the combined cycle, and CO2 emissions are expected to be below 100 g/km.

The production Auris HSD hybrid will be built at Toyota's Burnaston, UK factory in mid-2010.

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