One of several teaser images Toyota has released ahead of the FT-Bh concepts global debut at Geneva in March

One of several teaser images Toyota has released ahead of the FT-Bh concept's global debut at Geneva in March

A concept car said to break new boundaries in small car efficiency at an affordable price – probably the claim of many a manufacturer at the upcoming Geneva show - but Toyota claims its FT-Bh is as spacious as an average five-door compact car yet will use half the fuel and produce half the emissions.

FT-Bh stands for 'Future Toyota B-segment hybrid' and engineers focused on five key areas to achieve maximum fuel economy and minimum emissions: weight reduction, optimum aerodynamics, powertrain efficiency, thermal energy management and electricity saving.

This has resulted in a car that weighs under 800kg - at least one third less than most compact cars - with a downsized full hybrid powertrain and a 30% gain in aerodynamic efficiency.

This has also been achieved by adopting an economically viable production framework using common materials and procedures - no exotic materials or expensive techniques, Toyota said.

The automaker will also display the NS4, a next-generation plug-in hybrid, and the FCV-R, the next step towards mass production of hydrogen-powered cars.