Designed and manufactured in France, the PureTech engines (a new family of 3-cylinder petrol engines) incorporate innovative technologies to deliver up to 25% lower fuel consumption.
Following the PureTech 130 S&S 6-speed manual turbocharged unit introduced last March, a new engine has been added to the C4 Range: the PureTech 110 manual gearbox. Based on the 3-cylinder architecture of the naturally aspirated engines in the PureTech family, the turbocharged versions are equipped with an advanced, high-performance turbo compressor (240,000rpm) and a central high-pressure direct injection system (200bars).
To withstand the additional stress borne by turbocharged engines, compared with naturally aspirated engines, parts have been strengthened.
-The aluminium cylinder head is reinforced with copper to withstand heavy loads
-The aluminium engine block (also used in the naturally aspirated version) is heat-treated, and the sleeves (poured, as for the naturally aspirated version) are coated with aluminium for better heat removal
-The crankshaft is steel (replacing the cast iron used for the naturally aspirated versions)
-The valves are hollow and contain sodium to better cool the valve heads
-The connecting rods are ultra-high-performance steel (high-yield strength, high mechanical resistance, high fatigue resistance)
-The engine is lubricated by a variable flow oil pump, with the pressure regulated by the engine control system to precisely adjust the flow and pressure to requirements
-The PureTech 110 manual gearbox engine delivers maximum power of 81kW (110hp EEC) at 5,500rpm and torque of 205 Nm at 1,750rpm, making the Citroën C4 responsive and agreeable to drive. This engine’s performance is 60.1 combined cycle and 110g of CO2 per km with ultra-low rolling resistance tyres.