This meant that while the RENESIS is rated by Mazda at just 1.3-liter, it produces considerable power. This contributed to less parasitic friction, thus allowing for more power to be squeezed without burning as much fuel. Secondly, Mazda developed a different way to seal the rotors featuring low-height apex seals. This reduced overlap, thus increasing the engine’s effective compression ratio, and improving output and efficiency. However, to combat that, Mazda first redesigned the housing ports. Being naturally aspirated, it didn’t produce comparable power or torque to its predecessor. One big thing that people quite liked about the RENESIS is its efficiency. In fact, the RENESIS even received multiple awards for its innovative design and surprising efficiency. The 13B-MSP (multi-side ports), colloquially referred to as the RENESIS, was introduced alongside the production RX8 back in 2003. The RX8 is a bit of a black sheep in the rotary family, and there are reasons for it. If one wanted an affordable, easy-to-find entry into the rotary world, you only have one option – look up your classifieds and find an RX8 for sale. ![]() This, understandably, has driven the prices of classic rotary Mazdas way up. Anyone who wanted the rotary experience had to buy a Mazda. Thus, it’s fair to say that if Mazda hadn’t adopted the rotary engine, it wouldn’t have garnered as big a fanbase. And if it wasn’t for the rotary engine, Mazda wouldn’t have built their Le Mans legacy in the form of the stupendous 787B. The rotary engine also contributed to the cool factor of the exceptional Mazda Cosmo. It’s also an engine that responds very well to forced induction, much to the joy of RX7 enthusiasts. Of course, there’s also the huge aftermarket available for the 13B, the most beloved of the rotaries. It’s also immensely efficient at producing horsepower for its modest displacement. People love the rotary engine for its naturally enthusiast-centric demeanor. ![]() Granted, only Mazda believed it, as it’s the only surviving manufacturer to develop and apply contemporary rotary engine designs. In fact, to this date, it has been the only other commercially plausible engine type. It was thought up as an alternative to the reciprocating piston engine. Ever since its initial inception, Mazda’s rotary engines (like an RX8 engine) have been a fan favorite.
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