On this episode of Head 2 Head, Motor Trend’s Jonny Lieberman pits the 2013 BMW M5 against the 2013 Porsche Panamera GTS in an epic super sedan showdown. The battle begins in California’s Mojave desert with a classic quarter-mile drag race. Then Jonny takes both V-8 powered sports saloons up to Big Bear, California to find out which one carves up the winding mountain roads the best.

As the BMW european deliveries for the 2013 M5 (F10) continue, so do the journals from our M5POST members.

This great photo journal from hsiaochinsan covers the 5 days of his trip, with a special visit to the BMW M Studio at the M headquarters in Garching, Germany.

Check out the full set of photos inside.

Read on as M5POST member RPiM5 shares his full 2013 F10 M5 European Delivery review with us – pre and post-break in and more.

Velos Designwerks video announcing their F10 M5 and F12/F13 M6 Stage 1 Performance Software Tune (for the S63Tu engine). Initial power gain estimates for the Stage 1 tune is roughly 73 hp and 80 lb ft of torque.

The 2013 F10 M5 with its 4.4L V8 S63Tu turbo engine has previously been shown to be underrated from the factory, which is BMW’s habit with its official quote power figures.

The latest results showing this come from iND who have just begun performance testing on their F10 M5. The result was 527 RWHP (rear wheel horsepower) on a totally stock F10 M5 running on pump gas and dyno’d on a dynojet. This represents just a 6% drivetrain loss.

The M5′s S63tu V8 runs a higher … CONTINUED

Check out the first “Superman Combo” F10 M5, a Frozen Monte Carlo Blue exterior / Sakhir Orange interior 2013 BMW M5 recently delivered to M5POST member CanadezoM5.

In case you missed it in the large photo set from our first F10 M5 european delivery day thread, here are the first looks at a one-off F10 M5 Polizei car by BMW.

Based on the US spec F10 M5, this M5 police car is a show car only and not intended for actual police use. It will be on display at the Welt until Thursday.

BMW does make several models available for the police (including 3 series, 5 series and X5), as well as security vehicles.

See BMW … CONTINUED

Saturday, September 1 marked the first BMW european delivery date for the 2013 M5 (F10) and it was an epic one. We can’t recall another more anticipated european delivery date for a single model than this.

24 F10 M5s were delivered on Saturday – 22 of them to M5POST members (list), totaling 13,000+ horsepowers And that’s just in one day! The rest of the week and beyond will see more and more lucky owners meeting their new M5s for the first time.

We were on hand to greet … CONTINUED

DRIVE looks back at the generations of the 2013 F10 M5 and F12/F13 M6 and examine the new body-control technologies that manage its weight, and help them perform like smaller, lighter cars.

iND has started on its first F10 M5 portfolio project car, for their client, Tom. Per iND:

Perhaps the effect will wear off in time, but for now seeing an F10 M5 in the flesh feels like peering into a toy store. For our client Tom, who has already brought several of his cars to us for some special touches, even a stock twin-turbo super sedan cannot be left untouched. Tom has been an ardent BMW enthusiast since medical school, jumping right into the fray with … CONTINUED