The engine is a DT17TED4 Turbo Diesel which is connected to a BVA AM6C gearbox (more commonly known as a 2.7 V6 Twin turbo diesel) This engine can be found in a number of other vehicles including Peugeot, Land Rover, Range Rover and Jaguar.

Citroen quote - "The 2.7 HDi V6 diesel engine delivers 208bhp at 4,000 rpm and 325lb.ft of torque at 1,900 rpm. the engine satisfies the Euro IV emission standard and the HDi is equipped with a new generation Diesel Particulate Filter System (DPFS). The engine is linked to a new 6-speed auto-adaptive gearbox with 4 different modes that enables smooth control to be maintained in all conditions. The advanced automatic gearbox has the versatility to function in fully automatioc mode, sport mode, snow mode or sequential change mode, depending on the circumstances and the drive required".