The staggering performance of the BMW X5 M and X6 M has been priced at the staggering price of $86,225 and 89,725 respectively. Making 555 HP soft-roaders go around corners ain't cheap.

The BMW X5 M and BMW X6 M, both powered by brand-new 555 HP 4.4-liter V8 M engines, are the first all-wheel-drive models in the history of the BMW M series.

It's possible BMW may not have hired the most clever web designers for the BMW X6 M website as the source code contains some rather telling tags, like "550 HP" and "Twin Scroll Twin Turbo."

Some are suggesting that the BMW X5 and X6 prototypes you see here will wear the sacred "M" badge when they reach production. The rules used to state that all BMW "M" cars must be naturally aspirated and rear-wheel-drive. But with rumors of turbochargers being bolted to future M-models, and now the prospect of these…