Hi,
I am looking to buy the 2000 bi-Vanos version of this car.
I am curious as to the official acceleration time of this car.
Some sites post 7.5 secs and some post 8.8 secs, which to me is a substantial difference – given that the 530i with only 30 more hp is said to be doing 7.1, and the 525i is said to have a virtually identical spec as the 528i.
2.5L = 2.8L < 3L? I find this odd.
Also, this one car I’m looking at has Dinan Auto transmission software, Stage 2 software and a Cold Air Intake. I understand this is a sanctioned after-market upgrade that yields more power and removes the speed limiter. How much more power and more importantly – what is the improvement to acceleration?
Thanks very much!
THANK YOU very much for your time and trouble! I never thought anyone was going to reply, let alone so considerately.
I don’t drive fast, but I drive long distances and every so often I like effortlessness in overtaking.
So are you saying with Dinan the car becomes more drivable with no real change to acceleration?
Maybe my other question should be if I should get a stock 530i or a 525i instead? Thanks again!!!
2.5L = 2.8L < 3L? Yes, oddly enough. In 1996, legislation called On Board Diagnostics II was enacted. All cars had to be compliant, indicating a bump in emissions control durability standards, monitoring of more emissions parameters, and standardized data logging interfaces. To make up for the power lost in the process, BMW replaced the 2.5 liter models with 2.8 liter models of the same horsepower. Pre OBDII 2.5 BMWs were 189-194 hp in the US, same as the OBDII 2.8L BMW. When an OBDII 2.5L did come out (323i badged), it only made 170 hp.
Those acceleration times you have sound about right. Don’t expect chipping a naturally aspirated engine like this to change the overall performance measurably. What they can do is quicken throttle response and open the throttle further when you’re giving the car part throttle. When you floor the car, you’re still just fully opening the same throttle that was always there, feeding air to the same combustion chambers at the same compression ratio. You can wake an engine up, remove the top speed governor, and make it feel peppier, but you’re not likely to change your time slips.
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2.5L = 2.8L < 3L? Yes, oddly enough. In 1996, legislation called On Board Diagnostics II was enacted. All cars had to be compliant, indicating a bump in emissions control durability standards, monitoring of more emissions parameters, and standardized data logging interfaces. To make up for the power lost in the process, BMW replaced the 2.5 liter models with 2.8 liter models of the same horsepower. Pre OBDII 2.5 BMWs were 189-194 hp in the US, same as the OBDII 2.8L BMW. When an OBDII 2.5L did come out (323i badged), it only made 170 hp.
Those acceleration times you have sound about right. Don’t expect chipping a naturally aspirated engine like this to change the overall performance measurably. What they can do is quicken throttle response and open the throttle further when you’re giving the car part throttle. When you floor the car, you’re still just fully opening the same throttle that was always there, feeding air to the same combustion chambers at the same compression ratio. You can wake an engine up, remove the top speed governor, and make it feel peppier, but you’re not likely to change your time slips.
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