645 vs 650

Re: 645 vs 650

it is just about proportionate. actually getting 100bhp/1000cc is very very respectable already. so what else do you want? rocket booster ah.
 
Re: 645 vs 650

In BM speak, the latest engines normally triumph over the older ones. I used to drive a E39 520i of the 1991cc engine capacity and now drive a E39 520i of 2171cc engine capacity. The horsepower increase is 20bhp.
The bigger engine feels lively, revs free'er and makes the right noises. Only drawback is a drop of 10% in fuel mileage. Can't win eh? I hear the latest 523i is even much better! But I bet both the 645 or 650 will put a wide smile to anyone's face :)
 

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