The Toyota H engine was first produced in 1967 but did not reach road cars till 1972. It is not a successor to the older and larger Toyota D engine [ja].

This article relies largely or entirely on a single source. (January 2019)

H engine was then replaced by the 2H engine and the 12H-T turbo engine. It was succeeded by the more advanced SOHC HZ series engine.

The H is a 3.6 L (3,576 cc) inline 6, 12-valve OHV diesel engine.^[1] Bore is 88 mm and stroke is 98 mm, with a compression ratio of 21:1. Output is 95 PS (70 kW) at 3,600 rpm with 22.0 kg⋅m (216 N⋅m; 159 lb⋅ft) of torque at 2,200 rpm.^[1]

Applications

• Toyota Land Cruiser HJ45
• Toyota Dyna HU15 HU30
• Toyota Weapon carrier HQ15

The 2H is a 4.0 L (3,980 cc) inline 6, 12 valve OHV indirect injection diesel engine. Bore is 91 mm and stroke is 102 mm, with a compression ratio of 20.7:1. Output is 105 PS (77 kW) at 3,500 rpm - later production years 107 hp (80 kW) with 177 lb·ft (240 N·m) of torque at 2,000 rpm. This engine weighs 330 kg (728 lb) in European trim from 1985.^[2] Compared to its predecessor, the 2H proved to be much more reliable, running 1 million kilometers or more.

Applications

• Toyota Land Cruiser HJ47, HJ60, HJ75
• Toyota Dyna HU20, 30, 40, 50
• Toyota Coaster HB20, 30

The 12H-T is a 4.0 L (3,980 cc) inline 6, 12 valve OHV turbocharged direct injection diesel engine. Bore is 91 mm and stroke is 102 mm, with a compression ratio of 18.6:1. Output is 134 hp (100 kW) at 3500 rpm with 232 lb·ft (315 N·m) of torque at 1,800 rpm, on the stock configuration of 7PSI of boost.^[3]

• Toyota Land Cruiser HJ61
• Toyota Coaster HB20, 30