06-15-2011, 05:11 PM | #266 | |
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The engine only delivers torque as output of interest and power is just a calculated theoretical parameter (Tq x rpm). The acceleration is completely proportional with the torque. OK, so why is BMWPower06 right in his statement then since this seems to prove Enzo's position? BMWPower06 includes the transmission line and the reduction (gear/bridge-diff/wheels) and then the game changes. When you have an engine capable of producing high power = much torque at high rpm, you can install a SHORT tranmission to cover the speed range. With a slow running (cfr. big displacement diesel), you need a LONG transmission to cover the same speed range. So when engine 1 tops at 300Nm@2000 rpm and is out of steam at 4000rpm, its transmission is twice "as long" as an engine delivering 300Nm@4000rpm running uptill 8000rpm. Notice that the POWER of engine 2 is double as high as the one of engine 1. Now it all comes together with the last physical law: Output on the wheels is output of the engine multiplied with the overall reduction of the entire transmission line. So a SHORT transmission (high rpm at lower speeds) multiplies the engine torque more than a LONG transmission (low RPM at high speeds). The conversion is pure proportional so in the former case: both engines deliver 300Nm, but the one with the SHORT transmission has DOUBLE the wheel torque and hence double the force to fit in Newtons law= Acceleration = force / mass. And this is the main reason a F1 is this bloody fast: it has low torque (helping in keeping the mass low) but revs over 18000rpm, allowing a fantastic output multiplication in the transmission line to cover the speed range required. So you're both right concerning F1, high power is the nominator and low mass in the denominator both are not contradicting each other but both components are equally important and fundamental. Simple: this new M5 would accelerate identical with an engine delivering 1360Nm and a cut off at 3600rpm instead of 680Nm with cut off at 7200rpm. Assuming the mass of the car remains the same. Notice that the power is in both case equal at 560hp, the torque however is massively different. So Enzo and Ross are wrong and BMWPower06 is right! :-) Last edited by KoenG; 06-15-2011 at 06:35 PM.. |
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06-15-2011, 05:59 PM | #267 |
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This new M5 is just brilliant!
The 4,4seconds to 62mph only reveals partially the massive boost it will deliver since RWD is no longer capable transforming all this violence in lateral traction. The 62-124mph acceleration of just 8,6 seconds is more speaking and relevant I guess. Also the in gear acceleration is impressive: 80-120km/h in 4th and 5th are just staggering. Has somebody noticed the frugality of the engine? It even consumes less than the 550i! The E60M5 consumed 22 liters/100km in city conditions and the F10 only 14, which is even 10% less than my E39 530i that not even contains half this engine! WOW When I check UK prices, the price is 35%more than the 550i, which also seems to place the M5 underneath the E63AMG. Seems a good position to me and all this could mean that the running costs have improved on this beauty. |
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06-15-2011, 06:31 PM | #268 |
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Oh yeah... And a 295-30/20 tire will cost like 500$ a piece
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06-15-2011, 07:04 PM | #269 |
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Incredible engine bay
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06-15-2011, 07:10 PM | #270 |
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I'd luv to put the 528i bumper caps and badges on this thing and have the ultimate sleeper...
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06-15-2011, 09:58 PM | #273 | |
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06-15-2011, 11:22 PM | #274 |
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how can you not like this!
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06-16-2011, 12:36 AM | #275 |
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06-16-2011, 12:50 AM | #276 |
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I'm mixed on the initial viewing. I need to see this in person to confirm or deny my thoughts.
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06-16-2011, 01:27 AM | #277 |
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I wonder what they've done to the steering. Drove the new X3, steering felt the closer to my grandma's old Buick. They wouldn't have added a mechanical power steering unit to the M, would they?
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06-16-2011, 05:56 AM | #278 |
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06-16-2011, 06:56 AM | #279 |
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06-16-2011, 09:44 AM | #280 |
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06-16-2011, 08:14 PM | #284 |
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Let's wait and see what the "real" mpg numbers are. 28.5 MUST be a thing of fiction. This M5 is one of the best looking versions of the car. I love all of the revisions and I wish I wouldn't have to take on another mortgage in order to own one. Fantastic car!!!
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06-16-2011, 09:14 PM | #285 | |
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Quote:
Updated official info to clarify this.
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06-17-2011, 02:53 AM | #286 |
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Looks stunning!, very nice color!
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