What Car? magazine has voted the 607 2.0 HDi S Peugeot model as Britain's Cleanest Executive Car.
Peugeot's 206 CC and 307 CC HDi models are equipped with Euro IV diesel engines and diesel particulate emission filters.
Peugeot introduced a diesel particulate emission filter on the 607 in 2000 and on a super-mini, the 206 GTi HDi 110, in 2004, the company said.