what is the diff between the bmw m3 and the bmw 330 ci both 2002 model?
m3 http://www.lotustalk.com/forums/attachments/f162/76321d1205537385-fs-2002-bmw-m3-excellent-condition-going-cheap-picture_-007.jpg
330 ci http://www.keycops.co.uk/images/cars/2753.jpg
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Actually there is a world of difference.
Engine: 330 ci uses BMW’s 3.3 litre straight six with a single throttle. This engine was widely used in slightly different configs on many 3 series cars and the same block was used for some 5 series as well.
The M3 has its own engine. Like other M engines it follows the F1 technologies and uses an individual throttle for each cylinder which requires a special fuel injection and completely different management s/w. It uses a higher compression rate, has double VANOS to independent variable valve timing and produces 333 HP stock with higher rev limiter than regular 3 series.
Gearbox: The M3 has a six speed close ration Getrag manual as standard. It can also be purchased with SMG sequential manual gearbox which actually uses the same manual Getrag box with electro-hydrolic system to shift gears. This generation SMG is not preffered over the manual unlike the newer units used in M5. By the way, the 330i can also be ordered with the SMG used in M3, but the management is not the same due to the fact that M3 engine was designed with special fly by wire for computer controlled throttle blipping during gear shifting.
Suspension: BMW M3 has a specially tuned suspension. It is quite hard comparing to stock 330i and is not adjustble from factory. Pretty nice on the track though, but your girlfriend might compain that her teeth are being shaken out if you drive it around town.
Differential: M3 has it’s very own diff that is a limited slip like all other cars with a lower gear ratio.
To finalize BMW M3 has a sports tuned 4 tip exhaust with it’s very own note that sounds better than the car stereo.
It would be easier to list all the things they have in common.
Think of it this way.
In 20 years from now, the 330Ci will be in a junkyard gathering rust.
In the same 20 years the ///M3 will still be a ///M3
The M3 has a 333 HP 3.2L I-6 while the 330 CI has a 225 HP 3.0L I-6.
everything…. the ci is a 2-door version of the sedan…. the M3, well the letter M itself tells you its a whole new world of BMW. The difference is everywhere…. the engine, the performance, the look, the price, the parts…..