Okay, make way for the sketchiest post in scavenger hunt history. This is going to take a bit of interpretation.
1. One turbine is good, but two are better! Any car twin-turbocharged from the factory.
Bentley Continental GT Speed (with photobombing Fiat 500)
2. RennSport. Any RS car (having "RS" in its name).
Nope, didn't get one.
3. Locked 'n loaded! Military vehicle. Army jeeps, trucks, or vehicles of paramilitary police forces (SWAT, riot police, etc) will count. Vehicles owned by civilians count, too, but only exact same models as used by the military.
I saw this motorcycle and sidecar in Amsterdam, I'm almost 100% sure it was ex-military. I think the sidecar had a red star on the front, too. Does this count?
4. The real racing layout. Mid-engine car. Extra point if it costs $50k or more.
Lamborghini Countach. I think that costs more than 50k, yes?
5. Power of the Silver Arrow. Most powerful Mercedes, measured by HP. Factory power counts.
Nope, didn't even see an AMG.
Bonus car: Porsche Panamera.
IIRC, we can post up to three of these, right? If so:
Yes, that's a Phantom Coupe.
Another terrible photo, but it's still a Panamera.