At Paris Motor Show in early October, Volvo Cars is presenting economical new diesel variants of the C30, S40 and V50 models with fuel consumption of just 4.4 litres/100 km (C30) or 4.5 litres/100 km (S40 and V50). The corresponding CO2 figures of 115 and 118 g/km mean that the C30 and V50 have best-in-class CO2 emissions in their segments. All three models - the C30, S40 and V50 - are equipped wi...