The Fiat engine, manufactured at FPT facility in Turin, will equip locally manufactured buses in Beijing. The engines are used in Fiat Iveco vehicles and were developed in cooperation with the Italian Ministry of Environment and Territory. Between 2002 and 2004, Fiat supplied Beijing Transport Company with 320 natural gas engines, which are currently applied in buses.

The N60 ENT G is a turbocharged 5.9-liter, 6-cylinder, inline engine that develops 147 kW (197 hp) of power and 650 Nm of torque. Using a stoichiometric combustion process, based on a suitable air/fuel ratio, and with a three-way catalytic exhaust aftertreatment system, they comply with the European Enhanced Environment-friendly Vehicle (EEV), which will come into force much after 2010 for standard production diesel vehicles.

EEV is a voluntary standard with the most stringent emissions levels yet established by the European Community. EEV emissions are lower than the Euro 5 truck and bus emissions scheduled for introduction in 2008, and are defined in the European Performance Standard. EEVs could be certain clean diesel, CNG, LPG or hydrogen-fueled combustion engines; hybrids; electric vehicles; or hydrogen fuel cell vehicles. (Earlier post.)