[986tate]

I got the numbers for everything but 986 from youwheel.com....car-body-torsional-rigidity-a-comprehensive-list. 986 wasn't included but according the Excellence Magazine Boxster History page, the 987 is 4% stiffer. Therefore (987) 12600 Nm/deg divide by 1.04 gives 12115 Nm/deg for the 986. Not to bad really.
Still wish the roof wouldn't creak when I exit the driveway.

Lamborghini Countach 2600 Nm/deg
Honda S2000 7100
Mazda MX-5 (NC) 8132
Lotus Elise 10000
Porsche 986 Boxster 12115
Porsche 987 Boxster 12600
McLaren F1 13500
Ferrari 360 Modena 23000
Porsche Carrera GT 26000
Porsche 987 Cayman 31500

Perhaps you can draw the conclusion that if 13500 is good enough for the Mclaren F1 then the 986 is 90% awesome