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0-60 Times of 550i, 545i, and 540i...?
I have searched this forum top to bottom, and I can't seem to find more than a few accurate references to published acceleration numbers - and none for the 550i.
As I am in the market for a 550i-6 in about nine months, I am interested to see how quick it is (I know it is limited to 155 mph). Is it faster than my Porsche (0-60 in about 4.9 seconds)?
I know the (E39) 540i-6 was about 5.4 seconds (I tested it myself - my dad's - with a G-Timer), and the 545i-6 about 5.2 seconds. Logic would say the E60 550i-6 should be about 5 flat, or a bit under.
Have you seen any magazine tests?
| | Reply » 0-60 Times of 550i, 545i, and 540i...? |
Road and Track got 5.3 secs on their 545i and C/D got 5.5 secs. I think the old 540i and 545i are about the same for 0-60 with small differences, but the hp really takes over as speeds increase.
Car and Driver says "Sixty mph is yours in 5.5 seconds, same as a 282-hp 540i we tested in 1998. But the older, less powerful car, which was 232 pounds lighter, was 0.9 second slower to 100 mph and two seconds slower to 130 mph."
I havent seen anything regarding the 550i.
| | Reply » 0-60 Times of 550i, 545i, and 540i...? |
Quote: I have searched this forum top to bottom, and I can't seem to find more than a few accurate references to published acceleration numbers - and none for the 550i.
As I am in the market for a 550i-6 in about nine months, I am interested to see how quick it is (I know it is limited to 155 mph). Is it faster than my Porsche (0-60 in about 4.9 seconds)?
I know the (E39) 540i-6 was about 5.4 seconds (I tested it myself - my dad's - with a G-Timer), and the 545i-6 about 5.2 seconds. Logic would say the E60 550i-6 should be about 5 flat, or a bit under.
Have you seen any magazine tests? | Assuming an average 545i hits 60 in 5.2 seconds, then it's reasonable to assume an average 550i would do it in about 5 flat. With all else equal, acceleration will vary as the cube root of the power to weight delta, so with the same gearing and vehicle weights, the 550i will accelerate around 3.5% quicker than the 545i.
That said, 0-60 times are not a very good indication of how quick a car actually is. As an example, even with 0-60 times pretty much equal, your Porsche should be well ahead of the 550i at 60 mph, because its weight distribution allows for banzai launches. Remember, time to speed has essentially nothing to do with time to distance.
If you doubt this, consider the following:
Car A goes 0-100 in 13.2, and 0-108 in about 15 flat.
Car B goes 0-100 in about 11.5, and 0-108 in 13.2.
Question: Who's ahead at 100? (either vehicle's 100)
Answer: In this case, car A wins. Impossible, you say?
Nope. In this case, car A was a GMC Syclone (remember those old AWD turbo v6 pickups?), car B was my old '93 LT-1 Corvette 6-speed, and the race was at a drag strip. He (the Syclone) brake-torqued to build boost, and came off the line like a ball bearing out of a slingshot. I got a decent launch, but spent the entire quarter mile rowing the 6-speed in an effort to make up lost ground. At the line, I was coming on like gangbusters, but he just nipped me. The time slips said 13.22 at 108 for me, 13.20 at 100 for him.
'Nuff said.
Bruce
| | Reply » 0-60 Times of 550i, 545i, and 540i...? |
Quote: | Remember, time to speed has essentially nothing to do with time to distance. | While you have a good point, I think it's a stretch to claim that time to speed has essentially nothing to do with time to distance. There is some correlation.
| | Reply » 0-60 Times of 550i, 545i, and 540i...? |
| | Reply » 0-60 Times of 550i, 545i, and 540i...? |
Quote: | While you have a good point, I think it's a stretch to claim that time to speed has essentially nothing to do with time to distance. There is some correlation. | It's one of the hardest things to explain in drag racing.
Break out the 1/4 in 1/16ths and it's easier.
Think of a car that is winning half the race, only to be overcome by higher speed, one car could be topped out in terms of acceleration and now only gaining speed slowly. So it gets to 50mph fast but not as proportional in the last 10mph increase.
You are driving the average $140,000 Lingenfelter "twin-turbo" powered Corvette Z06. Over a mile up the road, a Top Fuel dragster is staged and ready to launch down a quarter mile strip as you pass. You have the advantage of a flying start. You run the 'Vette hard up through the gears and blast across the starting line and past the dragster at an honest 200 mph. The 'tree' goes green for both of you at that moment. The dragster launches and starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums and within 3 seconds the dragster catches and passes you. He beats you to the finish line, a quarter mile away from where you just passed him.
The other problem in the real world is "reaction time" (green light untill you cross the start time light).
Nothing worse than having a quicker 1/4 mile time and losing the race. The 1/4 mi time starts not on green, but after you cross the timing light. The previous example would need to include "reaction time".
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0-60 Times of 550i, 545i, and 540i...?