Retro-futurism is a popular design theme for automakers these days. Modern reincarnations of popular classics with heavy touches of retro range from small cars like the MINI and the Fiat 500 to muscle cars like the Dodge Challenger and Chevrolet Camaro.

It looks like Nissan wants in on the game too, and they’ve showcased these Nissan IDx Freeflow and Nissan IDx Nismo concept car duo at the 2013 Tokyo Motor Show.

The IDx duo look like a modern interpretation of the old Datsun Bluebird 510, which competed in races like the Trans Am Series and the Australian Rally Championship in the ’70s and ’80s. It’s about 4.1 metres in length, 1.7 metres in width and 1.3 metres in height. The Nismo version is wider at 1.8 metres.

Although it’s just a design concept for now, Nissan proposes for the car to use the company’s 1.6 litre turbocharged engine, mated to a CVT gearbox with a six-speed manual shift mode for the Nismo car and a less powerful engine of between 1.2 litre to 1.5 litre in size mated to a CVT gearbox for the Freeflow.

Nissan IDx Freeflow Concept

Nissan IDx Nismo Concept