Toyota RI engine
The Toyota RI is a family of prototype four-stroke 2.0-litre single-turbocharged inline-4 racing engines, developed and produced by Toyota, for the Super GT series and Super Formula under the Nippon Race Engine framework. The RI engine is fully custom-built. Versions
The RI engine comes in two different versions for different applications; the RI4A for use in Super Formula and the RI4AG for use in Super GT. RI4A (2014–present, also known as TRD-01F)
RI4AG (2014–present)

Applications
Dallara SF14
Dallara SF19
Dallara SF23
Lexus RC F GT500
Lexus LC 500 GT500
Toyota GR Supra GT500

See also
Honda HR-414E/HR-417E/HR-420E engine, similar engines also developed under the Nippon Race Engine framework
Nissan NR engine, similar engine also developed under the Nippon Race Engine framework

References

Engines by model
Gasoline engines by model
Toyota engines
Four-cylinder engines
Straight-four engines
Toyota in motorsport