turbo x500In terms of petrol engines, the entry-level 1.6-litre unit has an average of 42.2mpg and 147gkm, while the turbocharged 1.4 with 138bhp is the more economical choice at 47.1mpgIn terms of petrol engines, the entry-level 1.6-litre unit has an average of 42.2mpg and 147gkm, while the turbocharged 1.4 with 138bhp is the more economical choice at 47.1mpg