Toyota has just lifted the wraps of their new FT-Bh concept at Geneva, a vehicle designed to take the efficiency of full hybrid vehicles to new heights.

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The FT-Bh is an ultra-light concept, weighing less than 800kg, which demonstrates what can be achieved in terms of fuel consumption and CO2 emissions in an affordable family supermini.

In Toyota's mission to achieve the best possible fuel economy and emissions, the design team focused on five key areas: reducing weight, driving resistance (including aerodynamic and tire performance), powertrain efficiency, thermal energy management and electricity savings.

The target for FT-Bh was a 25 per cent saving on the 1.0-liter Yaris’s 1,030kg kerb weight. Using a combination of high-tensile steel, aluminium and magnesium in the construction has trimmed the weight to just 786kg. The FT-Bh measures 3985mm long, 1695mm wide and 1400mm tall with a 2,570mm wheelbase.

FT-Bh’s new full hybrid drive system is a Toyota's latest effort in powertrain downsizing. With substantial weight savings in every driveline component, it is almost 90kg lighter than the Hybrid Synergy Drivesystem used in today’s Prius.

Thanks to its low weight, aerodynamics, very low driving resistance and its highly efficient powertrain, FT-Bh can achieve an average of 57.2 km/l (134.5mpg) fuel consumption and 49g/km CO2 emissions.