The Toyota GR Corolla’s three-cylinder turbocharged engine uses a split cooling system where the turbocharger is intentionally cooled to a lower temperature than the engine block itself, because engineers discovered that keeping the turbo cooler reduces lag more effectively than traditional intercooling, yet this temperature differential creates internal stress cycling that limits engine lifespan compared to conventional designs—forcing Toyota to essentially trade longevity for responsiveness.
Car Fact #120 — October 14, 2026
