"20B" redirects here. For the isotope of boron (20B), see Boron-20.
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Reciprocating internal combustion engine
Wankel rotary engines
Overview
Manufacturer
Mazda
Also called
"RENESIS" (RX-8 engine)
Production
1967[1]–present
Layout
Configuration
Wankel engine
Displacement
0.4L 360 cc (22 cu in) 0.8L 798 cc (48.7 cu in) 1.0L 982 cc (59.9 cu in) 1.2L 1,146 cc (69.9 cu in) 1.3L 1,308 cc (79.8 cu in) 2.0L 1,962 cc (119.7 cu in) 2.6L 2,616 cc (159.6 cu in)
Combustion
Turbocharger
1982 & up
Fuel system
Carbureted or fuel injected
Fuel type
Gasoline
Oil system
Wet sump
Cooling system
Water
Output
Power output
100–700 hp (75–522 kW)[2][3]
Torque output
20–200 lb⋅ft (27–271 N⋅m)[4][5][6]
Dimensions
Dry weight
347 lb (157 kg)
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The Mazda Wankel engines are a family of Wankel rotary combustion car engines produced by Mazda.[7]
Wankel engines were invented in 1950s by Felix Wankel, a German engineer. Over the years, displacement has been increased and turbocharging has been added. Mazda rotary engines have a reputation for being relatively small and powerful at the expense of poor fuel efficiency. The engines became popular with kit car builders, hot rodders and in light aircraft because of their light weight, compact size, tuning potential and inherently high power-to-weight ratio—as is true for all Wankel-type engines.
Since the end of production of the Mazda RX-8 in 2012, the engine was produced only for single seater racing, with the one-make Star Mazda Championship being contested with a Wankel engine until 2017; the series' transition to using a Mazda-branded piston engine in 2018 temporarily ended the production of the engine. In 2023, Mazda reintroduced the engine as a generator for the 2023 MX-30 e-Skyactiv R-EV plug-in hybrid.
^"MAZDA: Chapter I：Opening a New Frontier with the Rotary Engine | History of Rotary Engine Development". www.mazda.com. Retrieved 7 February 2020.
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