The fuel efficient Japanese automaker Toyota has created the Sai luxury hybrid sedan which cart model is based upon Lexus HS 250h. The new four door Hybrid Synergy Drive sedan is both bigger and more luxurious than the automobile manufacturer’s current flagship hybrid, the Toyota Prius. In this power comes from the 2.4-litre hybrid system. This sees the 2.4 litre VVT-i 4 cylinder engine, with 150bhp team up with an electric motor and reduction gear, with nickel-metal hydride battery pack mounted beneath the boot floor. Combined power is rated at 187bhp.