The Toyota 1HZ is a legendary 4.2L (4164cc) inline‑six naturally aspirated diesel engine, launched in 1990 with SOHC 12‑valve layout, cast‑iron cylinder block and indirect mechanical fuel injection. It delivers 129 HP / 96 kW at 3800 rpm and peak torque 285 N·m at 2200 rpm. Without turbocharger and complicated electronic control parts, this engine features ultra‑high reliability, simple maintenance and excellent durability for tough conditions. Widely fitted for Toyota Land Cruiser 70 / 80 Series and Toyota Coaster buses, it is a favorite choice for off‑road, mining, agricultural and remote‑area commercial vehicles with a service life over 500,000 kilometers.

Toyota 1HD Series (1HD‑T /1HD‑FT /1HD‑FTE) Brief Introduction

• 1HD‑T (12‑valve): Max power 164 HP /122 kW, peak torque 361 N·m at low‑mid rpm