I have a 530i and would like to know how I could improve the 0-60 (make it quicker) the car is an E39 petrol, what can I do and what kind of costs? I am in the UK. Any advice would be great apart from the obvious "buy another car"
Thanks

You could hire a tower crane. Acceleration due to gravity is 10m/s2. Might affect your no claims bonus 'though.

Alternatively borrow a mate's Top Gear mag and take a look in the classified ads at the back - there's usually a few tuning/chipping companies listed and a couple of calls will give you an idea of cost.

For free/cheap improvement remove any unnecessary weight from the boot etc, and never fill the tank above half full using premium unleaded over standard. Also overinflating the tyres reduces the amount of tread on the road and therefore rolling resistance so will shave half a second or so off the 0-60 time, but in view of the wet weather we are having lately and the fact that your car is rear wheel drive I wouldn't recommend it.

Alter the gearing ratio... Costly around $2000

Alternatively fit a new ECU to allow you to rev beyond 8000 rpm $300

Between those all i can suggest is NOS about $1400 fully fitted check out this website...

Try an fsp power boost valve starts around £100 . A sports exhaust and air filter . or you could try a super chip and some re mapping there is lots of low cost ways to improve your bhp but to get any real hp you will need to spend a few quid . Have a look on Google for your local tuning center one with a rolling road would be best .