Our spies have already caught the 2015 Mazda MX-5 on multiple occasions but new details are starting to emerge about the upcoming roadster.

Our spies have already caught the 2015 Mazda MX-5 on multiple occasions but new details are starting to emerge about the upcoming roadster.

In a recent interview with Auto Motor und Sport, Mazda's Kiyoshi Fujiwara revealed the next-generation MX-5 will be significantly lighter than its predecessor. Fujiwara declined to go into specifics but the magazine says the car will weigh approximately one tonne (2204 lbs). This will be achieved by utilizing a new lightweight structure which should give the model a better power-to-weight ratio.

In related news, Mazda is hard at work developing the next-generation of Skyactiv engines. Engineers are reportedly trying to make them more efficient than hybrid engines so they could adopt a homogeneous charge compression ignition system which could improve fuel efficiency by up to 30 percent. If everything pans out, the new engines could be introduced in 2018.

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