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Dilema between Mazda 3 Hatch vs Nissan Qashqai.

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Old 08-11-2018, 05:10 PM   #61
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Good luck man. Haha!
No luck this round.
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Old 08-11-2018, 05:10 PM   #62
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High but NA higher

But this contradicts what you say earlier about small cc with turbo,high compression???
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Old 08-11-2018, 05:46 PM   #63
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High but NA higher
Oh..then which kind of engine have normal or low compression?
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Old 08-11-2018, 05:55 PM   #64
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Relative to turbo cars, NA is higher so i guess u can say turbo is normal or low if thats how u wana call it. Tat was my point anyway

Oh..then which kind of engine have normal or low compression?
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Old 08-11-2018, 06:50 PM   #65
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Relative to turbo cars, NA is higher so i guess u can say turbo is normal or low if thats how u wana call it. Tat was my point anyway
No lah. You're the expert here. So i like to know which/how much are considered normal compression.
You said turbo engine have high compression then there must be a base for comparison.
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Old 08-11-2018, 07:00 PM   #66
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Not expert. My point was for similar compression, small cc cars with turbo are not ideal. no replacement for displacement is somewhat true. Ya la the comparison is NA has higher compression

No lah. You're the expert here. So i like to know which/how much are considered normal compression.
You said turbo engine have high compression then there must be a base for comparison.
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Old 08-11-2018, 07:06 PM   #67
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QQ is a more expensive car than Mazda 3. For that price, might as well bring on the Mazda 6 since you can afford a QQ.
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Old 08-11-2018, 08:09 PM   #68
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Lol! Good luck next round. COE increase $2k+.

No luck this round.
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Old 08-11-2018, 08:12 PM   #69
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There are pros and cons. Increasingly we see more cars turbocharging by the manufacturer because of the efficiency gains. Including F1 cars. So this is the trend now.

Not expert. My point was for similar compression, small cc cars with turbo are not ideal. no replacement for displacement is somewhat true. Ya la the comparison is NA has higher compression
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Old 08-11-2018, 08:13 PM   #70
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Mazda 6 too long...haha! And i also prefer hatch.

QQ is a more expensive car than Mazda 3. For that price, might as well bring on the Mazda 6 since you can afford a QQ.
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Old 08-11-2018, 08:21 PM   #71
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Not expert. My point was for similar compression, small cc cars with turbo are not ideal. no replacement for displacement is somewhat true. Ya la the comparison is NA has higher compression
What has capacity got to do with compression? Lol
1l engine doing 10:1 compression
10l engine doing 10:1 compression
Both have same pressure acting in the cylinder
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Old 08-11-2018, 08:35 PM   #72
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What has capacity got to do with compression? Lol
1l engine doing 10:1 compression
10l engine doing 10:1 compression
Both have same pressure acting in the cylinder
as mentioned, it's the turbo.

i didn't say the capacity had anything to do with the compression lol
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Old 08-11-2018, 09:41 PM   #73
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Compression ration is a measure of the cylinder's max volume against the min volume. So the higher the compression, means i can squeeze more air into the cylinder prior to igniting it which means, more power.

Lower compression are typically used for turbo cars because the turbo adds compression.

So if turbo + high compression = Ji Ba Boom!

What has capacity got to do with compression? Lol
1l engine doing 10:1 compression
10l engine doing 10:1 compression
Both have same pressure acting in the cylinder
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Old 08-11-2018, 09:56 PM   #74
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as mentioned, it's the turbo.

i didn't say the capacity had anything to do with the compression lol
Oh because i don't know what you're talking about lol

So the turbo main purpose is to add more air inside the engine. More air=more force acting on the engine block. Say it simpler means higher pressure.
Pressure is the measured unit for amount of boost. In simple physics Pressure=Force/Area

You put 10psi on a 333cc cylinder or a 1000cc cylinder, it is still 10psi in both cylinder, so whats the problem with turbo on a 333cc cylinder?
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Old 08-11-2018, 10:00 PM   #75
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Compression ration is a measure of the cylinder's max volume against the min volume. So the higher the compression, means i can squeeze more air into the cylinder prior to igniting it which means, more power.

Lower compression are typically used for turbo cars because the turbo adds compression.

So if turbo + high compression = Ji Ba Boom!
when u say a turbo adds compression, means say an engine has a compression ratio of 10:1, when the turbo kicks in, it becomes...?

anyway my view of small cc cars like QQ 1.2 is tat a small engine with turbo is really straining it.

those who go on long highway drives like NSH will know. no replacement for displacement.
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