y reg 600d x fuel consumption

[denlingo]

Ive noticed quite a difference in consumption going from my astravan 1.7cdti (turbo) to the 1.9d non turbo, the astra was taking about £10 per day but the lingo takes double that :O dont ask me what mpg Im getting as I dont have a clue but I was surprised the lingo takes double the amount each day, I thought seeing it is a 1.9 with no turbo it would be more economic. Is there any way of improving the consumption apart from the obvious such as not driving it as hard and keeping the tyres inflated to correct psi?