Keeping your fleet green is not an easy thing to do but Citroen should make it easier with the introduction of the C4 Bioflex. This is the French maker’s first flexfuel vehicle to be launched in Europe, and it has the ability to run seamlessly on low-carbon E85 bioethanol, regular unleaded or a mixture of both in its 1.6-litre engine.
Already proven in Brazil, the flexfuel models currently accounts for 80 per cent of Citroen sales, the Company is now introducing the technology to Europe as availability of E85 fuel increases. The car is set to be priced the same as the equivalent petrol models, and is on sale now.
According to Citroen when E85 bioethanol is being used, CO2 emissions on a “field-to-wheel” basis drop by 40 percent compared to standard fuel. Its oxygen-containing, sulphur-free properties also help reduce other harmful pollutants, particularly carbon monoxide (CO). At the same time CO2 emissions fall by 5 percent from 169g/km to 160g/km on the combined cycle.
As an added bonus, when running on E85 bioethanol, performance for the 1.6i engine is boosted by 2.5 percent to give a maximum output of 113bhp (compared to 110bhp on standard unleaded) at 5,800rpm and a 4 percent improvement in torque from 147Nm to 153Nm at 4,000rpm.
In order to accommodate the flexibility afforded to the C4 BioFlex, modifications have been made to the engine, such as the rings and valve seats, as well as the fuel circulation system, including the tank, fuel gauge and pump module, pipes and fuel filter. The engine’s intelligent ECU software has also been adapted to monitor the alcohol content of the fuel mix, and automatically recalibrate the operating curve to optimise performance. As a result of all this, regardless of the fuel type or mixture, there is no discernible difference in the driving experience.
Simon McBride