Citroen’s handsome-looking C5 that is available in both sedan and estate forms is entering the 2010 model year with a revised engine line-up and equipment upgrades in the UK. The key improvements concern the introduction of the BMW Group co-developed 1.6i 16V THP 155 HP petrol engine that takes the place of the outgoing 2.0i 16V 143 HP unit and the new 2.0 HDi 16V 160 HP diesel that replaces both the 2.0 HDi 16V 140 HP and the 2.2 HDi 16V 173 HP engines.

The 1.6-liter turbocharged petrol unit produces an output of 155 horsepower and 240Nm (177lb.ft) of torque at 1,400 rpm. Citroen claims that this represents an 8 per cent increase in power, combined with an 18.5 per cent increase in combined-cycle fuel economy and a 16 per cent reduction in CO2 emissions (down from 198g/km to 167g/km) over the previous 2.0-liter unit.

As for the new 2.0HDi 16V diesel, it provides an output of 160 horsepower and 340Nm (251lb.ft) of torque at 2,000 rpm. In comparison to the outgoing 140hp manual C5 Saloon, Citroen says that there’s a 14 per cent increase in power, a 3 per cent increase in fuel economy (combined cycle) and a 4 per cent reduction CO2 emissions (down from 153g/km to 147g/km).

In the UK, the SX trim level is renamed VTR while Citroen has upgraded the Exclusive models with a new integrated Bluetooth system with USB Box. Detailed pricing and performance figures can be seen in the spec sheets below.