The Isuzu 6HE1 engine is a 6-cylinder, inline diesel engine with a displacement of 7.1 liters (7,127 cc). It is available in both naturally aspirated and turbocharged versions, with the turbocharged variant offering higher power and torque output. The 6HE1-T (turbocharged) engine typically produces between 165-260 horsepower and 330-560 lb-ft of torque.