[dsmclone]

I'm just thankful that they are still offering a turbo 6. So many other brands have went from 6 to turbo 4 as your only option. Some get better power and some get better MPG but few do both and the majority sound like crap.

[Lucky13]

Originally Posted by aerobod

If you look at BMWs intentions for engine output, the power class designation gives a clue to what will happen on the B58 engine in the future from a power output perspective.

On the N55 engine “M” (middle), “O” (upper) and “T” (top) designations were used with the following top power and torque outputs in each class:
N55B30M0 - 225kW/400Nm (302bhp)
N55B30O0 - 240kW/450Nm (322bhp)
N55B30T0 - 272kW/500Nm (365bhp)

So far the top power and torque outputs for the B58 engines released and announced are:
B58B30M0 - 265kW/500Nm (355bhp)
B58B30O1 - 285KW/500Nm (382bhp)

So for the “M” designated engines, the B58 has 40kW (18%) more power than the N55 and for the “O” designated engines the B58 has 45kW (19%) more power than the N55. This could imply a “T” designated B58 engine would have a nominal 320kW (430bhp) rating as specified from the factory.

Ok now I’m really confused, I thought the M240 has 335 hp so what is its model number? The B58 MO in the 340/440 is 320 hp.

[aerobod]

Originally Posted by Lucky13

Ok now I’m really confused, I thought the M240 has 335 hp so what is its model number? The B58 MO in the 340/440 is 320 hp.

M240i has the B58B30M0 with 250kW (335bhp)
340i/440i do have the B58B30M0 with 240kW (320bhp)
540i and 340i/440i with M performance pack get the B58B30M0 with 265kW (355bhp).
The new Z4 M40i gets the 285kW (382bhp) B58B30O1 in certain countries, the B58B30M1 with 250kW (335bhp) in other countries.

The same engine model number can come with multiple power outputs, the comparison I gave was for the highest power output for a given engine model.

More info here: https://en.wikipedia.org/wiki/BMW_B58