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Dilemma - S5 or A5 3.0 TDI

25651 Views 130 Replies 32 Participants Last post by  S5mons
I have been researching for a number of weeks comparing the S5 to the A5 TDI, I really would like to get other peoples opinions particularly from owners. I have test driven the 3.0TDI manual, very impressed with the torque, effortless pull and comfort level. For me manual is pointless 1st gear is used up too quickly, so it would be an auto with the TDI.

I have around 25k to spend +/-3k, my heart says S5 but the head is saying TDI. I only do 6k a year so this is really a toy, occasional trips to cornwall etc. Used only 6mths a year...
Questions:
Fuel – on paper the S5 does 23mpg combined, compared to 40mpg with the TDI, what are peoples real life figures? Is the sound of the V8 to hard to resist putting the footdown?
Tyres – how many miles do you get out of a set? Average Price per corner?
Servicing – my budget will get me an S5 with around 50k, how much will servicing be?
Anything to look out for with the S5 – heard some like the taste of oil?
Comments are welcome...
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.. and if you modify your 3.0TDI with ECU you can get something around 300-320BHP and 580-650NM. That means that it would keep up with the S5 V8 and at the same time you would think that TDI is much faster thanks to massive amount of torque and quite strong pull. Still, would go for the S5.
+1 on Mr Evil Derboy's last paragraph.

Surely no one can argue with that. What is more of an issue is when a decision based on econony/cost of running is masqueraded as one of real world driving enjoyment.

This isn't to say there's no enjoyment in a TDI, this is about the relative fun factor...:thumbsup:
+1 on Mr Evil Derboy's last paragraph.

Surely no one can argue with that. What is more of an issue is when a decision based on econony/cost of running is masqueraded as one of real world driving enjoyment.

This isn't to say there's no enjoyment in a TDI, this is about the relative fun factor...:thumbsup:
Exactly. I think theres a lot of diesel owners the world over (regardless of marque and model) that feel they need to justify why they went for a diesel car.

For me I'll sum it up thus: I love the power and economy of the 3.0TDI but if I could have a petrol engine that does the same thing then I wouldn't have bought a diesel.
Facelift S5 4.9 sec??? Jings that's fast!!
S5 all the way....if you can afford it. :thumbsup::thumbsup:

I dont believe in the diesel "sportscar", it does not exist. Diesel is for tractors and 4x4's.
.. and if you modify your 3.0TDI with ECU you can get something around 300-320BHP and 580-650NM. That means that it would keep up with the S5 V8 and at the same time you would think that TDI is much faster thanks to massive amount of torque and quite strong pull. Still, would go for the S5.
After 3 years in modified 3.0TDI and 2 months in S5 V8, I don't think modified 3.0TDI is faster by my feelings, so let's make some calculations, which I didn't do before:

in 200km/h

3.0TDI which is in 3200 1/min and if would have 600 N.m in these 3200 1/min (so it's not stock engine) in 6-th gear there is 1190 N.m on wheels.
4.2 FSI has 375 N.m in 4900 1/min and there is 1205 N.m on wheels.

It's due to different velocity ratio of gearboxes, so more torque of engine doesn't mean automatically more torque on wheels.

In rpm of the maximum torque:
3.0TDI 2000 1/min, 620 N.m (chipped engine) - on wheels 1229 N.m in 6-th gear
4.2FSI 3500 1/min, 440 N.m - on wheels 1326 N.m in 6-th gear

For those interested, overall ratio in top gear is:
3.0TDI: 1,983
4.2FSI: 3,014

Of course consumption is slightly different story, with 3.0TDI I had ~10 l/100km in the city, S5 ~17 l/100km, the same journeys.
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Come on RGB - don't delay the inevitable any longer....you'e been pontificating on this far too long....:swordfight:
Need to work out how much daughters wedding is going to cost first!!!
I dont believe in the diesel "sportscar", it does not exist. Diesel is for tractors and 4x4's.
The team behind the R10 might disagree. In fact much of the motoring press would disagree that an A5 sports car exists either.
The team behind the R10 might disagree. In fact much of the motoring press would disagree that an A5 sports car exists either.
Fair point, but we're talking endurance racers and the benefit of the diesel there is - guess what? - saving fuel, hence fewer pit stops and the competitive edge that can bring.

And also agree re. the second comment - the A5/S5, whilst showing some improvement on previous generations of Audi offerings, won't ever make headlines as the world's sporiest drive (I still gain more driving pleasure from the handling and sheer chuckability of Her TT 2.0 than I do the S5).

But the point, as has been made countless times before, is that if you really care about driving (as opposed to transportation), you'll have a petrol-engined motor in your garage (whether you have to postpone weddings, sell the grandma, take a less exotoc holiday, whatever, to afford to run one). It's that simple.

Diesel engines exist to satisfy an economy requirement. They serve no other purpose.

Are we all agreed now? :)
The team behind the R10 might disagree. In fact much of the motoring press would disagree that an A5 sports car exists either.
Your probably right that an A5 sportscar doesn't exist but an S5 is most definitely a sports coupe. :thumbsup:
Petrol has to be 1st choice for 99% of factors apart from economy and cost
Need to work out how much daughters wedding is going to cost first!!!
Now I feel bad for being a self indulgent motoring obsessed absent father....wait a minute, sounds like wifey....:wall:
After 3 years in modified 3.0TDI and 2 months in S5 V8, I don't think modified 3.0TDI is faster by my feelings.
It's okay, according to my feelings S5 V8 felt slower, of course that is only a feeling. There is no doubt that the acceleration itself is faster. There aren't many cars that felt fast after my car, even the RS5 didn't feel as fast as I expected and I was leaving the car with a feeling of disappointment. I am sure that in any case, S5 V8 is more of a car than the 3.0TDI and as I said many times before, this was my only diesel car. I am already looking for a replacement. Congrats on your S5 btw. There is far too many A5's on the roads now.
But the point, as has been made countless times before, is that if you really care about driving (as opposed to transportation), you'll have a petrol-engined motor in your garage (whether you have to postpone weddings, sell the grandma, take a less exotoc holiday, whatever, to afford to run one). It's that simple.

Diesel engines exist to satisfy an economy requirement. They serve no other purpose.

Are we all agreed now? :)
No. Not really. I care about driving. I just didnt want to pay to run an S5. That being the case the 3.0TDI is the next best performing unit behind it. Are you suggesting that I should have opted for a slower petrol engine in the car (3.2V6 or 2.0TFSI) in order to truly call myself someone who cares about driving?

You could level the same argument at yourself for buying an S5/A5 in the first place. You've said yourself that the TT (and I would agree having owned a 2.0TFSI TT) is more of a drivers car, as is a host of other vehicles that you can buy for S5 money.

If I really wanted to put my car above other things that I spend my money on and make the sacrifices that you describe, I would NOT have bought an A5 in the first place. In its place would be something with less under-steer, more communicative steering and a more dynamic chassis.

Some S5 drivers need to stop deluding themselves (as are some 3.0TDI drivers who say theirs is the better car to drive). It's not a Ferrari. It's not even a "drivers car" it's a very nice looking GT, that drives comfortably and is well put together.

To argue that youre not a REAL driver if you have a diesel is ironic as a REAL driver such as you describe wouldn't own an A5/S5 in the first place.
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So, if you're talking about current cars rather than facelift then the difference is only 0.8 of a second. Unless you are a track driver, 0.8secs at 0-60 is vistually meaningless in the real world.
Would have to strongly disagree with this statement. A .8 second difference can definitely be felt in real world driving. BMW states a one second difference between the 328i (normally aspirated 3.0L I6) and 335i (turbo version of the same engine) and having driven both cars, the difference is night and day.
And also agree re. the second comment - the A5/S5, whilst showing some improvement on previous generations of Audi offerings, won't ever make headlines as the world's sporiest drive (I still gain more driving pleasure from the handling and sheer chuckability of Her TT 2.0 than I do the S5).
You should try driving A5 2.0T sometime ;) I think you'll find it to be a lot more chuckable than your S5 as well.

The B8 chassis is actually quite good. The problem is that the 4.2FSI and 3.0TDI engines are very heavy and putting all that extra weight over the front axle creates a lot of understeer. Put one of those engines in the TT and it will feel clumsy as well.

On that note, I don't really see the appeal of the 3.0TDI. The 2.0T (211 hp version) is nearly just as fast (Audi quotes 6.2 seconds) and I don't see fuel consumption being much greater either. It's also cheaper and handles better.
You should try driving A5 2.0T sometime ;) I think you'll find it to be a lot more chuckable than your S5 as well.

The B8 chassis is actually quite good. The problem is that the 4.2FSI and 3.0TDI engines are very heavy and putting all that extra weight over the front axle creates a lot of understeer. Put one of those engines in the TT and it will feel clumsy as well.

On that note, I don't really see the appeal of the 3.0TDI. The 2.0T (211 hp version) is nearly just as fast (Audi quotes 6.2 seconds) and I don't see fuel consumption being much greater either. It's also cheaper and handles better.
Your argument is inconsistent and obviously biased given that you have a 2.0T. Audi quotes 6.5 seconds for the 2.0T Quattro - S-Tronic (facelift) and 5.8 for the 3.0TDI - S-Tronic

If the 0.8 seconds difference in 0-60 times is "Night & Day" why is it that a difference of 0.7 "is nearly just as fast"? (I would agree that it is but you just disagreed with yourself by saying the above)

And FYI the 1.8TFSI and 2.0TFSI model suffer understeer just as much. The engines may be lighter but its as much to do with position as it is weight. Ive driven the 1.8TFSI recently and "chuckable as a TT" it most certainly ain't!

In case anyone misunderstands where I'm coming from. I am not fighting some blind crusade for the 3.0TDI. I think that 3.0TDI owners who think their cars are faster/better than the S5 are kidding themselves.

I also think that any A5 owner out there thinks they are driving a sports car (whether it has an S or RS badge on it) is also kidding themselves. It's a nice car but there are better "drivers" cars out there for the money. And, hey, that's OK we don't all want to be track gods and most of us obviously take how the car looks into account and are therefore prepared to make trade-offs in other areas.

We all made our choices for reasons that suit ourselves. It's ludicrous to try to argue that our own choice is the best or better. Audi know what they are doing, if that was really the case the A5 would only be available to buy with one engine choice.
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In an S5 v 3.0 TDI debate there is no argument, S5 wins hands down. The 3.0 TDI is second rate and you will always feel like that when you see an S5 on the road.

The 3.0TDI is a sacrifice, primarily performance in favour of cost.

If money is no option the S5 is the only choice, I tend to find it slightly amusing people vouching for the 3.0TDI considering the prices of the cars and insurance etc, petrol/diesel cost differences are a fraction of total cost of the cars.

I have never and will never desire to drive a diesel A5, it never even crossed my mind.
In an S5 v 3.0 TDI debate there is no argument, S5 wins hands down. The 3.0 TDI is second rate and you will always feel like that when you see an S5 on the road.

The 3.0TDI is a sacrifice, primarily performance in favour of cost.

If money is no option the S5 is the only choice, I tend to find it slightly amusing people vouching for the 3.0TDI considering the prices of the cars and insurance etc, petrol/diesel cost differences are a fraction of total cost of the cars.
I worked it out based on annual costs split down into monthly payments. It was going to cost me 30% more a month to have an S5. For me personally it wasnt worth it, but my circumstances, needs and priorities are most likely different from yours, which is why I dont feel second rate when I see an S5 on the road.
Got to love these threads :)
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