Lower CO2 from new C5 engines 09 November 2009 by Parkers More power and lower CO2 New turbocharged petrol Integrated Bluetooth and USB Citroën is boosting the power of its diesel C5s while cutting CO2 emissions, as well as introducing a new turbo petrol model. A 160bhp 2.0 HDi diesel has replaced both the 140bhp 2.0 HDi and the 173bhp 2.2 HDi engines, and compared with the 140bhp versions has reduced CO2 emissions from 153g/km to 147g/km in the saloon. The Tourer version has also fallen by 6g/km but the cut from 155g/km to 149g/km means it is two BIK tax bands lower. The new diesel produces 251lb-ft of torque at 2000rpm, and its fuel consumption of 50.4mpg for the saloon and 49.6mpg for the Tourer represents an improvement of three per cent. The new petrol engine is a 155bhp 1.6-litre turbo that replaces the normally aspirated 143bhp 2.0-litre, and produces 177lb-ft of torque from 1400rpm.Compared with the old 2.0-litre petrol engine, emissions are reduced from 198g/km to 167g/km for the saloon, while fuel economy in improved by 18 per cent. Citroën has renamed the SX equipment grade VTR, although no changes in specification are made, while a new integrated Bluetooth system with USB socket are now standard on Exclusive models, allowing hands-free phonecalls and the ability to connect portable MP3 players directly into the car's audio system.