Diesel Auto...is the mpg really that bad?

Yam · 22nd April 2015, 21:54

Right...
I'm homing in on a nice Zt auto to replace my lovely 75 connie derv.
There are plenty on here who cite very poor mpg compared with the manual.
Are they really that bad?
I'd expect about 5 mpg less than the manual....but some say its much worse.
Apologies to all who have posted about the same issue previously.

mamasboy · 22nd April 2015, 22:14

cant really advise but we had a pug 407 6 speed diesel auto and er indoors drove it exclusively for town use and she was averaging 23mpg. We have changed to a new Toyota aygo auto petrol and she gets around 45mpg from town driving.

first-things-first · 22nd April 2015, 22:29

ZT has 18 inch alloys so will probably be worse than a 75 with smaller wheels. Probably not by huge amounts...

I have a ZT auto diesel and have seen a true 45 MPG on a run and 34 MPG on mainly town driving. I don't drive for economy, but am not heavy footed. I feel I could get 50 MPG if I restrained speeds a little lower.

The_irish_rover · 22nd April 2015, 22:30

for what it's worth, I've previously had two derv 75s. My tourer auto would do low 30s around town and low 40s on a motorway. Compared to my manual derv, I was getting late 30s around town and late 40s on a motorway.

Nowadays I'm not really doing the mileage so fuel consumption isn't as important to me and if I were to get another I'd opt for the auto all day long as I personally believe the autobox suits the car better (just my opinion of course).

coolguy · 22nd April 2015, 23:05

My diesel Tourer auto returned 47+mpg on the 142 mile round trip to POL, including a queue of over one hour to get in, and regularly does similar on long runs. However, short runs in winter when it doesn't get warm return about 35mpg however I drive it.

clf · 22nd April 2015, 23:06

I would factor around a 25 percent drop in MPG. although the are different cars, my manual diesel passat gave around high 40s compared to the low to mid 30s I get with my zt auto. sitting in traffic on my commute, it is worth every penny of he additional fuel.

clf · 22nd April 2015, 23:06

Quote:

Originally Posted by clf

I would factor around a 25 percent drop in MPG. although the are different cars, my manual diesel passat gave around high 40s compared to the low to mid 30s I get with my zt auto. sitting in traffic on my commute, it is worth every penny of he additional fuel.

,.................... and even the extra tax

thomas 75 connie · 22nd April 2015, 23:22

My old diesel auto would get 36.6mpg on brim to brim not going over 70mph

Robson Rover Repair · 22nd April 2015, 23:34

My tourer did about 36mpg before remap, after mafless remap via reidy remaps I've yet to drop below 42mpg tank to tank, with big runs and European driving seeing just shy of 50mpg tank to tank.

MrDoodles · 23rd April 2015, 07:31

Depends of course on the type of journeys that you're doing!

Just bear in mind that the Official mpg figures for a ZT auto were;

28.3 Urban

54.7 Extra-Urban

and

40.9 Combined

From conversations that I've had with owners of both, I would expect the auto to return roughly 8 mpg less than a manual driven in the same manner!

22nd April 2015, 21:54	#1
Yam Avid contributor Jaguar XF Join Date: Jun 2012 Location: Black Country Posts: 229 Thanks: 11 Thanked 18 Times in 17 Posts	Diesel Auto...is the mpg really that bad? Right... I'm homing in on a nice Zt auto to replace my lovely 75 connie derv. There are plenty on here who cite very poor mpg compared with the manual. Are they really that bad? I'd expect about 5 mpg less than the manual....but some say its much worse. Apologies to all who have posted about the same issue previously.

22nd April 2015, 22:14	#2
mamasboy RS South East Ford fester... blah.... Join Date: Mar 2010 Location: Hastings Posts: 2,900 Thanks: 29 Thanked 78 Times in 42 Posts	cant really advise but we had a pug 407 6 speed diesel auto and er indoors drove it exclusively for town use and she was averaging 23mpg. We have changed to a new Toyota aygo auto petrol and she gets around 45mpg from town driving. __________________ the name's Bernard but you can call me nursie......

22nd April 2015, 23:06	#6
clf This is my second home MG ZT CDTi Join Date: Jan 2014 Location: carrick Posts: 7,859 Thanks: 3,494 Thanked 2,657 Times in 1,973 Posts	I would factor around a 25 percent drop in MPG. although the are different cars, my manual diesel passat gave around high 40s compared to the low to mid 30s I get with my zt auto. sitting in traffic on my commute, it is worth every penny of he additional fuel. __________________ It is not gloss primer .............. it is duct tape silver!

22nd April 2015, 23:34	#9
Robson Rover Repair NI/ROI RS ZT-T 190 / 75 Diesel x3 / 6 door limo / 216 Cabby / Rover 25 van Join Date: May 2009 Location: Antrim Posts: 8,104 Thanks: 299 Thanked 1,046 Times in 568 Posts	My tourer did about 36mpg before remap, after mafless remap via reidy remaps I've yet to drop below 42mpg tank to tank, with big runs and European driving seeing just shy of 50mpg tank to tank. __________________ Cheers, Colin Robson Rover Repair on Youtube DISCOUNTED MTEC BRAKES FOR ALL MG ROVER'S Braided hoses, more coating and pad options for 2024

22nd April 2015, 22:29	#3
first-things-first Posted a thing or two MG ZT Join Date: Jul 2014 Location: Hornchurch Posts: 1,255 Thanks: 176 Thanked 352 Times in 272 Posts	ZT has 18 inch alloys so will probably be worse than a 75 with smaller wheels. Probably not by huge amounts... I have a ZT auto diesel and have seen a true 45 MPG on a run and 34 MPG on mainly town driving. I don't drive for economy, but am not heavy footed. I feel I could get 50 MPG if I restrained speeds a little lower.

22nd April 2015, 22:30	#4
The_irish_rover Loves to post Rover 75 Join Date: Dec 2014 Location: Kent Posts: 448 Thanks: 273 Thanked 132 Times in 98 Posts	for what it's worth, I've previously had two derv 75s. My tourer auto would do low 30s around town and low 40s on a motorway. Compared to my manual derv, I was getting late 30s around town and late 40s on a motorway. Nowadays I'm not really doing the mileage so fuel consumption isn't as important to me and if I were to get another I'd opt for the auto all day long as I personally believe the autobox suits the car better (just my opinion of course).

22nd April 2015, 23:05	#5
coolguy Coolguy Rover 75 CDT Tourer Auto, Rover 75 2.0 Connoisseur Auto, MG ZT 2.5 Auto and MG ZT Cdti Auto (Monogra Join Date: Nov 2009 Location: Finedon Posts: 1,905 Thanks: 933 Thanked 638 Times in 430 Posts	My diesel Tourer auto returned 47+mpg on the 142 mile round trip to POL, including a queue of over one hour to get in, and regularly does similar on long runs. However, short runs in winter when it doesn't get warm return about 35mpg however I drive it.

22nd April 2015, 23:22	#8
thomas 75 connie This is my second home Rover 75 launch car x2, Rover 800 Vitesse Join Date: Jan 2009 Location: Plymouth Devon Posts: 8,463 Thanks: 1,115 Thanked 1,083 Times in 653 Posts	My old diesel auto would get 36.6mpg on brim to brim not going over 70mph

23rd April 2015, 07:31	#10
MrDoodles Banned MG ZT+ V6 190 Join Date: Nov 2011 Location: Spalding Posts: 13,245 Thanks: 369 Thanked 1,196 Times in 818 Posts	Depends of course on the type of journeys that you're doing! Just bear in mind that the Official mpg figures for a ZT auto were; 28.3 Urban 54.7 Extra-Urban and 40.9 Combined From conversations that I've had with owners of both, I would expect the auto to return roughly 8 mpg less than a manual driven in the same manner!