LOK

two more cylinder? j/k

I think you need to tell more detail, like what kind of engine (inline 6, V6...), displacement, N/A or turbo...

LOK

原帖由 pkphilip 於 2008-5-30 19:18 發表
6 cylinders means more power, torque than 4 cylinders. It depends on the needs again, most fast cars has 6 cylinders or more.

Obviously more power = more gas.

Philip

6 cylinders doesn't mean more power, more torque.
What about STI and EVO? more torque and power than accord V6, camry V6, BMW 330/328, MB C300/C350...

LOK

You cannot say what's better.
S2000 is inline 4 N/A, 240hp
many inline 6 and V6 are also around 240hp

and you can't just compare hp, also need to compare the torque... and also what rpm is the max hp, max torque

LOK

原帖由 紅豆冰 於 2008-5-30 22:40 發表
I saw the auto magazine, it said 2.0-liter turbocharged four-cylinder with some 200 horsepower; a 3.2-liter V-6 with around 260; and 3.0-liter turbocharged diesel V6 making 233 horsepower.  So which o ...

it seems you were looking at Audi's engine?! it really depends on the design of the engines, it's hard to say 4 cylinder or 6 cylinder better.  Even both engine has same amount of cylinders, there are OHV, SOHC and DOHC... how many valves per cylinder... N/A, turbo or supercharge... compression ratio and some of the newer design have direct fuel injection system (FSI for Audi).
If you are really talking about Audi's 2.0T and 3.2, and you just want to know about power.  Just chip the 2.0L for less than $1000, it will have similar hp and torque as the 3.2.

原帖由 kencyliu 於 2008-5-30 23:02 發表
一個汽缸的容量最理想是大約五百c.c.左右，所以三千c.c.以下的通常是四缸，容量愈大，汽缸愈多。
你不會買到二千c.c.的六缸或三千c.c.的四缸汽車，便是這個原因。
另外STI是turbo-charged，不能和自然吸氣的AccordV6比較的。
...

both BMW and Mercedes have 6 cylinder engines which less than 3.0L
Even turbo engine, different turbo size and boost will have different output.  Can't just say turbo is better.  Some N/A engines have higher output than turbo engines even they have same displacement.

LOK

原帖由 kencyliu 於 2008-5-31 11:05 發表
我覺得turbo-charged engine 就像一個有蠻勁的年青人，V6就似一個成熟有內涵的成年人，不知對否？

You could say that...
"usually" V6 is more quiet, smooth, more low end torque.
turbo "used" to be not smooth as N/A engine, power feels like "suddenly" come when the turbo kicks in. but now, many cars just added a small turbo with low boost, very smooth too.
there are advantage and disadvantage for different design of engines, Straight(inline), V, W, Flat(boxer)... for the V engines, there are different angle due to different design, usually 60º, 90º, but the VW VR6 is only 15º (if i remember correctly).
The advantage of V engine are shorter/smaller engine block and less vibration.  But BMW has very good inline 6, Skyline GTR and Supra used to have inline 6 turbo too.

LOK

原帖由 blowfish 於 2008-6-3 10:07 發表
Please elaborate ths phrase. FI= Fuel injection?
NA= Natural Aspirated?

When he's talking about NA (Natural Aspirated), I believe FI = Force Induction.