159 trip computer accuracy - Alfa Romeo Forum
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159 trip computer accuracy

I find the trip computer(s) on the 159 very useful, but have never checked the accuracy. I did that today at the latest tank refill.
The computer reckons I had averaged 40.2mpg over the last 500 miles, but my calculations make it 41mpg.

That's close enough for me - anyone else checked the accuracy ?

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Re: 159 trip computer accuracy

Well, dare I say I have blind faith in Italian electronics! No, to be serious I have never checked it although, having just changed my wheels to 18s with them being very slightly bigger than 17s I think I might just check it out.

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Re: 159 trip computer accuracy

I hope mine is under-reading Mine is doing at best 27mpg but then I do drive it quite hard
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Re: 159 trip computer accuracy

My 2.2 is averaging 26mpg
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Re: 159 trip computer accuracy

I've had my 159 for 6 months now. I find that the trip meter is not as accurate as the the Fiat Stilo Abarth that I had. I alway check the consumption by a manual calculation and compare it to the trip meter. In the Stilo they were very similar, in the 159 the trip meter always shows better mpg than the manual calculation. The trip meter is suggesting about 29mpg the reality is about 26mpg.
The petrol consumption is interesting. In the Stilo I got an average of 29mpg compared to the 159's 26mpg. Driving over exactly the same route to work and back I did not expect the number to be so low. Moving from a 5 cylinder engine with 2.4L to a 4 cylinder engine with 2.2 I expected the consumption to either be slightly better or the same. Still I suppose the extra 15bhp has to come from somewhere!
Don't get me wrong I'm not complaining about the consumption I love the car and that makes up for the extra petrol.
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