So I was just lookin around, and I decided it would be fun to see what wiki has about our engine, I came across this interesting little tidbit
"Further, the long-stroke forged crankshaft from the M47 motor coupled with an overbore of +2 mm will make for a 2.1 L Stroker M42. The 86 mm pistons from a European 3.0 L S50 will produce a high compression, stroker M42 when coupled with the M47 crank. The addition of a MAF conversion from an M50 engine and properly setup cams, valvetrain, and tuning will yield potent output from the "lowly" M42."
Is this feasable? The M47 engine came out of a european diesel model that never hit the states. According to this....we can have a 2.1L using BMW parts and bump our engines to another level.