[ASAP]

I may be starting the most dangerous thread on this forum but at least it's in the right section. To start... stock for stock; there is no need to compare these motors; in fact it would be silly as the S55 has 130 more HP and way more TQ.

Some facts-

S55/N54

Both Twin Turbo (albeit it's still debatable as to what turbos the S55 has and how they have been modified), The N54 has Td03's as we all know.

Both 3.0L Inline 6 Motors

The rest are build material and quality differences that at these power levels may be considered negligible. Open deck vs closed deck and so forth, so forth.

The main and most telling difference is usable powerband and revability of the motor. The N54 redlines at just under 7K but the turbos lose steam past approx 5900-6000 RPM.

The S55 Redlines at 7600 rpm but has its peak usable power from the high 5000s to the low 7000s which is a huge difference.

We all know the N54 is extremely tunable and was even chosen as being good enough by BMW M to power the 1M. Stock turbo and with all boltons the engine can easily produce upwards of 440 WHP on E85 / Meth and upwards of 390-400 WHP on pump gas. We do not yet know the tuning capabilities of the S55 for many reasons (undisclosed turbo, potentially uncrackable ECU and so forth).

How will these motors compare at similar power levels? Discuss