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Originally Posted by DGthe3
Noise, vibrations, and harshness probably. For a luxury car its better to have a V6 than an I4, and V8 over a V6.
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60 Degree V6. The now dead 3.8L still required a balance shaft.
Quote:
Originally Posted by FenwickHockey65
Some new info coming in...
There's a sport model in the works. Possibly named GS. 280 HP, 3.6L SIDI V6, 19" wheels, Brembo brakes, optional AWD, possible 6-speed manual...
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Flashy thingy!!!!!!!!!!!!!!!
Quote:
Originally Posted by ArcAngel
I dont know man , Acura TSX 4 cyl, Audi A4 4 cyl, VW CC 4 cyl,Saab 9-3 4cyl from what I here C-class gonna offer a new kompressor 4 cyl and 3 series getting a TT4 cyl model called GT. Four cyl are not the same as they used to be plus with the proper gearing, engine mounts, sound deadening material etc etc all that is alleviated. MPG goes up weight goes down win win
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There are things you can do with a 4 cylinder, but it still requires balance shafts and other tricks to deal with an engine that is not balanced.
Quote:
Originally Posted by DGthe3
Its not about the engine output, you can get an I4 to rival some V8s in power and torque if you really want. But you can't recreate the smoothness. You can make it better, but its not the same. I don't want to get into explaining 1st and 2nd order balancing but a V6 has 2 advantages over an I4 that can never be duplicated no mater how high tech you make the engine.
Smoothness of Power: A V6 always has 2 cylinders firing (one near the beginning of its power stroke and one near the end). This is impossible to achieve with a four cylinder engine. The result is a much more uniform power delivery, which is a desirably quality in a luxury car. The more cylinders you have, the smoother the power.
Reduced Vibration: While a V6 isn't close to ideal, it is better than I4's. Even with damped mounts and such, vibration will be transmitted through the chassis. Vibration characteristics vary with engine configuration and displacement, but a small V6 has less vibration than an I4 of similar size or power. It is possible to practically eliminate the dynamic imbalance with a V8.
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A 60 degree V6 has Primary Balance, an inline 4 does not, thus the balance shafts required. That was one of the problems with the inline 5 cyclinder in the Hummer H3 and Colorado Canyon. It still needed balance shafts so it cost as much as the V6 if not more. It has less to do with the firing order and more to do with the angle between the banks. Just compare the difference in smoothness between a 90 Degree V Twin Ducati and a 45 Degree V Twin Harley. Night and day.
Gosh you guys are almost going to make me pull out my engine design text books from college....................almost.
