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 (2014–2023)
 * RI4BG (2024-present)

Applications

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