The data indicates that all Citroen C4 Grand Picasso (2007-11) 5-door MPV models with the specified description are equipped with a 1.6-liter HDI diesel engine. Notably, 100% of these vehicles use diesel as their primary fuel, highlighting their exclusive reliance on diesel engines within this model range. This uniformity suggests that consumers looking for this vehicle type can expect consistent engine specifications, particularly related to engine capacity and fuel type.