Mazda working on new rotary engine for RX-8 heir

Mazda is working on a new rotary engine for the RX-7 descendant that can run on either petrol or diesel, and offer improved fuel economy compared to the recently terminated RX-8 coupe.

The two-stroke 16X engine is designed to correct the shortcomings of Mazda�s most recent rotary engine, including its high oil consumption and lack of torque in the mid-range. Sources in Japan say the new unit has achieved considerable improvements in fuel efficiency.

But the final go-ahead has not yet been received from Mazda�s top executives. Mazda is still working out how to attain the best mixture of performance, economy and emissions. In its current situation, the 16X is expected to give the RX-7 about 300bhp and enable it to reach 60mph in less than 5 seconds.

Mazda�s R&D department has invited several external drivers and racers to test RX-7 mules, and the design team has required feedback at customer clinics.

Much of the push towards another rotary-engined sports car comes from Mazda USA. A recent autonomous survey revealed that demand for an affordable rotary-powered sports car is still as strong as it�s ever been in the U.S. It�s been suggested that were it not for American demand for the car, the project would have been abandoned.