Discussion
I'm no mechanic, but for some reason I am rapidly going off the idea of diesels. A friend of mine has an A3 and always has DPF issues, and my wifes car is due an oil service at just 7k miles apparently due to "the way she drives".
And it's greasy. And petrol smells good! So as I look at the Audi A7, I'm considering the 3.0 TFSi. But then it's sooo hard to ignore the BiTDi. I don't do a great deal of miles, around 8k a year I expect. An average day I cover around 10 miles, but we do few day trips from time to time too.
So what do you lot think?
And it's greasy. And petrol smells good! So as I look at the Audi A7, I'm considering the 3.0 TFSi. But then it's sooo hard to ignore the BiTDi. I don't do a great deal of miles, around 8k a year I expect. An average day I cover around 10 miles, but we do few day trips from time to time too.
So what do you lot think?
I have driven both (in the A6) and as a petrolhead would go for the BiTdi everytime.
Its a great engine, a couple of guys at work have that engine in the A6 Allroad and have no issues with reliability (I know its a small sample). I had the 3.0 single turbo in the A6 (C6) and did 118k miles with no engine problems at all
Its a great engine, a couple of guys at work have that engine in the A6 Allroad and have no issues with reliability (I know its a small sample). I had the 3.0 single turbo in the A6 (C6) and did 118k miles with no engine problems at all
Depends how long you intend to keep it and whether you'll own or lease?
If it'll be new/leased and therefore somebody else's problem when the DPF clogs up at a few years old then it might be OK over the time you might plan to have it. Although if you get DPF faults in your ownership I'd expect a garage to say it's down to usage and bill you.
If your typical commute is 5 miles each way then diesel isn't a great/necessary choice.
Factor in a new vehicle requiring AdBlue refills probably twice a year at that sort of mileage (not expensive but amazed at the number of people who've bought diesels completely oblivious to its presence)
My wife's S5 Sportback has the TFSI lump and it's really sweet. Newer ones have a different supercharger and ECU and are better on fuel as a result. Ours (2011) is quite disappointing, for the performance, if I'm honest.
If it'll be new/leased and therefore somebody else's problem when the DPF clogs up at a few years old then it might be OK over the time you might plan to have it. Although if you get DPF faults in your ownership I'd expect a garage to say it's down to usage and bill you.
If your typical commute is 5 miles each way then diesel isn't a great/necessary choice.
Factor in a new vehicle requiring AdBlue refills probably twice a year at that sort of mileage (not expensive but amazed at the number of people who've bought diesels completely oblivious to its presence)
My wife's S5 Sportback has the TFSI lump and it's really sweet. Newer ones have a different supercharger and ECU and are better on fuel as a result. Ours (2011) is quite disappointing, for the performance, if I'm honest.
We've had our TFSI V6 for 2 years with no problems on a short commute with PCV, although I suspect Audi disabled the EGR after I complained about oil consumption.
DPF is very much load related, and they are better than the early models, but for low annual mileage I can't see the point of an overly complex diesel lugging a chunk of exhaust aftertreatment about
DPF is very much load related, and they are better than the early models, but for low annual mileage I can't see the point of an overly complex diesel lugging a chunk of exhaust aftertreatment about
xjay1337 said:
TDI are no worse for clogging up than TFSI / TSI engines which are awful.
Intakes and pcv systems can get very clogged up.
a diesel driven correctly will have virtually no dpf issues.
Eh? I had my TFSi for 55,000 miles and never had a problem. I've swapped it for a diesel and I'm regretting it.Intakes and pcv systems can get very clogged up.
a diesel driven correctly will have virtually no dpf issues.
RammyMP said:
xjay1337 said:
TDI are no worse for clogging up than TFSI / TSI engines which are awful.
Intakes and pcv systems can get very clogged up.
a diesel driven correctly will have virtually no dpf issues.
Eh? I had my TFSi for 55,000 miles and never had a problem. I've swapped it for a diesel and I'm regretting it.Intakes and pcv systems can get very clogged up.
a diesel driven correctly will have virtually no dpf issues.
The BiT isn't a problem with short journeys, my commute has now (2 years ago lol) dropped to 8 miles a day, you just need to make sure you give it a good run once a week and get the oil temp >85deg and run for about 15mins to allow the regen to trigger and complete. Been doing that for 2 years and not had any DFP problems.
Big problem you'll find is the TFSI is very rare!
It still took me 12 months to find a BiT in the spec I wanted, but still had to settle for "Audi detestation white" lol
Real world driving the BiT is a beast the torque is immense coupled with the sports diff its good drive for a 2T wagon.
Big problem you'll find is the TFSI is very rare!
It still took me 12 months to find a BiT in the spec I wanted, but still had to settle for "Audi detestation white" lol
Real world driving the BiT is a beast the torque is immense coupled with the sports diff its good drive for a 2T wagon.
I've had my BiTDI A6 since Sept 15. It is the latest 320PS unit. It's just stonking for hooning around yet gives high 40s mpg on a long run.
For its ability to move 2 tonnes of car in an overtake, only an RS is going to trump it.
For a drive down to Haute Savoie, it will get you almost all the way there at a steady 85mph.
For its ability to move 2 tonnes of car in an overtake, only an RS is going to trump it.
For a drive down to Haute Savoie, it will get you almost all the way there at a steady 85mph.
blueg33 said:
TFSI cars clogging up is a well known issue
Almost, it's the non-turbo FSI engines which tend to clog up massively for relatively low mileage (RS4 being the worst culprit). The pressurised air from the Turbo in a TFSI engine blasts away the deposits which would try to stick to the back of the valves and manifold as seen in my 100k mile TFSI engine strip-down which only had a tiny amount of carbon build up as opposed to a 40k mile FSI RS4 engine which almost needed a shovel to scrap the carbon away 
KungFuPanda said:
If you go for the petrol, you should be looking for a sizeable discount over the comparable, more attractive diesel. I got my A8 with a £3k-£4K saving over a comparable 3.0tdi of the same model.
Broadspeed are quoting a £14.5k saving on either model, so the petrol will be £5k cheaper than the diesel, at about £40k.https://broadspeed.com/new_cars/Audi/A7/Choose_Num...
IanH755 said:
Almost, it's the non-turbo FSI engines which tend to clog up massively for relatively low mileage (RS4 being the worst culprit). The pressurised air from the Turbo in a TFSI engine blasts away the deposits which would try to stick to the back of the valves and manifold as seen in my 100k mile TFSI engine strip-down which only had a tiny amount of carbon build up as opposed to a 40k mile FSI RS4 engine which almost needed a shovel to scrap the carbon away
No it doesnt. Carbon build up is a big problem on the turbo engines. You just don't lose as much power because of the turbo. I know personally of many tfsis (golf gti audi a3 etc) which suffer.
You just get little niggles like rough idle as opposed to a 30% power loss lol.
xjay1337 said:
No it doesnt. Carbon build up is a big problem on the turbo engines. You just don't lose as much power because of the turbo.
I know personally of many tfsis (golf gti audi a3 etc) which suffer.
You just get little niggles like rough idle as opposed to a 30% power loss lol.
I've had 3 cars with TFSi engines and never had a problem. Likewise between myself and her in doors we've had a few diesels with a dpf and never had a problem. The missus does low mileage as well. I know personally of many tfsis (golf gti audi a3 etc) which suffer.
You just get little niggles like rough idle as opposed to a 30% power loss lol.
It's mainly the 4 cylinder TFSI engines (n/a and turbo) and the old B7 RS V8 that suffer with varnishing issues with the inlets
The OP I'm assuming is looking at TFSI in terms of the supercharged V6, available in the A5/6/7 rather than the 4 cylinder, which has no issues reported aside from occasional PCV related issues but that's on cars well out of warranty now.
The OP I'm assuming is looking at TFSI in terms of the supercharged V6, available in the A5/6/7 rather than the 4 cylinder, which has no issues reported aside from occasional PCV related issues but that's on cars well out of warranty now.
adaM3 said:
So there seems to be plenty of people on both sides of the fence!! Ha. So you can see why I'm going around in circles with this.
Something is telling me to get the petrol, but I'm finding it hard to dismiss that bi turbo beast.
I would give one a try, I was fairly dismissive until I drove one.Something is telling me to get the petrol, but I'm finding it hard to dismiss that bi turbo beast.
Yertis said:
adaM3 said:
So there seems to be plenty of people on both sides of the fence!! Ha. So you can see why I'm going around in circles with this.
Something is telling me to get the petrol, but I'm finding it hard to dismiss that bi turbo beast.
I would give one a try, I was fairly dismissive until I drove one.Something is telling me to get the petrol, but I'm finding it hard to dismiss that bi turbo beast.
If you can find an S5 Sportback facelift (post 2012) that'll give a pretty decent idea of how the engine performs, for comparison
You could always remove any doubt about fuel choice and go for an S7
there's one in my local showroom and it looks ace, although the lack of a centre rear seat rules it out on practicality grounds for me. The 4.0T is most definitely awesome!
You could always remove any doubt about fuel choice and go for an S7
there's one in my local showroom and it looks ace, although the lack of a centre rear seat rules it out on practicality grounds for me. The 4.0T is most definitely awesome!Gassing Station | Audi, Seat, Skoda & VW | Top of Page | What's New | My Stuff