The model, which is described as "a brave statement of intent" from the company, has been designed to "disrupt the premium saloon category." It previews a future range-topping production model which will aim to take on the likes of the Porsche Panamera and Mercedes-Benz S-class.
The four-door fastback also illustrates Infiniti's new design language. Measuring 5060mm long by 2010mm wide, and 1340mm tall, the Q80 Inspiration closely matches the dimensions of its rivals. It sits on 22-inch alloy wheels.
Powering the concept is a new hybrid powertrain that consists of a downsized twin-turbocharged 3.0-litre V6 engine and an electric motor. The V6 is the first of a new family of powerplants which will appear in Infiniti models within the next two years, as the firm plans to double its powertrain range before the end of the decade.
The all-aluminium V6 produces 444bhp and the electric motor, which draws its power from a lithium-ion battery pack, outputs 99bhp. Infiniti says that the total system output is 543bhp and 553lb ft; average economy is reputed to be 51.4mpg and CO2 emissions are claimed to be 129g/km.
Power is channeled through a nine-speed automatic transmission to the rear wheels in normal driving but torque can be split between all four wheels depending on road conditions. Drivers can also opt to place the car into all-wheel drive mode permanently.