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159 1750 TBi Economy

28K views 162 replies 59 participants last post by  epsonix 
#1 ·
What sort of economy are people seeing from the 1750 TBi engine...?

I have covered 500 miles in my 159 1750 TBi Ti Saloon so far... and have yet to see the Average MPG go above 25 mpg...

This is a combination of town and motorway driving... (around town only it drops to around 20 mpg...)

I saw 28 mpg when I had my BMW 325i SE Coupe... so was expecting at least the same.

I understand that the car's new... so maybe it'll improve... but wondered what other people were seeing...?
 
#143 ·
Mine now done 12,750 miles.

On 80% dual carriageway, and always within the limit, the trip computer shows between 29 and 30 MPG.
Checking using the same pump, at the same petrol station, across a full tank, I know the trip computer is optimistic by between 1 and 1.5 so my actual is between 27.5 and 29 MPG.

Only one thing to say:-

**** POOR

Will get past the last of the poor weather and grit and get it really clean, and then it's going back to the lease company for something a bit more frugal.

Giulietta 170 MA I think.
 
#146 ·
What about this chaps.

I managed 486 miles out of the last tank of liquid gold (unleaded). It worked out at 32.8 mpg so it is gradually getting better but still not the offical combined cycle.

Admitted it was mainly motorway miles and staying the right side of 75 mph but I haven't been driving like a complete granny.
 
#147 ·
We've got 35 mpg on Trip B now, total mileage just short of 7,500. Sticking to 70ish on the motorway but have been into city centres and caught in traffic jams too. Just using 6th on A roads, the tug is sufficient for overtaking as required. Also using the boost gauge - mpg is fine when it reads zero and mildly disturbing when you boot it - had 7mpg on the instant mpg readout when overtaking today!

There is a technique to getting better mpg and it seems to be improving with miles so we've decided to stick with the 159 TBi rather than swap to a Giulietta 170 diesel which was almost a dead cert 3 weeks ago (with 28mpg on Trip B).
 
#148 ·
........had 7mpg on the instant mpg readout when overtaking today!
You're not trying hard enough, :tut: :lol:. I'm consistently getting 4 (or slightly below) on mine during 'Italian tune-up' sessions.

Just filled it up tonight (£87!!!! :eek: :rant:) and worked out my brim to brim average over the last tankful as 33.7, so not too bad considering my enthusiastic style, :D.
 
#150 ·
UK spec TBi quotes 95 octane in the handbook. There is no mention of improved performance by using higher octane fuel, as I believe there is for some other current models (Mito Cloverleaf perhaps).
Tried mine once on a tank of BP Ultimate 97 Octane, but felt no difference in performance and economy was the same over the tank.
Got a settlement figure for mine last week from the lease company which I'm mulling over. Would need to replace it with something twice as economical to recover the settlement fee in a decent period of time. Might need to hang onto it for a bit.:(
 
#152 ·
UK spec TBi quotes 95 octane in the handbook. There is no mention of improved performance by using higher octane fuel, as I believe there is for some other current models (Mito Cloverleaf perhaps).
The 155HP Mito TB only achieves the 155HP using 98 RON according to the Owner's Manual, there is no such comment regarding any of the other Mitos engines.
 
#162 ·
Looks like this thread died 5 years ago. I'm averaging 30mpg as long as there are a few journeys outside of town driving. Drove from Chesterfield to Norfolk and back yesterday averaging 37.5mpg without hanging around. I've always been able to match or better the claimed manufacturer mpg. Must have a magic right foot.
 
#163 ·
No way for me. I average 21mpg(UK) - last 2.5kmiles. Mainly short distances, city, but no traffic jams (but plenty of traffic lights). The best I can do is 35mpg but that is constant speed of aroudn 60mph, the worse could be any, but say in city 16mpg driving very dynamically (reaching redline etc). 18" wheels and heavier SW body.
 
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