These four-cylinder 1,560 cm³ engines require only eight valves, yet at the same time offer improved levels of driveability and environmental performance. For the 1.6 liter HDi FAP 82 kW (112 bhp), the maximum torque at 1,750 rpm increases from 240 to 270 N·m (199 lb-ft) (+ 12.5 %) while overboost rises from 260 to 285 N·m (210 lb-ft). Its maximum power is 82 kW (112 bhp) at 3,600 rpm (compared to 80 kW at 4000 rpm).

The new 1.6 liter HDi FAP 68 kW (92 bhp) for its part offers a maximum torque of 230 N·m (170 lb-ft) (compared to 215 N·m for the old engine block) at 1,750 rpm, with a maximum power of 68 kW (instead of 66 kW) at 4,000 rpm.

Compared with their predecessors, more than 50% of components in these new HDi FAP engines have been entirely redesigned. As in the new V6 3.0 liter HDi FAP and 2.0 liter HDi FAP Euro 5 engines that appeared in 2009, Peugeot is applying its Extreme Combustion Chamber System (ECCS) technology here. (Earlier post, earlier post.) This new-generation combustion chamber system offers:

• a lower compression ratio (16.0) benefiting performance and reducing emissions (including NO_x);

• an increase in the chamber diameter (+ 10 %), helping to reduce the quantity of incompletely burnt fuel as a result of less contact with the walls;

• a reduction of swirl (air movement in the combustion chamber) of nearly 10%, limiting heat loss against the walls.

This system is combined with a new common rail in which the injection pressure is now 1,650 and 1,700 bar respectively for the 1.6 liter HDi FAP 82 and 68 kW engines, as well as new 7-aperture injectors (instead of six previously)—piezoelectric for the 1.6 liter HDi FAP 82 kW, solenoid for the 1.6 liter HDi FAP 68 kW.

The engine control software has also been entirely redesigned to give this unit more complete injection patterns (up to five injections per cycle), improved operating quality and even better servicing diagnostics.

All of this helps improve the homogeneity of the air/diesel blend for maximum performance, reduced fuel consumption, a reduction at source of emissions and quieter combustion.

Each engine also uses a turbocharger (variable geometry for the 1.6 liter HDi 82 kW, fixed for the 1.6 liter HDi FAP 68 kW), with optimized dimensions. Because it is smaller it has a lower inertia, meaning its response time is reduced to a minimum. Lastly, the use of an optimized exhaust gas recirculation system (EGR valve) and reduced friction are technologies that allow optimal improvement of engine efficiency while limiting potential energy losses.

These HDi engine blocks are combined as standard with the particle emissions filter which now has a service interval of 180,000 km (112,000 miles).

Peugeot’s Euro 5 engine line up now includes:

207 range:

• 1.6 liter HDi FAP 82 kW (112 bhp) coupled with a 6-speed manual gearbox; CO₂: 117 g/km for the hatchback,
• 1.6 liter HDi FAP 68 kW (92 bhp); CO₂: 110 g/km for the hatchback,
• 1.6 liter THP 115 kW (156 bhp) coupled with a 6-speed manual gearbox; CO₂: 165 g/km for the hatchback,
• 1.4 liter VTi FAP 70 kW (95 bhp); CO₂: 137 g/km for the hatchback.

On the 308, gradual deployment of Euro 5 engines:

• 1.6 liter HDi FAP 82 kW (112 bhp) with the electronically-controlled 6-speed manual gearbox (BMP6); CO₂: 114 g/km on the hatchback,
• 1.6 liter HDi FAP 68 kW (92 bhp); CO₂: 115 g/km for the hatchback,
• 1.6 liter THP 115 kW (156 bhp) coupled with the 6-speed manual gearbox; CO₂: 153 g/km for the hatchback,
• 1.6 liter THP 115 kW (156 bhp) combined with a new 6-speed automatic gearbox; CO₂: 171 g/km for the hatchback,
• 1.4 liter VTi FAP 72 kW (98 bhp); CO₂: 144 g/km for the hatchback.

The 3008 and 5008 see the launch of the following new engines:

• 2.0 liter HDi FAP 120 kW (163 bhp) with a 6-speed automatic gearbox; CO₂: 173 g/km on the 3008,
• 1.6 liter THP 115 kW (156 bhp) with a new 6-speed automatic gearbox; CO₂:178 g/km on the 3008.

The coming months will also see the advent of new technologies at Peugeot, such as the electric car (iOn), the HYbrid4 (3008), and the development of “e-HDi” micro-hybrid engines (new generation Stop&Start).