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| This engine featured a layout where the conventional peripheral exhaust port was modified to the side exhaust port, producing higher performance, improved fuel economy, and low emissions. |
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| Storage location | : | - | |
| Year manufactured | : | 2003 | |
| Manufacturer | : | Mazda Motor Corporation (3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima 730-8670) | |
| Classification | : | - | |
| Current status | : | Mass production | |
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| Model / Manufacture |
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| Model | : | 13B-MSP |  |
| Type | : | Gasoline | |
| Company name | : | Mazda Motor Corporation | |
| Familiar name | : | - | |
| Usage | : | Passenger car engine | |
| Installation model | : | Mazda RX-8 Type S | |
| Year of manufacture | : | 2003 |
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| Specification |
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| Cylinder arrangement, number of cylinders | : | Inline 2-rotor | |
| Cycle / cooling method | : | 4/water-cooled | |
| Valve type / number | : | None | |
| Combustion method | : | Fuel injection type | |
| Combustion chamber | : | Bathtub | |
| Total displacement | : | 654 x 2 cc | |
| Bore x stroke | : | 240.0×180.0 × 80.0 (rotary) mm | |
| Compression ratio | : | 10 | |
| Mass (weight) | : | 124 kg | |
| Ignition system | : | Full transistor type, battery ignition | |
| Radiator type | : | Corrugate type |
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| Performance |
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| Max. output | : | 184 kw (250 ps)/8500 rpm | |
| Max. torque | : | 216N･ｍ (22.0kg-m/5500 rpm | |
| Rate of fuel consumption | : | － |
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| Exhaust emissions measures | : | Three-way catalyst (monolithic) | |
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| Device |
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| Supercharger type | : | None | |
| Intercooler | : | None | |
| Variable device | : | None | |
| Intake system | : | Sequential dynamic air intake system | |
| Exhaust system | : | - |
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| Points of interest, topicality | : | This was the first rotary engine to feature a side exhaust port since the beginning of rotary engine mass production.
2003 JSME Medal for New Technology
2003 and 2004 International Engine of the Year
2004 RJC Technology of the Year | |
| Features | : | Excellent output, fuel economy and emissions levels were all accomplished. | |
| Reference materials | : | 2003 rotary engine (PR documents)
Mazda Technical Review No. 21 | |
| Introduction | : | Compared with previous rotary engines, the RENESIS featured substantially improved fuel economy and cleaner emissions while still realizing high output with normal aspiration. This was enabled by adopting innovative technologies such as a sequential dynamic air intake system and side exhaust port. The inherent characteristics of rotary engines, i.e., compactness, lightness, and high performance, were further advanced. The engine was used in the Mazda RX-8, a no-compromise sports car based on a completely new concept featuring 4 doors and 4 seats. | |
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