Facts about Mazda RX-7 Rotary Engine
- 08
Despite a combined displacement of only 1.3 liters, the twin-rotor 13B-REW engine in the 1993 FD RX-7 produced 255 horsepower in Japanese-market trim.
- 07
Three complete revolutions of the eccentric output shaft occur for every single rotor revolution in the Mazda RX-7's 13B engine, reflecting the Wankel design's fixed 3:1 gearing ratio.
- 06
Rotary engines in the RX-7 rely on metered oil injection that deliberately burns a small amount of oil to lubricate the apex seals during combustion.
- 05
In the third-generation RX-7 (FD), Mazda used a twin-turbocharged 13B-REW rotary engine, making it one of the first production cars with a sequential twin-turbo system.
- 04
A key advantage of the Mazda RX-7 rotary engine is its high power-to-weight ratio, achieved because the Wankel design has far fewer moving parts than a comparable piston engine.
- 03
Apex seals in the Mazda RX-7 rotary engine tip the spinning rotor against the housing, serving a role analogous to piston rings in conventional engines.
- 02
Unlike piston engines, the Mazda RX-7 rotary engine completes all four thermodynamic cycles — intake, compression, combustion, and exhaust — simultaneously in different chambers.
- 01
The Mazda RX-7's rotary engine uses a triangular rotor spinning inside an epitrochoidal housing instead of conventional pistons to generate power.