The Peugeot RD and Roa are Iranian made cars (by Iran Khodro Co). The car is a combination of Paykan and Peugeot 405. The body of Roa is a copy from Peugeot 405 and its engine and chassis are developed and modified from Iran Khodro's Paykan's chassis. Contrary to all other Peugeot 405 versions, the Roa is a rear-wheel drive car.
Technically wise, The engine is the Rootes 1.6 Hillman Avenger (which were used on Paykans since late 70s) and was mated to the Hunter drivetrain and suspension.
A revised model released in 2010 known as Peugeot Roa uses 1,700 cc CNG engine. In older models, Iran Khodro used a modified version of the Paykan's 1.6-litre engine.
The engine specifications are as follows: