[1] A few weeks after its presentation, BMW showed a study of the XM with a more powerful version of the engine.

The S68 is the only current production V8 engine offered with a cross-pattern exhaust manifold for improved turbo charger pressure by combining exhaust pulses which comes at an expense of sound alternation, making the sound closer to a 180 degree configuration V8.

The 48-volt battery found in the X7 M60i, XM, and the 760i models has a capacity of 20 Ah.

[7] The variable camshaft control (VANOS) is now electrical and no longer hydraulic.

[2][3] A maximum speed of 7200 rpm is reported for the combustion engine.