Who the he.. told you that AC would eat up that much HP?

I would say 2, maybe 3%.....ABSOLUTELY MAX!

(although i have no facts to back this up, and i can't be bothered to google it)

Hi,

I recall that some old mechanic mentioned this when i was visiting car repair shop with friend of mine, but that was 7-8 years ago. I google it and found some interesting posts in the net which states that with modern engines the performance should not suffer that much  even tough that some of those people where talking about V6 engines ( I am not sure how 4 cylinder ones will perform). However obviously with modern technologies this issue is gone.  

rendeto - nowadays it is so hard to find anything relevant in internet

 

However from my personal experience - I was driving various turbo diesel and turbo petrol cars - from 75 HP to 260 HP - I do not feel any significant change in power with AC on/off. Yes, you can feel slight difference, but not that much, that can be described as 30 %. BUT what I've really noticed - difference in power when air temp goes over +25C (even if AC is off) - especially in twin turbo Volvo which I drive now. Turbos like cool air

rendeto - nowadays it is so hard to find anything relevant in internet

 

However from my personal experience - I was driving various turbo diesel and turbo petrol cars - from 75 HP to 260 HP - I do not feel any significant change in power with AC on/off. Yes, you can feel slight difference, but not that much, that can be described as 30 %. BUT what I've really noticed - difference in power when air temp goes over +25C (even if AC is off) - especially in twin turbo Volvo which I drive now. Turbos like cool air

Yep, true about cool air, because i went once to watch WRC rally and someone told me that they put ICE in the inter cooler or something related to the turbo for better performance. But even if the temp is above +25C the engine with turbo will still over perform the one without it, right? 

But even if the temp is above +25C the engine with turbo will still over perform the one without it, right? 

 

You mean the same size on an engine? If yes - then of course. Is there any non-turbo diesel those days in passenger cars (excluding those made in India, China, etc)? Probably not.

 

And regarding the petrol - even BMW who in the past have said 'never turbo, never FWD' - put a turbocharger to 2.0 liter petrol. Only mazda now is saying, that instead of turbocharging they will play with bigger fuel pressure and compression ratio and their are getting 165 HP/208 Nm and 139 g Co2 from 2.0L non turbo. I don't know if it is impressive, because latest Volvo 2.0L turbocharged engine delivers 245 Hp/350 Nm (!!!) and 149 g Co2.

You mean the same size on an engine? If yes - then of course. Is there any non-turbo diesel those days in passenger cars (excluding those made in India, China, etc)? Probably not.

 

And regarding the petrol - even BMW who in the past have said 'never turbo, never FWD' - put a turbocharger to 2.0 liter petrol. Only mazda now is saying, that instead of turbocharging they will play with bigger fuel pressure and compression ratio and their are getting 165 HP/208 Nm and 139 g Co2 from 2.0L non turbo. I don't know if it is impressive, because latest Volvo 2.0L turbocharged engine delivers 245 Hp/350 Nm (!!!) and 149 g Co2.

I am not sure about diesels, but for the petrol (for example) Honda's passenger cars are without turbo. Yes, they have 2.4L petrol, but somewhere i read that 1.8 TSI is pretty much comparable with it (even over perform it in some situations/areas). If you drive normal 1.8 with AC ON and 1.8 TSI with AC ON (forget about temperature , etc) just compressor to be ON and if you have the chance to have your family on board + loaded and you have to overtake there is no doubt who from both engines is better. By the way 50-60 Nm and 10-30PS above is a big difference in the petrol, at least these engines I've driven.

Edited 6 November, 201312 yr by rendeto

Yes, naturally aspirated petrol engines are still available in many passenger cars, and some of them are really good (in Porsche 911 for example ) 

But if to take normal family cars, as you mention Honda 2.4i then I would not consider this one at any circumstances. Yes it has 201 Hp, but only 230 Nm and the range of max toque is funny - 4200-4400 rpm...Accord with this engine does 9.6 until 100 km/h and Co2 is 195 g. It is an engine from last century

 

Some years ago I was driving Mazda 6 Touring with 2.0i engine. In city it was so-so, but driving on country roads no fun at all. If you want safely to overtake, you need to downshift from 5 to 3rd and rev it until red-line. And still it was SLOW. 

Yes, naturally aspirated petrol engines are still available in many passenger cars, and some of them are really good (in Porsche 911 for example ) 

But if to take normal family cars, as you mention Honda 2.4i then I would not consider this one at any circumstances. Yes it has 201 Hp, but only 230 Nm and the range of max toque is funny - 4200-4400 rpm...Accord with this engine does 9.6 until 100 km/h and Co2 is 195 g. It is an engine from last century

 

Some years ago I was driving Mazda 6 Touring with 2.0i engine. In city it was so-so, but driving on country roads no fun at all. If you want safely to overtake, you need to downshift from 5 to 3rd and rev it until red-line. And still it was SLOW. 

This exactly what i meant. That is way i am searching for turbo charged petrol (due to less miles per year) and hope that it will perform better than aspirated petrol engine. I will go for a test drive for sure, but what my friends told me, who driven such cars, it is perfect. 

At least from internet/youtube reviews - 1.8tsi + DSG 7 is a very good combination and well perceived by automotive journalists. 

Just remember, that turbo engines needs little bit more care comparing to naturally aspirated - if you plan to keep the car for >3 years >100.000 km. 

 

There are 3 main rules:

 

- good oil + regular oil change

- do not drag race when car is cold

- if you need to stop right after sporty driving (or high speed driving) do not switch off engine for 2-3 minutes. Let it work on idle.

 

Good luck

Hi,

Swapped my previous Octavia Scout for a 1.8 4x4 Superb Estate (manual), but although I really like most aspects of the car, i could get on with the engine.  Having driven diesels for probably 10 years, this needed to be really rev'd to get moving and as a consequence the econamy was horrible.  The garage had a 30 day no quibble swap policy, so I ended up spending a chuck more cash on swapping to a 170TDi 4x4 Superb Estate Manual and am truly delighted with the car, slightly noisier under load than the petrol, but a much more relaxed car to drive.

I would strongly advise you to drive both and see what's right for you.

At least from internet/youtube reviews - 1.8tsi + DSG 7 is a very good combination and well perceived by automotive journalists. 

Just remember, that turbo engines needs little bit more care comparing to naturally aspirated - if you plan to keep the car for >3 years >100.000 km. 

 

Hi, I have the 1.8TSI combined with the DSG7 and it is a really nice combination! Super smooth and very quite and it was my choice over the 170TDI 4x4 DSG6 combo, not to mention a whole lot cheaper ...

 

Have a nice day!

Hi, I have the 1.8TSI combined with the DSG7 and it is a really nice combination! Super smooth and very quite and it was my choice over the 170TDI 4x4 DSG6 combo, not to mention a whole lot cheaper ...

 

Have a nice day!

Hi Anders,

 

I know that DSG (especially 7 speed one) does not have very positives that you can say about it when we are talking about reliability. And now i saw this one http://www.briskoda.net/forums/topic/295334-vw-recall-for-7-speed-dsg-vehicles/ and still wondering for additional money I may spent on it, does it worth it or i can put my cash for additional extras. 

By the way, how is yours performance when fully loaded plus overtaking?

As LS108 mentioned in above, what about elasticity when you have to overtake and you are loaded?

 

Hi Anders,

 

 

I know that DSG (especially 7 speed one) does not have very positives that you can say about it when we are talking about reliability. And now i saw this one http://www.briskoda.net/forums/topic/295334-vw-recall-for-7-speed-dsg-vehicles/ and still wondering for additional money I may spent on it, does it worth it or i can put my cash for additional extras. 

By the way, how is yours performance when fully loaded plus overtaking?

As LS108 mentioned in above, what about elasticity when you have to overtake and you are loaded?

 

 

Hi!

 

Well, when it comes to the reliability I can't say much since I haven't had it for long. What I did was talking to maybe 20 owners of the DSG7 from 2009-2011  that had their cars for at least 3-5 years often driving them 20-30.000 km's per year and none had seen a major problem, some were aware of some software upgrades being performed but nothing more ... I hope I am among the lucky ones for the 5 years and 60-70.000 km's I plan to have it. One thing for sure, I will never go back to a converter based sluggish auto after this!

 

I have never been driving it fully loaded but with two adults and some luggage we spent 600 km's doing 130-140 km/h on the highway and I never felt any weakness or that I suffered from power when overtaking.

 

Why not try it at the dealers and make up your own mind?

 

Have a nice afternoon!

Hi!

 

Well, when it comes to the reliability I can't say much since I haven't had it for long. What I did was talking to maybe 20 owners of the DSG7 from 2009-2011  that had their cars for at least 3-5 years often driving them 20-30.000 km's per year and none had seen a major problem, some were aware of some software upgrades being performed but nothing more ... I hope I am among the lucky ones for the 5 years and 60-70.000 km's I plan to have it. One thing for sure, I will never go back to a converter based sluggish auto after this!

 

I have never been driving it fully loaded but with two adults and some luggage we spent 600 km's doing 130-140 km/h on the highway and I never felt any weakness or that I suffered from power when overtaking.

 

Why not try it at the dealers and make up your own mind?

 

Have a nice afternoon!

First sorry for the late response. Second - thanks for the info. I will try them both, but for the extra money for the DSG and less miles per year (mainly on the highway)  may be i will put my cash for extras, will see