The RX-Z was developed as Ciprian puts it; "as a link between fossil fuel cars and more ecological ones." To achieve this the proposed drivetrain for the concept includes a 3.0 litre V6 diesel engine up front - which replaces the notoriously thirsty rotary engine from the RX-8. And a pair of electric motors at the rear. Under normal conditions the RX-Z would be driven solely by the diesel engine. But at low speeds around town the electric drive can be used on its own for emission free motoring. At higher speeds the electric motors work in conjunction with the V6 engine to provide a boost function. A start/stop technology which is integrated into the engine further increases fuel efficiency.
Like the RX-8 the RX-Z concept is equipped with four doors. The rear doors are half-sized and hinged at the rear. This helps to disguise them into the bodywork and reduce their impact on the flowing lines of the car.
One of the more unusual features of the Mazda RX-Z concept is the rear light panel. In the middle is a display screen which can light up with any text written by the driver. Presumably you can only 'write' on the back of your car when stopped, otherwise this would be one surefire way of either getting in a crash or getting in trouble!
Mazda RX-Z concept