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  #1  
Old 01-20-2013, 06:28 PM
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0 - 60 performance...does it get worse with age?

Does the best 0 - 60 time that a car can achieve get worse with car age due to wear and tear? Just like body integrity, shocks, and the like get affected with age, do engine horsepower and torque get reduced?

Every car I've owned for a long period of time felt slower by the time I had owned it several years. Is this just a perception thing (because I'm now used to a more powerful motor and it takes more to make me feel I'm going fast), or is there truly performance degradation?

If it gets worse, how much worse can it get?
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2014 328i / Liquid Blue / Beige Leatherette / 4 DR / 6 MT / Moonroof / Rear Camera + PDC / Xenons / DHP / 12K+ Miles / Bought 10-16-2013
2003 325i / Gray Green / Beige Leatherette / 4 DR / 5 MT / Moonroof / 219K+ Miles / Bought 12-21-2002 / Sold 10-21-2013
1998 Civic EX / Vogue Silver / Gray / 4 DR / 5 MT / 122K+ Miles / Bought 12-30-1997 / Totaled 08-2002
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Last edited by mr_clueless; 01-20-2013 at 06:30 PM.
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  #2  
Old 01-21-2013, 02:19 AM
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Andrew*Debbie Andrew*Debbie is offline
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Generally yes.

How much and how soon varies widely. Maintenance or lack of, may contribute. Other things, like a worn suspension, can also increase 0-60 times.

Many of the latest BMW engines are flat rated. That means the ECU software limits maximum HP and torque across a wide RPM band. In that case, it is possible that the engine software will make up for engine wear. At least initially. At some point the motor will loose enough compression that there isn't anything engine management software can do.


Electric cars are different. The motors don't wear in the same way. Brushes might wear, but those are easily replaced. Range will degrade as the batteries age though.
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Last edited by Andrew*Debbie; 01-21-2013 at 02:21 AM.
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  #3  
Old 01-24-2013, 08:56 AM
Michael Schott Michael Schott is online now
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HP will diminish over time as parts wear. I remember a Top Gear episode where they bought used luxury cars like A BMW 850, etc. These cars were about 20 years old if I remember correctly. They took them to a dyno and found they had lost significant amounts of HP. Something like 25%. Proper maintenance could minimize this issue.

Also, car magazines often do long term tests. Typically 40,000 miles. When retested most of the cars are slightly slower than when first tested.
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Old 01-24-2013, 09:28 AM
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Quote:
Originally Posted by Michael Schott View Post
HP will diminish over time as parts wear. I remember a Top Gear episode where they bought used luxury cars like A BMW 850, etc. These cars were about 20 years old if I remember correctly. They took them to a dyno and found they had lost significant amounts of HP. Something like 25%. Proper maintenance could minimize this issue.

Also, car magazines often do long term tests. Typically 40,000 miles. When retested most of the cars are slightly slower than when first tested.
That makes a lot of sense. I have found that as my cars age, I find myself having to rev them harder to get power. It helps to know that there is real loss of power and that it's not just me getting used to it and wanting more.
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2014 328i / Liquid Blue / Beige Leatherette / 4 DR / 6 MT / Moonroof / Rear Camera + PDC / Xenons / DHP / 12K+ Miles / Bought 10-16-2013
2003 325i / Gray Green / Beige Leatherette / 4 DR / 5 MT / Moonroof / 219K+ Miles / Bought 12-21-2002 / Sold 10-21-2013
1998 Civic EX / Vogue Silver / Gray / 4 DR / 5 MT / 122K+ Miles / Bought 12-30-1997 / Totaled 08-2002
1988 Sentra / Gray / Gray / 2 DR / 4 MT / 190K+ Miles / Bought 06-1994 @ 120K+ Miles / Died 12-1997
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  #5  
Old 01-24-2013, 09:55 AM
usaret usaret is offline
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Quote:
Originally Posted by mr_clueless View Post
That makes a lot of sense. I have found that as my cars age, I find myself having to rev them harder to get power. It helps to know that there is real loss of power and that it's not just me getting used to it and wanting more.
It's not just you. The loss of power comes from ring and cylinder wear that causes the ring gap to open up and lower compression. Frequent oil changes and not lugging the engine are the best bet for long life.
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Old 01-24-2013, 10:05 AM
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It's not just you. The loss of power comes from ring and cylinder wear that causes the ring gap to open up and lower compression. Frequent oil changes and not lugging the engine are the best bet for long life.
I think I've been slack with respect to oil changes following BMW's recommended schedule. Right now the car needs 1-2 additional quarts every 15K miles.
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2014 328i / Liquid Blue / Beige Leatherette / 4 DR / 6 MT / Moonroof / Rear Camera + PDC / Xenons / DHP / 12K+ Miles / Bought 10-16-2013
2003 325i / Gray Green / Beige Leatherette / 4 DR / 5 MT / Moonroof / 219K+ Miles / Bought 12-21-2002 / Sold 10-21-2013
1998 Civic EX / Vogue Silver / Gray / 4 DR / 5 MT / 122K+ Miles / Bought 12-30-1997 / Totaled 08-2002
1988 Sentra / Gray / Gray / 2 DR / 4 MT / 190K+ Miles / Bought 06-1994 @ 120K+ Miles / Died 12-1997
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