08-20-2013, 03:39 PM | #1 |
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a question for you tech heads out there
our m5 has a 4.4 L V8. AMG 63s have a 6.3L V8. more displacement, more torque, lower redline. why does bmw choose smaller engines vs. MB? one reason i can think of is smaller engines have a bigger rev-range, which would make power modulation and thus control more manageable. this translates to better handling and a faster car when direction changes are needed. any other thoughts?
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08-20-2013, 03:41 PM | #2 | |
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08-20-2013, 03:45 PM | #3 |
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08-20-2013, 04:15 PM | #5 | |
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That said, although their 5.5L Twin Turbo V8 Engine is 1.1L larger, they also still have their turbo's mounted on the flanks. Our S63tu engines are optimized for drastic reductions in Turbo Lag, Mercedes AMG's are not. Additionally, although the Mercedes engines have a nice exhaust note, because they are a larger discplacement engine and have the traditional combustion flow through the engine giving them their signature AMG throaty, rumble, and roar; I like our S63tu's better. We have the cross manifold, flat crank-ish sound, which is more similar to a Ferarri sound than a big Mustang V8 sound. I think the S63tu sounds way more exotic, especially when straightpiped.
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08-20-2013, 04:19 PM | #6 | |
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08-20-2013, 04:19 PM | #7 | |
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Just kidding nugent!
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08-20-2013, 04:25 PM | #8 |
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true, but the spirit of the question still stands. why is bigger not necessarily better?
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08-20-2013, 04:34 PM | #9 |
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08-20-2013, 04:48 PM | #10 |
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Here is what I don't understand. BMW uses a SMALLER displacement engine with 2 turbos vs AMG but AMG manages to avoid the GGT. That seems like an engineering fail for BMW.
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08-20-2013, 05:04 PM | #11 | |
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The AMG engine in S form has more HP, more torque, and better fuel efficiency than our 4.4l. There's no gas guzzler tax on the E63AMG and I don't know about the S-AMG version but Mercedes was saying they hoped to avoid gas guzzler on that too.
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08-20-2013, 05:11 PM | #12 |
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I don't know how the AMG 5.5L TT V8 manages its fuel or if it really is in fact better, but I do know that the U.S. EPA is the one who determines a GGT based on their assesments of MPG. It could be that the AMG engine really is more fuel efficient or maybe Mercedes paid the EPA to make the BMW engines have a GGT. I'm too lazy to research this right now. Lol!
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08-20-2013, 05:12 PM | #13 |
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maybe MB has more lobbyists at the EPA
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08-21-2013, 02:23 AM | #14 |
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Yes corrected.
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08-21-2013, 02:25 AM | #15 |
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On a side note: I sat in my mate next doors New Mercedes to test the tech, and it's light years behind BMW's.
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