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  Toyota has adapted its Hybrid Synergy Drive technology to the Prius c platform.

Toyota hopes the Prius C will claim the best city fuel economy of any car without a plug.

Toyota Australia's Matthew Callachor said the fuel-economy rating for Prius C on the city cycle will be even better than the third-generation Prius.

"In the city where Prius c is more than likely to spend most of its life we expect it to be rated at 3.7 litres/100km," he said. "This compares with 3.9 litres/100km for the regular Prius.

Mr Callachor said Prius c due in local showrooms within three months will be the gateway to an expanding Prius family that will build on the strength of the world's premier eco-vehicle brand.

Prius c will be smaller and lighter than Prius, offering engaging driving dynamics with superior urban manoeuvrability from its hybrid powertrain.

Toyota has adapted its Hybrid Synergy Drive technology to the Prius c platform, redesigning the system's major components to make them smaller, reduce weight and improve efficiency.

Smart packaging resulted in key drivetrain components being located within the chassis to produce optimum interior space and handling. Placement of the compact 1.5-litre Atkinson Cycle petrol engine, transaxle and power-control unit is designed to enhance weight distribution and lower the centre of gravity.

The hybrid battery and fuel tank are positioned together beneath the rear seat, ideally distributing their mass within the wheelbase to improve weight distribution and roominess.

Maximum power from the petrol-electric hybrid system is expected to be 74kW. Standard safety features in Australia will include seven airbags, vehicle stability control, traction control, anti-skid brakes with brake assist, hill-start assist control and front seatbelt force limiters.