Compared to piston-cylinder engines, rotary engines are pretty rare. Nevertheless, rotary engines still have a cult-like following among many automotive performance and racing enthusiasts.
To set a baseline for our discussion, most modern gasoline-powered piston-cylinder engines reach their factory-set redline at 6,000 RPM. Diesel-powered cars, in turn, usually hit their redline at 3,500-4,500 RPM.
The Mazda RX-7, produced from 1978 to 2002, has a stock redline between 7,000 and 8,000 RPM, depending on the year model and trim.
On the other hand, the Mazda RX-8, produced from 2003 to 2012, had a 9,000 RPM redline for manual transmission (M/T) and 7,500 RPM for automatic transmission (A/T) models.