[draggeur]

I just did a parts comparison on RealOEM between g20 330e, 330i. There has been some discussion on the derating of the 330e ICE compared to the 330i and I was interested to see if BMW derated the physical parts.

On non-engine parts I also included the 340i just to get a sense of how much extra capacity is available for tuning.

For each I used the euro model and manuf date 12/19.

Basic conclusion is that the 330i and 330e are more similar than I expected, particularly the engine parts. It does seem as if the derating is software and that the physical parts are there to cope with a tune.

For the cooling and brakes the 330i and 330e have similar systems as their big brother the 340, so plenty of capacity there.

I would want to better understand the 330e's transmission's capacity before going for one of those crazy tunes. The 330i is similar to the 340i but the 330e is quite a complex arrangement as it has the built in electrical motor but does not increase its physical size. I imagine it would be v. costly to replace if you had to...

Some weird differences:
The 330e has a higher powered fan than both the 330i or the 340i but a different water pump. I wonder if the engineers are taking advantage of all the extra electrical juice to increase the air cooling and decrease the water cooling?

Also the 340i and 330i both have a 2.81 gear ratio on the rear differential but the 330e has a 3.23 gear ration. This should let the 330e accelerate marginally faster with the same power but have a lower top speed. Not sure why they did that?


Engine:
Short engine: 330i and 330e both listed as B48B20B but part numbers are different
Cylinder Head:330i and 330e both same
Crankshaft: 330i and 330e both same
Piston: 330i and 330e both same
Connecting rod: 330i and 330e both same
Oil pump and drive: 330i and 330e both same
Turbo charger coolant lines: 330i and 330e both same
Heat Management modules: 330i and 330e both same
Intake manifold: 330i and 330e both same
Turbo charger and exhaust manifold: 330i and 330e both same
Coolant Pump: 330i and 330e are different but use same water pump. 330e seems designed to incorporate an energy recovery system

Cooling system:
Engine cooling radiator 330i, 330e and 340i all same
Transmission cooling radiator 330i, 330e and 340i all same
Expansion tank 330i, 330e and 340i all same
Electric water pump 330i and 340i same 330e different
Aux water pump 330i and 340i same 330e different
Main cooling fan: 330i is 400w, 340i is 500w and 330e is 1000w

Brakes
Front disks and calipers: 330i, 330e and 340i all same
Rear disks and calipers: 330i, 330e and 340i all same

Transmission
Automatic Transmission: 330i and 340i both GA8HP51Z but have different part numbers 330e is GA8P75HZ that incorporates the electric motor
Rear Differential: 330i and 330e are both 190AL but 330e has a 3.23 gear ratio and 330i has a 2.81 gear ratio

Main Drive shaft
330i, 330e and 340i all different

Fuel and Air Intake
Throttle: 330i, 330e both same
High pressure fuel rail and injectors: 330i, 330e both same
High pressure fuel pump: 330i, 330e both same
Air duct: 330i, 330e both same
Air intake: 330i, 330e both same

Exhaust systems
330i, 330e are different